Enhance Atoms and Layout Documentation

- Updated ATOMS.md to include new LoginInput and ErrorMessageLogin components with detailed usage examples and props descriptions.
- Adjusted the status and created date in ATOMS.md.
- Refined the layout and styling descriptions in LAYOUTS.md for Header and Footer components, including responsive behavior and accessibility improvements.
- Added new sections for WiFi card and social links in the Footer documentation.
- Improved code formatting and consistency across various components in the codebase.

.blackboxrules

@@ -1,5 +0,0 @@
-## Rules:
-    - Khi làm một tính năng mới, trước khi hoàn thành phải update các file mark down mà thư mục đó được update.
-    - Khi có từ khóa "Yêu cầu" và một list các yêu cầu thì phải hoàn thành ĐÚNG yêu cầu, không thêm không bớt.
-    - Sử dụng thư viện tailwind CSS để code css cho project.
-    - Mỗi feature được update đều phải được responsive với các kích cỡ màn hình như smartphone, tablet, desktop.

.claude/skills/agent-orchestrator/SKILL.md

@@ -0,0 +1,209 @@
+---
+name: agent-orchestrator
+description: >
+  Breaks down large, multi-step software tasks into structured sub-agents on the
+  Claude Code CLI using the Task tool. Use this skill whenever the user
+  describes a complex project or feature that has multiple components - e.g.,
+  "build a login API with JWT and unit tests", "set up a CI/CD pipeline with
+  Docker and GitHub Actions", "create a full-stack todo app with auth, REST API,
+  and frontend". Trigger this skill when the task clearly has more than one
+  distinct sub-system, layer, or concern that could be worked on in parallel or
+  in sequence. DO NOT trigger for simple, single-step tasks like "write a
+  function to reverse a string" or "fix this bug".
+---
+
+# Agent Orchestrator
+
+A skill for decomposing large engineering tasks into parallel and sequential
+sub-agents on Claude Code CLI using the **Task tool**.
+
+## When to Use
+
+Trigger when the user's task has **multiple distinct components** - for example:
+
+- "Build a REST API with authentication, rate limiting, and unit tests"
+- "Set up a monorepo with shared packages, CI pipeline, and deployment configs"
+- "Create a data pipeline: ingest transform store visualize"
+
+Do **not** trigger for single-step tasks (e.g., "rename this variable", "add a
+README").
+
+---
+
+## Prompt Template
+
+Copy the block below and paste it into your Agent Code CLI session. Replace the
+placeholder in the `TASK` variable with your actual task description.
+
+---
+
+```
+You are a senior engineering orchestrator operating inside the Agent Code CLI.
+
+TASK: "Build a login API with JWT and unit tests"
+
+---
+
+Your job is to analyze this task, decompose it into well-scoped sub-tasks, identify dependencies between them, and execute them using the Task tool.
+
+Follow these steps exactly:
+
+---
+
+## STEP 1 - Guard: Is this task complex enough?
+
+If the task can be completed in a single step by a single agent (e.g., "rename a variable", "write one function"), respond with:
+> "This task is simple enough to handle directly - no orchestration needed."
+Then complete it yourself. Stop here.
+
+Otherwise, continue.
+
+---
+
+## STEP 2 - Decompose the task into sub-tasks
+
+Analyze the TASK string. Break it into a flat list of concrete, independently scoped sub-tasks. Each sub-task must:
+- Have a clear, specific goal
+- Be executable by a single focused agent
+- Produce a concrete output (file, module, config, test suite, etc.)
+
+Output the list in this format:
+
+Sub-tasks:
+  [T1] <sub-task title> - <one-sentence description>
+  [T2] <sub-task title> - <one-sentence description>
+  [T3] ...
+
+---
+
+## STEP 3 - Identify dependencies and execution mode
+
+For each sub-task, decide whether it can run in parallel with others, or must run after a specific predecessor.
+
+Label each sub-task as one of:
+  [PARALLEL]               - no dependencies, can start immediately
+  [SEQUENTIAL - after Tx]  - must run only after sub-task Tx completes
+
+Rules:
+- If a sub-task depends on an artifact produced by another (a file, schema, interface, module), mark it SEQUENTIAL.
+- If two sub-tasks are fully independent (different files, no shared state), mark both PARALLEL.
+- Do not start any SEQUENTIAL sub-task until its prerequisite is confirmed complete.
+
+Output the dependency plan in this format:
+
+Dependency Plan:
+  [T1] <title>    [PARALLEL]
+  [T2] <title>    [PARALLEL]
+  [T3] <title>    [SEQUENTIAL - after T1]
+  [T4] <title>    [SEQUENTIAL - after T2, T3]
+
+---
+
+## STEP 4 - Confirm plan before execution
+
+Print the full decomposition and dependency plan to the user.
+Then print:
+> "Starting execution. Spawning parallel sub-agents now..."
+
+Do not skip this confirmation step.
+
+---
+
+## STEP 5 - Execute using the Task tool
+
+Use the **Task tool** to spawn sub-agents. Follow this protocol:
+
+### 5a. Spawn all [PARALLEL] sub-tasks simultaneously
+- Call the Task tool for each PARALLEL sub-task at the same time (do not wait for one to finish before spawning the next).
+- Each Task call must include a self-contained prompt describing exactly what to build, where to put files, and what the expected output is.
+
+### 5b. Monitor and gate SEQUENTIAL sub-tasks
+- Wait for each prerequisite Task to complete before spawning its dependent.
+- Once a prerequisite completes, immediately spawn the next Task.
+
+### 5c. Task prompt format
+Each task spawned via the Task tool must include:
+
+  - Role: "You are a focused sub-agent. Complete exactly this sub-task and nothing else."
+  - Sub-task goal (from Step 2)
+  - Output location (file path or module name)
+  - Any relevant interfaces or contracts from predecessor tasks (if SEQUENTIAL)
+  - Instruction to report back: "When done, summarize what you built and list output files."
+
+---
+
+## STEP 6 - Synthesize and report
+
+After all Tasks complete:
+1. Collect each sub-agent's summary.
+2. Verify that all expected outputs exist.
+3. Report to the user:
+   - What was built
+   - File/module structure
+   - Any issues or gaps found
+   - Suggested next steps (e.g., "Run `npm test` to verify", "Review the generated OpenAPI spec")
+
+---
+
+Begin now with STEP 1.
+```
+
+---
+
+## Tips for Customizing the Template
+
+- **Replace the TASK value** with your actual task string. Keep it on one line,
+  in quotes.
+- **Add context if needed**: Append lines after `TASK:` like
+  `STACK: "Node.js, PostgreSQL, Jest"` or
+  `CONSTRAINTS: "Use ESM modules only"` - the orchestrator will incorporate
+  them.
+- **For monorepos or specific file layouts**: Add a `STRUCTURE:` hint, e.g.:
+  ```
+  STRUCTURE: "src/api/, src/auth/, src/tests/, docker-compose.yml"
+  ```
+- **To limit parallelism** (e.g., on resource-constrained machines): Add
+  `MAX_PARALLEL_AGENTS: 2` after the TASK line.
+
+---
+
+## Example Usage
+
+**Input task:**
+
+> "Build a login API with JWT authentication and unit tests"
+
+**Expected orchestrator output (before execution):**
+
+```
+Sub-tasks:
+  [T1] Project scaffold - Initialize Node.js project, folder structure, and dependencies
+  [T2] Database schema - Define User model and migration for PostgreSQL
+  [T3] Auth service - Implement JWT sign/verify logic and password hashing
+  [T4] Login route - Build POST /auth/login endpoint with validation
+  [T5] Middleware - Create JWT auth middleware for protected routes
+  [T6] Unit tests - Write Jest tests for auth service and login route
+
+Dependency Plan:
+  [T1] Project scaffold      [PARALLEL]
+  [T2] Database schema       [PARALLEL]
+  [T3] Auth service          [SEQUENTIAL - after T1]
+  [T4] Login route           [SEQUENTIAL - after T3]
+  [T5] Middleware            [SEQUENTIAL - after T3]
+  [T6] Unit tests            [SEQUENTIAL - after T4, T5]
+
+Starting execution. Spawning parallel sub-agents now...
+```
+
+T1 and T2 spawn immediately. T3 spawns once T1 completes. T4 and T5 spawn once
+T3 completes. T6 spawns last.
+
+---
+
+## Notes
+
+- This skill requires Agent Code CLI with the **Task tool** enabled.
+- Each spawned sub-agent has no memory of the others - pass all needed context
+  explicitly in the Task prompt.
+- For very large tasks (10+ sub-tasks), consider breaking the orchestration into
+  phases and applying this skill recursively per phase.

.claude/skills/frontend-atomic-design/SKILL.md

@@ -0,0 +1,483 @@
+---
+name: frontend-atomic-design
+description: Create modern, responsive frontend components and layouts using atomic design methodology with Tailwind CSS. Use this skill whenever building React components, designing UI layouts, creating responsive pages, or working with atomic design principles. Triggers include: component development, page design, responsive design requests, Tailwind CSS styling, creating design systems, building reusable UI elements, or designing for multiple screen sizes (desktop, tablet, mobile). This skill emphasizes reusable variables, modern aesthetics, and responsive design across all viewport sizes.
+---
+
+# Atomic Design Frontend System with Tailwind CSS
+
+A comprehensive guide for building modern, responsive frontend applications
+using atomic design principles and Tailwind CSS.
+
+## Core Principles
+
+### 1. Atomic Design Hierarchy
+
+Atomic Design breaks UI into five distinct levels:
+
+#### **Atoms**
+
+Smallest, indivisible UI elements that cannot be broken down without losing
+functionality.
+
+- Buttons, input fields, labels, icons, text styles
+- Color variables, spacing units, typography scales
+- Simple, pure, reusable building blocks
+
+```jsx
+// Example: Button Atom
+<button className="rounded-lg bg-blue-600 px-4 py-2 text-white transition-colors hover:bg-blue-700">
+  Click me
+</button>
+```
+
+#### **Molecules**
+
+Groups of atoms bonded together, forming simple functional units.
+
+- Search bars (input + button + icon)
+- Form fields (label + input + error message)
+- Card headers (avatar + title + subtitle)
+- Navigation items with icons and labels
+
+```jsx
+// Example: Search Molecule
+<div className="flex items-center gap-2 rounded-lg border border-gray-300 px-4 py-2">
+  <SearchIcon className="h-5 w-5 text-gray-500" />
+  <input type="text" placeholder="Search..." className="flex-1 outline-none" />
+</div>
+```
+
+#### **Organisms**
+
+Complex functional units made of groups of molecules and/or atoms.
+
+- Header/Navigation bars
+- Form sections (multiple form molecules)
+- Card layouts with multiple sections
+- Modals with title, content, and actions
+- Data tables with headers, rows, and pagination
+
+```jsx
+// Example: Product Card Organism
+<div className="overflow-hidden rounded-lg border border-gray-200 shadow-sm transition-shadow hover:shadow-md">
+  <img src="image.jpg" className="h-48 w-full object-cover" />
+  <div className="p-4">
+    <h3 className="text-lg font-semibold">Product Name</h3>
+    <p className="mt-1 text-sm text-gray-600">Description</p>
+    <div className="mt-4 flex items-center justify-between">
+      <span className="font-bold text-blue-600">$99</span>
+      <button className="rounded bg-blue-600 px-3 py-1 text-white">Add</button>
+    </div>
+  </div>
+</div>
+```
+
+#### **Templates**
+
+Page-level wireframes showing layout and component placement without final
+content.
+
+- Single-column layouts
+- Two-column layouts (sidebar + main)
+- Grid-based layouts
+- Hero + content sections
+
+#### **Pages**
+
+Specific instances of templates populated with real content and data.
+
+- Homepage with actual products
+- User profile with real user data
+- Dashboard with live metrics
+
+---
+
+## Design System Variables (Reusable Values)
+
+### Color Palette
+
+```css
+/* Define in Tailwind config or use CSS variables */
+Primary: #2563eb (blue-600)
+Secondary: #7c3aed (violet-600)
+Success: #16a34a (green-600)
+Warning: #ea580c (orange-600)
+Danger: #dc2626 (red-600)
+Neutral: #6b7280 (gray-500)
+```
+
+### Typography Scale
+
+```css
+H1: 32px (2rem) - font-bold
+H2: 24px (1.5rem) - font-bold
+H3: 20px (1.25rem) - font-semibold
+Body: 16px (1rem) - font-normal
+Small: 14px (0.875rem) - font-normal
+Tiny: 12px (0.75rem) - font-normal
+```
+
+### Spacing Scale
+
+```css
+xs: 4px (0.25rem)
+sm: 8px (0.5rem)
+md: 16px (1rem)
+lg: 24px (1.5rem)
+xl: 32px (2rem)
+2xl: 48px (3rem)
+```
+
+### Border Radius
+
+```css
+Subtle: 4px (rounded-sm)
+Standard: 8px (rounded-lg)
+Large: 12px (rounded-xl)
+Full: 9999px (rounded-full)
+```
+
+### Box Shadows
+
+```css
+Subtle: 0 1px 2px rgba(0,0,0,0.05)
+Soft: 0 4px 6px rgba(0,0,0,0.07)
+Medium: 0 10px 15px rgba(0,0,0,0.10)
+Strong: 0 20px 25px rgba(0,0,0,0.15)
+```
+
+---
+
+## Responsive Design Strategy
+
+### Breakpoints (Tailwind Default)
+
+```
+Mobile:   < 640px    (sm)
+Tablet:   640px      (md, lg)
+Desktop:  1024px+    (xl, 2xl)
+```
+
+### Mobile-First Approach
+
+1. **Start with mobile styles** (default, no prefix)
+2. **Layer tablet styles** (md: prefix)
+3. **Layer desktop styles** (lg:, xl: prefix)
+
+### Example: Responsive Layout
+
+```jsx
+// Mobile: 1 column, Tablet: 2 columns, Desktop: 3 columns
+<div className="grid grid-cols-1 gap-4 md:grid-cols-2 lg:grid-cols-3">
+  {items.map((item) => (
+    <Card key={item.id} {...item} />
+  ))}
+</div>
+```
+
+### Common Responsive Patterns
+
+**Responsive Typography**
+
+```jsx
+<h1 className="text-2xl font-bold md:text-3xl lg:text-4xl">
+  Responsive Heading
+</h1>
+```
+
+**Responsive Padding/Margins**
+
+```jsx
+<div className="p-4 md:p-6 lg:p-8">Content with responsive spacing</div>
+```
+
+**Responsive Grid**
+
+```jsx
+<div className="grid grid-cols-2 gap-4 md:grid-cols-3 md:gap-6 lg:grid-cols-4">
+  {/* Grid items */}
+</div>
+```
+
+**Responsive Flexbox**
+
+```jsx
+<div className="flex flex-col gap-4 md:flex-row">
+  <aside className="w-full md:w-64">Sidebar</aside>
+  <main className="flex-1">Main content</main>
+</div>
+```
+
+**Responsive Images**
+
+```jsx
+<img
+  src="image.jpg"
+  className="h-auto w-full object-cover"
+  alt="Responsive image"
+/>
+```
+
+---
+
+## Modern Design Patterns
+
+### 1. Consistency & Visual Hierarchy
+
+- **Use consistent spacing**: Apply spacing scale uniformly
+- **Establish clear hierarchy**: Size, weight, color for emphasis
+- **Group related content**: Use whitespace to separate sections
+- **Align elements**: Use grids for crisp layouts
+
+```jsx
+<section className="space-y-6">
+  <div>
+    <h2 className="mb-2 text-2xl font-bold">Section Title</h2>
+    <p className="text-gray-600">Description text</p>
+  </div>
+  <div className="space-y-4">{/* Related items with consistent spacing */}</div>
+</section>
+```
+
+### 2. Interactive Feedback
+
+- **Hover states**: Subtle color/shadow changes
+- **Active states**: Indicate current selection
+- **Focus states**: Keyboard navigation support
+- **Loading states**: Spinners or skeleton screens
+- **Transitions**: Smooth animations (200-300ms)
+
+```jsx
+<button className="rounded-lg bg-blue-600 px-4 py-2 text-white transition-all duration-200 hover:bg-blue-700 focus:ring-2 focus:ring-blue-500 focus:outline-none active:scale-95 disabled:cursor-not-allowed disabled:opacity-50">
+  Actionable Button
+</button>
+```
+
+### 3. Depth & Layering
+
+- **Subtle shadows**: Create depth without heaviness
+- **Elevation levels**: Consistent shadow progression
+- **Overlays**: Semi-transparent backgrounds for modals
+- **Z-index strategy**: Clear layering hierarchy
+
+```jsx
+<div className="rounded-lg border border-gray-200 shadow-sm transition-shadow duration-300 hover:shadow-md">
+  Card content
+</div>
+```
+
+### 4. Color Usage
+
+- **Primary action**: Most frequent call-to-action
+- **Secondary action**: Alternative actions
+- **Semantic colors**: Status indicators (success, warning, danger)
+- **Contrast**: Ensure WCAG AA compliance (4.5:1 ratio)
+- **Limited palette**: 3-5 colors maximum in most designs
+
+### 5. Whitespace & Breathing Room
+
+- Don't crowd elements
+- Use consistent gap values (gap-4, gap-6, gap-8)
+- Separate sections with vertical rhythm
+- Generous padding in cards and containers
+
+```jsx
+<div className="mx-auto max-w-4xl px-4 py-8 md:px-6 md:py-12">
+  <div className="space-y-8">{/* Sections with good breathing room */}</div>
+</div>
+```
+
+---
+
+## Tailwind CSS Best Practices
+
+### 1. Use Utility Classes Effectively
+
+```jsx
+// Good: Semantic, reusable, organized
+<button className="
+  px-4 py-2
+  bg-blue-600 text-white
+  rounded-lg
+  hover:bg-blue-700
+  transition-colors
+  disabled:opacity-50
+">
+  Submit
+</button>
+
+// Avoid: Too many utilities, hard to read
+<button className="px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 active:scale-95 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200">
+```
+
+### 2. Extract Reusable Components
+
+```jsx
+// Create a Button component to avoid repetition
+const Button = ({ children, variant = "primary", ...props }) => {
+  const baseStyles = "px-4 py-2 rounded-lg font-medium transition-colors";
+  const variants = {
+    primary: "bg-blue-600 text-white hover:bg-blue-700",
+    secondary: "bg-gray-200 text-gray-900 hover:bg-gray-300",
+    danger: "bg-red-600 text-white hover:bg-red-700",
+  };
+
+  return (
+    <button className={`${baseStyles} ${variants[variant]}`} {...props}>
+      {children}
+    </button>
+  );
+};
+```
+
+### 3. Organize Utility Classes
+
+```jsx
+// Organize by category: layout → sizing → colors → effects → responsive
+<div className="/* Layout */ /* Sizing */ /* Spacing */ /* Colors & text */ /* Borders & shadows */ /* Effects */ /* Responsive */ my-8 flex w-full max-w-2xl flex-col gap-4 rounded-lg border border-gray-200 bg-white p-6 text-gray-900 shadow-sm transition-shadow hover:shadow-md md:flex-row lg:gap-6"></div>
+```
+
+### 4. Use Tailwind Config for Consistency
+
+```js
+// tailwind.config.js
+module.exports = {
+  theme: {
+    extend: {
+      colors: {
+        primary: "#2563eb",
+        secondary: "#7c3aed",
+      },
+      spacing: {
+        gutter: "1rem",
+      },
+    },
+  },
+};
+```
+
+---
+
+## Component Construction Template
+
+Use this template when building atomic components:
+
+```jsx
+/**
+ * {Component Name}
+ *
+ * Atoms/Molecules/Organisms level component
+ * Purpose: [Brief description]
+ *
+ * Props:
+ *   - prop1: type - description
+ *   - prop2: type - description
+ */
+
+export const ComponentName = ({ prop1, prop2, className = "" }) => {
+  return (
+    <div
+      className={`/* Base styles */ /* Responsive */ /* Custom className */ flex flex-col gap-4 rounded-lg border border-gray-200 bg-white p-6 md:flex-row lg:p-8 ${className} `}
+    >
+      {/* Component content */}
+    </div>
+  );
+};
+```
+
+---
+
+## Layout Patterns
+
+### Container + Padding
+
+```jsx
+<div className="mx-auto max-w-6xl px-4 md:px-6 lg:px-8">
+  {/* Content constrained to max width with responsive padding */}
+</div>
+```
+
+### Two-Column Sidebar Layout
+
+```jsx
+<div className="flex flex-col gap-6 lg:flex-row">
+  <aside className="w-full flex-shrink-0 lg:w-64">
+    {/* Sidebar: full width on mobile, fixed on desktop */}
+  </aside>
+  <main className="min-w-0 flex-1">
+    {/* Main content: takes remaining space */}
+  </main>
+</div>
+```
+
+### Responsive Grid
+
+```jsx
+<div className="grid grid-cols-1 gap-6 md:grid-cols-2 lg:grid-cols-3">
+  {/* Items automatically stack on mobile, 2 columns on tablet, 3 on desktop */}
+</div>
+```
+
+### Hero Section
+
+```jsx
+<section className="relative overflow-hidden bg-gradient-to-r from-blue-600 to-violet-600 py-12 text-white md:py-20 lg:py-32">
+  <div className="relative z-10 mx-auto max-w-6xl px-4 md:px-6">
+    <h1 className="mb-4 text-4xl font-bold md:text-5xl lg:text-6xl">
+      Hero Title
+    </h1>
+    <p className="mb-8 max-w-2xl text-lg opacity-90 md:text-xl">
+      Hero subtitle or description
+    </p>
+    <button className="rounded-lg bg-white px-8 py-3 font-semibold text-blue-600 transition-colors hover:bg-gray-100">
+      Call to Action
+    </button>
+  </div>
+</section>
+```
+
+---
+
+## Accessibility & Best Practices
+
+1. **Semantic HTML**: Use `<button>`, `<a>`, `<form>`, etc. appropriately
+2. **Color contrast**: Ensure 4.5:1 for text, 3:1 for UI components
+3. **Focus states**: Always visible keyboard navigation (`focus:ring-2`)
+4. **ARIA labels**: Add when needed (`aria-label`, `aria-describedby`)
+5. **Responsive text**: Use relative sizing, not fixed pixels
+6. **Touch targets**: Minimum 44x44px for interactive elements
+
+```jsx
+<button
+  className="min-h-[44px] px-4 py-3 focus:ring-2 focus:ring-offset-2 focus:outline-none"
+  aria-label="Close modal"
+>
+  ✕
+</button>
+```
+
+---
+
+## Performance Considerations
+
+1. **Limit custom CSS**: Rely on Tailwind utilities
+2. **Tree-shake unused styles**: Configure Tailwind content paths
+3. **Optimize images**: Use responsive images, WebP format
+4. **Lazy load**: Defer non-critical components
+5. **Minimize bundle**: Use PurgeCSS in production
+
+---
+
+## Quick Reference Checklist
+
+When building a component, ensure:
+
+- [ ] Follows atomic design hierarchy (Atom/Molecule/Organism)
+- [ ] Uses design system variables (colors, spacing, typography)
+- [ ] Responsive across mobile, tablet, desktop
+- [ ] Consistent hover/active/focus states
+- [ ] Proper whitespace and visual hierarchy
+- [ ] Semantic HTML structure
+- [ ] Accessible (contrast, focus, labels)
+- [ ] Mobile-first approach
+- [ ] No hardcoded values (use Tailwind config)

.claude/skills/frontend-atomic-design/manifest.json

@@ -0,0 +1,7 @@
+{
+  "name": "frontend-atomic-design",
+  "version": "1.0.0",
+  "description": "Create modern, responsive frontend components and layouts using atomic design methodology with Tailwind CSS",
+  "author": "Claude",
+  "created": "2026-04-12"
+}

.claude/skills/prompt-optimizer/SKILL.md

@@ -0,0 +1,112 @@
+---
+name: prompt-optimizer
+description:
+  Help users rewrite and improve AI/LLM prompts by adding specificity, context,
+  and constraints. Trigger this skill whenever users ask to improve, rewrite,
+  optimize, or refine prompts for AI models. Focus on making prompts clearer,
+  more specific, and more likely to produce better AI results. Present
+  suggestions interactively so users can choose which improvements to apply.
+---
+
+# Prompt Optimizer
+
+A beginner-friendly skill for improving AI/LLM prompts to get better results.
+
+## What This Skill Does
+
+This skill helps you rewrite prompts to work better with AI models like Claude.
+Instead of just giving you a rewritten prompt, it shows you specific improvement
+suggestions that you can choose to apply or skip.
+
+## Key Improvements
+
+When optimizing a prompt, focus on three main areas:
+
+### 1. **Specificity** — Making the Request Clear
+
+Good prompts are specific about what you want. Vague prompts get vague results.
+
+**Example improvements:**
+
+- Add details about format: "Give me a bullet list of 5 items" instead of "tell
+  me about X"
+- Be clear about length: "Write 200 words" instead of "Write something short"
+- Define who the audience is: "Explain this for a 10-year-old" or "Use technical
+  language"
+
+### 2. **Context** — Giving the AI Background Information
+
+More context helps the AI make better decisions.
+
+**Example improvements:**
+
+- Explain the goal: "I'm writing a resume, so focus on professional language"
+- Share constraints: "We only have $500 budget" or "It needs to work on mobile"
+- Provide background: "I already know Python but not JavaScript"
+
+### 3. **Constraints** — Setting Boundaries
+
+Constraints prevent unwanted outputs.
+
+**Example improvements:**
+
+- Set length limits: "Keep it under 100 words"
+- Specify format: "Use JSON format" or "Write as a numbered list"
+- Define tone: "Be casual and friendly, not formal"
+- Say what NOT to include: "Don't use technical jargon"
+
+## How to Use This Skill
+
+1. **Share your prompt** — Give me the original prompt you want to improve
+2. **Review suggestions** — I'll show you specific improvements in each area
+3. **Choose what you like** — Pick which suggestions to apply
+4. **Get the final version** — I'll rewrite your prompt with your chosen
+   improvements
+
+## Interactive Selection Process
+
+When you use this skill, you'll see:
+
+- **Original prompt** — Your starting point
+- **Improvement suggestions** — Specific changes grouped by category
+  (Specificity, Context, Constraints)
+- **Preview examples** — What each change would look like with the improvement
+  applied
+- **Your choices** — You pick which suggestions help most (you can apply all,
+  some, or none)
+
+Then you get a rewritten prompt combining all your choices.
+
+### Example Interaction
+
+**Original:** "Write me a blog post"
+
+**Suggestions I might offer:**
+
+- **Specificity**: Add a topic (e.g., "about sustainable living")
+- **Context**: Explain your goal (e.g., "to build authority on my website")
+- **Constraints**: Set a word count (e.g., "800-1000 words")
+
+**Your choice:** "I want all three — add topic, goal, and word count"
+
+**Final rewritten prompt:** "Write an 800-1000 word blog post about sustainable
+living for my website. The goal is to establish my authority on eco-friendly
+practices. Target an audience of people interested in reducing their carbon
+footprint. Include 3-4 practical tips they can implement immediately, and end
+with a call-to-action encouraging them to sign up for my newsletter."
+
+## Tips for Best Results
+
+- **Start simple** — Even small improvements help
+- **Focus on your goal** — What outcome do you want?
+- **Add one constraint at a time** — Too many rules can be confusing
+- **Test and iterate** — Try the new prompt and see if results improve
+
+## What Makes a Good Prompt
+
+A prompt becomes "good" when:
+
+- The AI understands exactly what you want ✓
+- You've given enough context to explain why ✓
+- You've set boundaries to prevent bad outputs ✓
+- Someone else could read it and understand your intent ✓

.claude/skills/ui-ux-testing/SKILL.md

@@ -0,0 +1,302 @@
+---
+name: ui-ux-testing
+description:
+  Automated visual regression testing and UI/UX analysis for web applications.
+  Use this skill whenever developers mention "test this UI", "visual
+  regression", "test the UI", "check this interface", "UI testing", or want to
+  create automated tests for web pages. Analyzes URLs and generates
+  comprehensive test strategies including Playwright/Cypress test scripts,
+  manual testing checklists, visual regression detection, and detailed reports
+  with findings and recommendations.
+compatibility:
+  tools: Claude in Chrome browser automation
+  frameworks: Playwright, Cypress, Selenium
+---
+
+# UI/UX Testing Skill
+
+This skill helps developers create automated visual regression tests and
+comprehensive UI/UX testing strategies for web applications.
+
+## Overview
+
+When a developer asks you to test a UI or create visual regression tests, this
+skill guides you through:
+
+1. **Analyzing the target URL** - Inspect the web page structure and components
+2. **Generating test strategies** - Create both automated and manual testing
+   approaches
+3. **Writing test code** - Generate Playwright/Cypress test scripts or Selenium
+   code
+4. **Creating test checklists** - Manual testing steps for visual regression and
+   UX flows
+5. **Generating reports** - Detailed findings, issues, and recommendations in
+   markdown/HTML
+
+## When to Trigger
+
+Trigger this skill when the user:
+
+- Provides a URL and asks to "test this UI"
+- Requests "visual regression testing" for a web page
+- Wants to "check accessibility" or test a component
+- Asks to "create automated tests" for a UI
+- Wants a "testing strategy" or "test plan" for a web application
+- Mentions QA, testing, or validation of UI components
+
+## Workflow
+
+### Step 1: Inspect the Target URL
+
+Use Claude in Chrome to:
+
+- Navigate to the provided URL
+- Take screenshots of different viewport sizes (desktop, tablet, mobile)
+- Inspect the DOM structure using `read_page` tool
+- Identify key components, interactive elements, and critical flows
+- Note responsive behavior and CSS properties
+
+### Step 2: Create a Test Strategy
+
+Based on your inspection, identify:
+
+- **Visual elements** to regression test (buttons, forms, headers, layouts)
+- **Interactive flows** to test (hover states, click handlers, form submission)
+- **Responsive breakpoints** to validate (mobile, tablet, desktop)
+- **Accessibility concerns** (ARIA labels, color contrast, keyboard navigation)
+- **Critical user paths** to validate (common workflows)
+
+### Step 3: Generate Test Code
+
+**For Automated Testing (Choose one or more):**
+
+#### Playwright (Recommended)
+
+```javascript
+// Example structure
+import { expect, test } from "@playwright/test";
+
+test("visual regression - homepage", async ({ page }) => {
+  await page.goto("https://example.com");
+
+  // Capture baseline screenshot
+  await expect(page).toHaveScreenshot("homepage.png");
+
+  // Test interactive elements
+  await page.hover("button.primary");
+  await expect(page).toHaveScreenshot("button-hover.png");
+});
+
+test("responsive layout - mobile", async ({ page }) => {
+  await page.setViewportSize({ width: 375, height: 812 });
+  await page.goto("https://example.com");
+  await expect(page).toHaveScreenshot("mobile-layout.png");
+});
+```
+
+#### Cypress
+
+```javascript
+describe("Visual Regression Tests", () => {
+  beforeEach(() => {
+    cy.visit("https://example.com");
+  });
+
+  it("captures baseline screenshot", () => {
+    cy.screenshot("homepage");
+    cy.get('[data-testid="header"]').should("be.visible");
+  });
+
+  it("tests button hover state", () => {
+    cy.get("button.primary").trigger("mouseenter");
+    cy.screenshot("button-hover-state");
+  });
+});
+```
+
+#### Selenium
+
+```python
+from selenium import webdriver
+from selenium.webdriver.common.by import By
+from PIL import Image
+
+driver = webdriver.Chrome()
+driver.get('https://example.com')
+
+# Capture screenshot
+driver.save_screenshot('homepage.png')
+
+# Test responsive
+driver.set_window_size(375, 812)
+driver.save_screenshot('mobile-view.png')
+```
+
+### Step 4: Create Manual Testing Checklist
+
+Generate a checklist including:
+
+- [ ] **Visual Consistency**
+  - [ ] All elements render correctly at 1920x1080
+  - [ ] All elements render correctly at 1366x768
+  - [ ] All elements render correctly at 768x1024 (tablet)
+  - [ ] All elements render correctly at 375x667 (mobile)
+  - [ ] Colors match design specifications
+  - [ ] Typography renders correctly (font families, sizes, weights)
+  - [ ] Images load and display at correct aspect ratios
+
+- [ ] **Responsive Behavior**
+  - [ ] Layout adapts correctly on mobile (no horizontal scroll)
+  - [ ] Navigation collapses/expands appropriately
+  - [ ] Form inputs are touch-friendly (min 44x44px)
+  - [ ] Content reflows without overlapping
+
+- [ ] **Interactive Elements**
+  - [ ] All buttons are clickable and have hover states
+  - [ ] Form inputs accept user input
+  - [ ] Dropdowns open/close correctly
+  - [ ] Links are underlined and properly colored
+
+- [ ] **Accessibility**
+  - [ ] Keyboard navigation works (Tab key)
+  - [ ] Color contrast meets WCAG AA standards
+  - [ ] Images have alt text
+  - [ ] Form labels are associated with inputs
+
+- [ ] **Critical User Paths**
+  - [ ] [Specific path 1]: [Steps and expected result]
+  - [ ] [Specific path 2]: [Steps and expected result]
+
+### Step 5: Generate Test Report
+
+Create an HTML/Markdown report with:
+
+```markdown
+# UI/UX Testing Report
+
+## Executive Summary
+
+- URL tested: [URL]
+- Viewports tested: Desktop (1920x1080), Tablet (768x1024), Mobile (375x667)
+- Testing date: [Date]
+- Total issues found: [Count]
+
+## Issues Found
+
+### Critical (Breaks functionality)
+
+1. **Issue Title**
+   - Severity: Critical
+   - Location: [Element/Component]
+   - Steps to reproduce: [Steps]
+   - Expected: [What should happen]
+   - Actual: [What actually happens]
+   - Screenshot: [If applicable]
+
+### Major (Significant visual/UX impact)
+
+1. **Issue Title**
+   - Severity: Major
+   - Location: [Element/Component]
+   - Impact: [User impact]
+
+### Minor (Polish/optimization)
+
+1. **Issue Title**
+   - Severity: Minor
+   - Location: [Element/Component]
+   - Recommendation: [Suggestion]
+
+## Visual Regression Analysis
+
+### Desktop (1920x1080)
+
+- [List observations]
+- [List changes from baseline if available]
+
+### Tablet (768x1024)
+
+- [List observations]
+- [Responsive issues found]
+
+### Mobile (375x667)
+
+- [List observations]
+- [Mobile-specific issues]
+
+## Accessibility Assessment
+
+| Element   | Issue   | WCAG Level | Recommendation |
+| --------- | ------- | ---------- | -------------- |
+| [Element] | [Issue] | [AA/AAA]   | [Fix]          |
+
+## Recommendations
+
+1. **High Priority**
+   - [Recommendation with rationale]
+
+2. **Medium Priority**
+   - [Recommendation with rationale]
+
+3. **Low Priority**
+   - [Recommendation with rationale]
+
+## Test Coverage Summary
+
+- Automated tests needed: [Count and types]
+- Manual test cases: [Count]
+- Estimated testing effort: [Time estimate]
+- Regression risk: [High/Medium/Low]
+
+---
+
+Generated using UI/UX Testing Skill
+```
+
+## Output Options
+
+Based on what the developer needs, generate:
+
+1. **Test Code Only** - Playwright/Cypress/Selenium scripts ready to integrate
+2. **Testing Strategy** - Comprehensive checklist and manual test plan
+3. **Full Report** - Screenshots, findings, issues, and automated test code
+4. **All of the above** - Complete testing package
+
+## Best Practices
+
+- **Multiple viewports:** Always test at least mobile (375px), tablet (768px),
+  and desktop (1920px)
+- **Visual baselines:** Save baseline screenshots before making changes
+- **Critical paths:** Prioritize testing main user workflows first
+- **Accessibility first:** Include WCAG AA compliance checks
+- **Clear assertions:** Make test assertions explicit and meaningful
+- **Maintainability:** Use data attributes (data-testid) for reliable element
+  selection
+
+## Example: Complete Testing Session
+
+1. Developer provides URL: "https://myapp.com/dashboard"
+2. You inspect the page (screenshots, DOM, responsive behavior)
+3. You identify:
+   - Dashboard header with navigation
+   - Data table with sorting/filtering
+   - Form for creating items
+   - Mobile menu collapse
+4. You generate:
+   - Playwright tests for visual regression
+   - Manual testing checklist
+   - HTML report with findings
+5. Developer receives complete testing artifact ready to use
+
+## Tips for Success
+
+- Take screenshots at each viewport to catch responsive issues
+- Test interactive states (hover, focus, active, disabled)
+- Verify critical user journeys end-to-end
+- Include accessibility testing automatically
+- Provide both automated (code) and manual (checklist) approaches
+- Make reports actionable with clear severity levels and recommendations
+
+---
+
+**Last Updated:** 2024 **Skill Version:** 1.0

.claude/skills/website-creation-automation/SKILL.md

@@ -0,0 +1,264 @@
+---
+name: website-creation-automation
+description:
+  Automate end-to-end website creation with AI-powered optimization, design, and
+  testing. Trigger this skill whenever the user wants to create a new website,
+  build a landing page, design a web application, or automatically generate a
+  complete website from a description. This skill takes a user's website idea or
+  prompt, optimizes it for clarity, designs a modern responsive website, and
+  automatically tests it for quality issues. Use this skill for any "create a
+  website" or "build a web application" request, including landing pages,
+  portfolio sites, e-commerce pages, dashboards, or any web-based project.
+compatibility:
+  models:
+    - claude-sonnet-4-20250514 (design and testing)
+    - claude-haiku-4.5-20251001 (bug fixes)
+  required_skills:
+    - prompt-optimizer
+    - frontend-atomic-design
+    - ui-ux-testing
+---
+
+# Website Creation Automation Skill
+
+An intelligent, end-to-end automation workflow for creating complete, tested
+websites from simple prompts.
+
+## What This Skill Does
+
+This skill orchestrates a complete website creation pipeline:
+
+1. **Prompt Optimization** — Takes your website description and optimizes it
+   into a detailed, structured prompt
+2. **Website Design** — Uses the optimized prompt to design and build a modern,
+   responsive website
+3. **Automated Testing** — Tests the generated website for visual, interactive,
+   and responsive issues
+4. **Auto-Fix** — Detects and fixes any issues found during testing
+
+The entire workflow is automated, so you just provide a simple description of
+what you want, and the skill handles the rest.
+
+## Core Workflow
+
+### Step 1: Optimize Your Website Prompt
+
+Your initial description (e.g., "Create a portfolio website for a freelance
+designer") is passed to the **prompt-optimizer** skill, which:
+
+- Adds specific details about layout, features, and target audience
+- Clarifies design preferences and functionality requirements
+- Structures the request to guide high-quality website generation
+- Returns a detailed, optimized prompt ready for design
+
+**Example transformation:**
+
+```
+Input: "Create a portfolio website for a freelance designer"
+↓
+Output: "Create a modern portfolio website for a freelance graphic designer.
+Include: hero section with featured work, project showcase grid (6-8 projects),
+about section, services list, client testimonials, contact form, and footer.
+Target audience: potential clients and collaborators. Design should be minimalist
+with emphasis on visual work. Mobile-responsive. Use modern sans-serif typography
+and white space. Include smooth scroll animations."
+```
+
+### Step 2: Design the Website
+
+The **frontend-atomic-design** skill uses the optimized prompt to:
+
+- Break down the website into atomic components (atoms, molecules, organisms)
+- Create a responsive layout that works on desktop, tablet, and mobile
+- Apply modern design patterns using Tailwind CSS
+- Build interactive elements and proper semantic HTML
+- Generate a complete, production-ready HTML file (or React component)
+
+**Outputs:**
+
+- Full HTML file with embedded CSS and JavaScript
+- All assets (icons, fonts) are self-contained
+- Responsive design with mobile-first approach
+- Accessible markup with semantic HTML5
+
+### Step 3: Test the Website
+
+The **ui-ux-testing** skill performs comprehensive testing:
+
+- Visual regression testing (captures baseline screenshots)
+- Responsive layout validation (mobile, tablet, desktop)
+- Interactive element testing (buttons, forms, links)
+- Accessibility checking (color contrast, keyboard navigation)
+- Cross-browser compatibility assessment
+- User flow validation
+
+**Testing output includes:**
+
+- Screenshots from multiple viewport sizes
+- Detailed findings and issues detected
+- Visual regression comparison
+- Recommendations for improvements
+
+### Step 4: Auto-Fix Detected Issues
+
+Any issues detected in testing are automatically fixed:
+
+- **Using Haiku 4.5** — A faster model optimized for targeted fixes
+- **HTML-only fixes** — Modifications to structure, styling, or interactivity
+- **Preserves design intent** — Fixes maintain the original design aesthetic
+- **Re-validates** — Quick verification that fixes resolved the issues
+
+**Common fixes include:**
+
+- Correcting responsive behavior issues
+- Fixing accessibility problems
+- Adjusting spacing, alignment, or colors
+- Improving interactive element behavior
+- Ensuring all content is properly visible
+
+---
+
+## When to Use This Skill
+
+Use this skill whenever you want to:
+
+- **Create a new website** from scratch based on a description
+- **Build a landing page** for a product, service, or event
+- **Design a portfolio site** to showcase your work
+- **Create an e-commerce page** with product displays
+- **Build a dashboard or web app** UI
+- **Generate a multi-page website** (returns first page, can iterate)
+- **Prototype a website concept** quickly
+
+## How to Trigger This Skill
+
+Simply provide:
+
+1. **Website description** — What kind of website you want (e.g., "e-commerce
+   store for handmade jewelry", "SaaS landing page", "restaurant menu website")
+2. **Optional details** — Any specific requirements (colors, features, tone,
+   audience)
+
+The skill handles everything else automatically.
+
+## Example Usage
+
+**User prompt:** "Create a landing page for a sustainable fashion startup called
+EcoStitch. Include a hero section, features of our eco-friendly materials,
+pricing plans, customer testimonials, and a newsletter signup."
+
+**Skill processes:**
+
+1. Optimizes prompt with specific design details and layout structure
+2. Designs a modern, responsive landing page with all requested sections
+3. Tests layout across mobile/tablet/desktop, forms, links, and visual design
+4. Fixes any responsive or interactive issues found
+5. Returns production-ready HTML file
+
+**Final output:** A complete, tested, bug-free website ready to deploy or
+customize further.
+
+---
+
+## Technical Details
+
+### Model Usage
+
+- **Sonnet 4.6** — Used for optimization, design, and testing (high-quality
+  complex tasks)
+- **Haiku 4.5** — Used for bug fixes only (fast, targeted improvements)
+
+### Skill Integration
+
+This skill coordinates three core skills in sequence:
+
+```
+User Prompt
+    ↓
+[prompt-optimizer] → Optimized Prompt
+    ↓
+[frontend-atomic-design] → HTML/React Website
+    ↓
+[ui-ux-testing] → Test Results + Screenshots
+    ↓
+[Bug Fix Loop] → Fixed HTML/React Website
+    ↓
+Final Website (Ready to Use)
+```
+
+### Output Format
+
+The final website is delivered as:
+
+- **HTML file** — Self-contained with CSS and JavaScript embedded
+- **Screenshots** — Before/after testing comparison
+- **Test report** — Issues found and fixes applied
+- **Deployment ready** — Can be hosted on any static hosting service
+
+---
+
+## Limitations & Notes
+
+- **Single-page output** — Generates one complete page (though can be expanded
+  to multi-page)
+- **Static by default** — Returns HTML; can generate React components if needed
+- **Database-free** — Forms are functional but don't store data without backend
+  integration
+- **Rapid iteration** — If you want to modify the result, you can iterate by
+  running the skill again with updated requirements
+
+---
+
+## Tips for Best Results
+
+1. **Be descriptive** — More detail in your initial prompt leads to better
+   results
+2. **Specify audience** — Who is this website for? (target customers, users,
+   etc.)
+3. **Include features** — What should the website do? (e.g., showcase products,
+   collect emails, etc.)
+4. **Mention style** — Any aesthetic preferences? (minimalist, colorful,
+   corporate, playful, etc.)
+5. **Test thoroughly** — Review the testing results to ensure the site meets
+   your needs
+
+---
+
+## Workflow Diagram
+
+```
+START
+  ↓
+Input: Website Description
+  ↓
+[Call: prompt-optimizer skill]
+  ↓
+Receive: Optimized Detailed Prompt
+  ↓
+[Call: frontend-atomic-design skill]
+  ↓
+Receive: HTML/React Website Code
+  ↓
+[Call: ui-ux-testing skill]
+  ↓
+Receive: Test Results + Issues Found
+  ↓
+Are there critical issues?
+  ├─ YES → [Use Haiku 4.5 to fix] → Re-test
+  ├─ NO → Proceed
+  ↓
+COMPLETE: Return Website + Test Report
+```
+
+---
+
+## Future Enhancements
+
+Potential expansions to this skill:
+
+- Multi-page website generation (homepage, about, services, contact, etc.)
+- CMS integration (connect to content management systems)
+- Backend API scaffolding (Node.js/Express templates)
+- SEO optimization (meta tags, structured data, open graph)
+- Analytics integration (Google Analytics, Mixpanel)
+- E-commerce integration (payment processing, inventory)

AGENTS.md

@@ -17,8 +17,10 @@ Chứa route/page/layout theo Next.js App Router.
   - **`(main)/`** - Main shopping interface (duyệt menu, đăng nhập, đăng ký,
     thanh toán)
   - **`(feed)/`** - Feed/discovery page (khám phá quán)
-  - **`(manager)/`** - Manager dashboard (quản lý sản phẩm, đơn hàng) - **[ĐANG
-    PHÁT TRIỂN]**
+  - **`(manager)/`** - Manager dashboard (quản lý sản phẩm, phân tích tài
+    chính) - **[ĐANG PHÁT TRIỂN ~70%]**
+  - **`(staff)/`** - Staff shift schedule (lịch làm việc nhân viên) - **[HOÀN
+    THÀNH]**
 - **Tài liệu:** `app/APP.md` - Chi tiết routes, pages, CSS tokens
 
 ### `components/` - Reusable UI Components (Atomic Design)
@@ -80,7 +82,14 @@ Sections phức tạp kết hợp molecules + atoms, có logic, data filtering:
 - **`cart/`** - CartFab, CartSummary, CartList
 - **`product-grid/`** - ProductGrid, ProductFilters
 - **`forms/`** - LoginForm, RegisterForm, CheckoutForm, ReviewForm
-- **`modals/`** - ReviewModal, ConfirmModal
+- **`modals/`** - ReviewModal, ConfirmModal, CashPaymentModal, QRPaymentModal,
+  PaymentSuccessModal
+- **`manager/`** - ProductModal (image upload), ComboModal, CategoryModal,
+  DeleteConfirm, StatusBadge, ProductsTab, CombosTab, CategoriesTab
+- **`analytics/`** - BarChart, LineChart, PieChart (SVG), ProductTable,
+  SummaryCard
+- **`shift-schedule/`** - WeeklySchedule, MonthlyCalendar, MobileShiftView,
+  ShiftCreateModal, ShiftDetailModal
 - **`shop-grid/`** - ShopGrid, ShopFilters
 - **`hero-section/`** - HeroSection
 - **`featured-section/`** - FeaturedProducts, FeaturedShops
@@ -103,6 +112,7 @@ Page layouts, không có data cụ thể, children composition:
 - **`main-layout/`** - MainLayout (header + sidebar + content + footer)
 - **`feed-layout/`** - FeedLayout
 - **`manager-layout/`** - ManagerLayout
+- **`staff-layout/`** - StaffLayout (navigation shell for staff pages)
 - **`checkout-layout/`** - CheckoutLayout
 - **`auth-layout/`** - AuthLayout
 
@@ -161,8 +171,12 @@ Chứa logic dùng chung, context, constants, types:
 - **`auth-context.tsx`** - AuthProvider + useAuth() hook (login, logout,
   register)
 - **`cart-context.tsx`** - CartProvider + useCart() hook (add, remove, quantity
-  operations)
+  operations, clearCart)
 - **`menu-context.tsx`** - MenuProvider + useMenu() hook (category state)
+- **`manager-context.tsx`** - ManagerProvider + useManager() hook (CRUD for
+  products, combos, categories)
+- **`shift-context.tsx`** - ShiftProvider + useShift() hook (staff shift
+  management: create, update, delete, date selection)
 - **Tài liệu:** `lib/LIB.md` - Chi tiết types, constants, contexts
 
 ### `public/` - Static Assets
@@ -233,11 +247,41 @@ components/
 │   ├── product-grid/
 │   │   ├── ProductGrid.tsx
 │   │   └── ProductGrid.types.ts
+│   ├── modals/
+│   │   ├── ReviewModal.tsx
+│   │   ├── CashPaymentModal.tsx
+│   │   ├── QRPaymentModal.tsx
+│   │   └── PaymentSuccessModal.tsx
+│   ├── manager/
+│   │   ├── ProductModal.tsx
+│   │   ├── ComboModal.tsx
+│   │   ├── CategoryModal.tsx
+│   │   ├── DeleteConfirm.tsx
+│   │   ├── StatusBadge.tsx
+│   │   ├── ProductsTab.tsx
+│   │   ├── CombosTab.tsx
+│   │   └── CategoriesTab.tsx
+│   ├── analytics/
+│   │   ├── BarChart.tsx
+│   │   ├── LineChart.tsx
+│   │   ├── PieChart.tsx
+│   │   ├── ProductTable.tsx
+│   │   └── SummaryCard.tsx
+│   ├── shift-schedule/
+│   │   ├── WeeklySchedule.tsx
+│   │   ├── MonthlyCalendar.tsx
+│   │   ├── MobileShiftView.tsx
+│   │   ├── ShiftCreateModal.tsx
+│   │   └── ShiftDetailModal.tsx
 │   └── index.ts
 ├── templates/
 │   ├── main-layout/
 │   │   ├── MainLayout.tsx
 │   │   └── MainLayout.types.ts
+│   ├── manager-layout/
+│   │   └── ManagerLayout.tsx
+│   ├── staff-layout/
+│   │   └── StaffLayout.tsx
 │   └── index.ts
 └── ATOMIC_DESIGN.md
 ```
@@ -314,9 +358,15 @@ components/
 - **Mock data first** - Use `lib/constants.ts` for development, replace with API
   later
 - **Contexts for state sharing:**
-  - `AuthContext` (lib/auth-context.tsx) - User state + auth operations
-  - `CartContext` (lib/cart-context.tsx) - Shopping cart + operations
-  - `MenuContext` (lib/menu-context.tsx) - Active category state
+  - `AuthContext` (lib/auth-context.tsx) - User state + auth operations →
+    `useAuth()`
+  - `CartContext` (lib/cart-context.tsx) - Shopping cart + operations →
+    `useCart()` (includes `clearCart`)
+  - `MenuContext` (lib/menu-context.tsx) - Active category state → `useMenu()`
+  - `ManagerContext` (lib/manager-context.tsx) - Manager dashboard state (CRUD
+    for products/combos/categories) → `useManager()`
+  - `ShiftContext` (lib/shift-context.tsx) - Staff shift management (create,
+    update, delete shifts, date selection) → `useShift()`
 - **localStorage keys:** `coffee-shop-user`, `coffee-shop-cart` (defined in
   contexts)
 
@@ -625,21 +675,33 @@ className = "w-full sm:w-1/2 md:w-1/3 p-4 md:p-6 hidden md:block";
 
 ## 5) Project Status
 
+> Last Updated: 2026-04-18
+
 ### ✅ Completed Features
 
 - User authentication (login, register, logout)
 - Product grid display with category filtering
 - Shopping cart with add/remove/update operations
-- Payment page with review modal
+- Payment page with PaymentSummaryCard + review modal
+- Cash payment modal (CashPaymentModal) with change calculation
+- QR payment modal (QRPaymentModal) with QR code generation (`qrcode.react`) and
+  5-second auto-confirm countdown
+- Payment success modal (PaymentSuccessModal) with cart clear
 - Shop discovery (feed page)
 - Responsive design (mobile, tablet, desktop)
 - Header + Footer with navigation
 - Sidebar category filter
+- Manager dashboard — Products, Combos, Categories tabs with full CRUD
+- Product image upload in ProductModal
+- Financial Analytics dashboard (LineChart, BarChart, PieChart, ProductTable)
+- Staff shift schedule (`/staff/schedule`) — weekly/monthly views, mobile view,
+  CRUD shifts, department filter
 
 ### 🚀 In Progress
 
+- Manager dashboard (~70% complete) - `app/(manager)/` route group
+  - Remaining: order management, inventory tracking, real API integration
 - Atomic Design refactoring (components reorganization)
-- Manager dashboard (quản lý sản phẩm) - `app/(manager)/` route group
 
 ### 📋 Planned Features
 

Atomic.md

@@ -1,762 +0,0 @@
-# ATOMIC DESIGN STRUCTURE GUIDE
-
-## Overview
-
-Project sử dụng **Atomic Design Pattern** để tổ chức UI components theo 5 cấp
-độ:
-
-1. **Atoms** - Khối xây dựng cơ bản, không thể chia nhỏ hơn
-2. **Molecules** - Nhóm atoms đơn giản hoạt động cùng nhau
-3. **Organisms** - Khu vực UI phức tạp, riêng biệt
-4. **Templates** - Bố cục cấp trang, cấu trúc nội dung
-5. **Pages** - Các phiên bản cụ thể với dữ liệu thật
-
----
-
-## 1) ATOMS (`components/atoms/`)
-
-**Mục đích:** Khối xây dựng cơ bản, tái sử dụng cao, không phụ thuộc logic phức
-tạp.
-
-Không có context/hooks logic phức tạp, chỉ nhận props từ parent.
-
-### Cấu trúc thư mục
-
-```
-components/atoms/
-├── buttons/
-│   ├── Button.tsx           # Nút cơ bản (primary, secondary, danger)
-│   ├── IconButton.tsx       # Nút chỉ có icon
-│   └── Button.types.ts      # Props types
-├── inputs/
-│   ├── TextInput.tsx        # Text input cơ bản
-│   ├── NumberInput.tsx      # Number input với up/down
-│   ├── Checkbox.tsx         # Checkbox
-│   └── Input.types.ts       # Props types
-├── badges/
-│   ├── Badge.tsx            # Badge cơ bản (color variants)
-│   ├── PriceBadge.tsx       # Badge hiển thị giá
-│   └── Badge.types.ts       # Props types
-├── icons/
-│   ├── StarIcon.tsx         # Rating star icon
-│   ├── CartIcon.tsx         # Shopping cart icon
-│   ├── SearchIcon.tsx       # Search icon
-│   └── icons.types.ts       # Props types
-├── typography/
-│   ├── Heading.tsx          # h1-h6 headings
-│   ├── Text.tsx             # Body text variants
-│   ├── Caption.tsx          # Small caption text
-│   └── Typography.types.ts  # Props types
-├── dividers/
-│   ├── Divider.tsx          # Horizontal divider
-│   └── Divider.types.ts     # Props types
-├── loaders/
-│   ├── Spinner.tsx          # Loading spinner
-│   ├── Skeleton.tsx         # Skeleton loader
-│   └── Loader.types.ts      # Props types
-└── index.ts                 # Barrel export
-```
-
-### Ví dụ Atoms
-
-**Button.tsx:**
-
-```tsx
-import { ButtonHTMLAttributes } from "react";
-
-import type { ButtonProps } from "./Button.types";
-
-export default function Button({
-  variant = "primary",
-  size = "md",
-  disabled = false,
-  children,
-  className = "",
-  ...props
-}: ButtonProps) {
-  const baseStyles =
-    "font-semibold rounded-lg transition-colors disabled:opacity-50";
-  const variants = {
-    primary:
-      "bg-[color:var(--color-primary)] text-white hover:bg-[color:var(--color-primary-dark)]",
-    secondary: "bg-gray-200 text-gray-800 hover:bg-gray-300",
-    danger: "bg-red-500 text-white hover:bg-red-600",
-  };
-  const sizes = {
-    sm: "px-3 py-1 text-sm",
-    md: "px-4 py-2 text-base",
-    lg: "px-6 py-3 text-lg",
-  };
-
-  return (
-    <button
-      className={`${baseStyles} ${variants[variant]} ${sizes[size]} ${className}`}
-      disabled={disabled}
-      {...props}
-    >
-      {children}
-    </button>
-  );
-}
-```
-
-**Button.types.ts:**
-
-```tsx
-import { ButtonHTMLAttributes } from "react";
-
-export interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
-  variant?: "primary" | "secondary" | "danger";
-  size?: "sm" | "md" | "lg";
-  disabled?: boolean;
-  children: React.ReactNode;
-  className?: string;
-}
-```
-
----
-
-## 2) MOLECULES (`components/molecules/`)
-
-**Mục đích:** Nhóm atoms tạo thành những UI unit nhỏ, tái sử dụng, có logic đơn
-giản.
-
-Có thể sử dụng `useState`, nhưng logic chủ yếu nằm ở parent component.
-
-### Cấu trúc thư mục
-
-```
-components/molecules/
-├── form-groups/
-│   ├── FormField.tsx        # Input + label + error message
-│   ├── FormGroup.tsx        # Label + input wrapper
-│   └── FormGroup.types.ts   # Props types
-├── cards/
-│   ├── ProductCard.tsx      # Card hiển thị sản phẩm (image + name + price + btn)
-│   ├── ShopCard.tsx         # Card hiển thị quán
-│   ├── ReviewCard.tsx       # Card hiển thị review
-│   └── Card.types.ts        # Props types
-├── ratings/
-│   ├── RatingStars.tsx      # Hiển thị 5 sao rating
-│   ├── RatingInput.tsx      # Input 5 sao (interactive)
-│   └── Rating.types.ts      # Props types
-├── price-display/
-│   ├── PriceTag.tsx         # Hiển thị giá formatted
-│   ├── PriceRange.tsx       # Hiển thị range giá
-│   └── Price.types.ts       # Props types
-├── search-bar/
-│   ├── SearchInput.tsx      # Search input với icon
-│   ├── SearchBar.tsx        # Search bar wrapper
-│   └── Search.types.ts      # Props types
-├── breadcrumb/
-│   ├── Breadcrumb.tsx       # Breadcrumb navigation
-│   └── Breadcrumb.types.ts  # Props types
-├── tabs/
-│   ├── TabGroup.tsx         # Tabs wrapper
-│   ├── Tab.tsx              # Individual tab
-│   └── Tabs.types.ts        # Props types
-└── index.ts                 # Barrel export
-```
-
-### Ví dụ Molecules
-
-**ProductCard.tsx:**
-
-```tsx
-import Button from "@/components/atoms/buttons/Button";
-import Text from "@/components/atoms/typography/Text";
-import Image from "next/image";
-
-import type { ProductCardProps } from "./Card.types";
-
-export default function ProductCard({
-  product,
-  onAddToCart,
-}: ProductCardProps) {
-  return (
-    <div className="rounded-lg border border-[color:var(--color-border)] bg-[color:var(--color-bg-card)] p-4 shadow-sm transition-shadow hover:shadow-md">
-      <div className="relative mb-3 h-48 w-full overflow-hidden rounded-md">
-        <Image
-          src={product.image}
-          alt={product.name}
-          fill
-          className="object-cover"
-        />
-      </div>
-      <Text variant="body1" className="font-semibold">
-        {product.name}
-      </Text>
-      <Text
-        variant="caption"
-        className="text-[color:var(--color-text-secondary)]"
-      >
-        {product.description}
-      </Text>
-      <div className="mt-3 flex items-center justify-between">
-        <Text
-          variant="body2"
-          className="font-bold text-[color:var(--color-primary)]"
-        >
-          ${product.price.toFixed(2)}
-        </Text>
-        <Button size="sm" onClick={() => onAddToCart(product)}>
-          Add
-        </Button>
-      </div>
-    </div>
-  );
-}
-```
-
----
-
-## 3) ORGANISMS (`components/organisms/`)
-
-**Mục đích:** Khu vực UI phức tạp, độc lập, có logic riêng.
-
-Kết hợp multiple molecules/atoms, có thể sử dụng contexts (useAuth, useCart,
-etc.), state phức tạp.
-
-### Cấu trúc thư mục
-
-```
-components/organisms/
-├── navigation/
-│   ├── Navbar.tsx           # Sidebar category filter (cũ CartProduct)
-│   ├── CategoryMenu.tsx     # Category menu wrapper
-│   └── Navigation.types.ts  # Props types
-├── cart/
-│   ├── CartFab.tsx          # Floating action button giỏ hàng
-│   ├── CartSummary.tsx      # Cart summary widget
-│   ├── CartList.tsx         # Danh sách sản phẩm trong giỏ
-│   └── Cart.types.ts        # Props types
-├── product-grid/
-│   ├── ProductGrid.tsx      # Grid hiển thị danh sách sản phẩm
-│   ├── ProductFilters.tsx   # Bộ lọc sản phẩm (category, price, rating)
-│   └── ProductGrid.types.ts # Props types
-├── forms/
-│   ├── LoginForm.tsx        # Form đăng nhập (username + password + submit)
-│   ├── RegisterForm.tsx     # Form đăng ký
-│   ├── CheckoutForm.tsx     # Form thanh toán
-│   ├── ReviewForm.tsx       # Form đánh giá (modal content)
-│   └── Forms.types.ts       # Props types
-├── modals/
-│   ├── ReviewModal.tsx      # Modal đánh giá (header + form + footer)
-│   ├── ConfirmModal.tsx     # Modal xác nhận generic
-│   └── Modal.types.ts       # Props types
-├── shop-grid/
-│   ├── ShopGrid.tsx         # Grid hiển thị danh sách quán
-│   ├── ShopFilters.tsx      # Bộ lọc quán (location, rating)
-│   └── ShopGrid.types.ts    # Props types
-├── hero-section/
-│   ├── HeroSection.tsx      # Banner hero cấp trang
-│   └── Hero.types.ts        # Props types
-├── featured-section/
-│   ├── FeaturedProducts.tsx # Section sản phẩm nổi bật
-│   ├── FeaturedShops.tsx    # Section quán nổi bật
-│   └── Featured.types.ts    # Props types
-└── index.ts                 # Barrel export
-```
-
-### Ví dụ Organisms
-
-**ProductGrid.tsx:**
-
-```tsx
-"use client";
-
-import ProductCard from "@/components/molecules/cards/ProductCard";
-import { useCart } from "@/lib/cart-context";
-import { MOCK_PRODUCTS } from "@/lib/constants";
-import { useMenu } from "@/lib/menu-context";
-
-import type { ProductGridProps } from "./ProductGrid.types";
-
-export default function ProductGrid({ searchQuery = "" }: ProductGridProps) {
-  const { activeCategory } = useMenu();
-  const { addToCart } = useCart();
-
-  const filtered = MOCK_PRODUCTS.filter((product) => {
-    const matchCategory =
-      activeCategory === "all" || product.category === activeCategory;
-    const matchSearch =
-      product.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
-      product.description.toLowerCase().includes(searchQuery.toLowerCase());
-    return matchCategory && matchSearch;
-  });
-
-  return (
-    <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4">
-      {filtered.map((product) => (
-        <ProductCard
-          key={product.id}
-          product={product}
-          onAddToCart={addToCart}
-        />
-      ))}
-    </div>
-  );
-}
-```
-
----
-
-## 4) TEMPLATES (`components/templates/`)
-
-**Mục đích:** Bố cục cấp trang, cấu trúc nội dung, không có data cụ thể.
-
-Chứa layout và structure của page, nhưng data được truyền từ page component.
-
-### Cấu trúc thư mục
-
-```
-components/templates/
-├── main-layout/
-│   ├── MainLayout.tsx       # Layout chính (header + sidebar + content + footer)
-│   ├── MainLayout.types.ts  # Props types
-│   └── styles.ts            # Responsive grid layout logic
-├── feed-layout/
-│   ├── FeedLayout.tsx       # Layout feed (khám phá quán)
-│   └── FeedLayout.types.ts  # Props types
-├── manager-layout/
-│   ├── ManagerLayout.tsx    # Layout manager dashboard
-│   └── ManagerLayout.types.ts # Props types
-├── checkout-layout/
-│   ├── CheckoutLayout.tsx   # Layout thanh toán (steps, cart, form)
-│   └── CheckoutLayout.types.ts # Props types
-├── auth-layout/
-│   ├── AuthLayout.tsx       # Layout auth (login/register)
-│   └── AuthLayout.types.ts  # Props types
-└── index.ts                 # Barrel export
-```
-
-### Ví dụ Templates
-
-**MainLayout.tsx:**
-
-```tsx
-import Navbar from "@/components/organisms/navigation/Navbar";
-import Footer from "@/layouts/footer";
-import Header from "@/layouts/header";
-
-import type { MainLayoutProps } from "./MainLayout.types";
-
-export default function MainLayout({ children }: MainLayoutProps) {
-  return (
-    <div className="flex min-h-screen flex-col">
-      <Header />
-      <div className="flex flex-1">
-        {/* Sidebar - ẩn trên mobile */}
-        <nav className="hidden w-64 border-r border-[color:var(--color-border)] bg-[color:var(--color-bg-sidebar)] md:block">
-          <Navbar />
-        </nav>
-        {/* Main content */}
-        <main className="flex-1 p-4 md:p-6">{children}</main>
-      </div>
-      <Footer />
-    </div>
-  );
-}
-```
-
----
-
-## 5) PAGES (`app/*/page.tsx`)
-
-**Mục đích:** Các phiên bản cụ thể với dữ liệu thật, logic cấp trang.
-
-Server/client components sử dụng templates, organisms, nhận data từ API/context.
-
-### Ví dụ Pages
-
-**app/(main)/page.tsx:**
-
-```tsx
-"use client";
-
-import FeaturedSection from "@/components/organisms/featured-section/FeaturedSection";
-import ProductGrid from "@/components/organisms/product-grid/ProductGrid";
-import MainLayout from "@/components/templates/main-layout/MainLayout";
-import { useState } from "react";
-
-export default function MainPage() {
-  const [searchQuery, setSearchQuery] = useState("");
-
-  return (
-    <MainLayout>
-      <FeaturedSection />
-      <div className="mt-8">
-        <ProductGrid searchQuery={searchQuery} />
-      </div>
-    </MainLayout>
-  );
-}
-```
-
----
-
-## 6) File Hierarchy Summary
-
-```
-components/
-├── atoms/
-│   ├── buttons/
-│   ├── inputs/
-│   ├── badges/
-│   ├── icons/
-│   ├── typography/
-│   ├── dividers/
-│   ├── loaders/
-│   └── index.ts
-├── molecules/
-│   ├── form-groups/
-│   ├── cards/
-│   ├── ratings/
-│   ├── price-display/
-│   ├── search-bar/
-│   ├── breadcrumb/
-│   ├── tabs/
-│   └── index.ts
-├── organisms/
-│   ├── navigation/
-│   ├── cart/
-│   ├── product-grid/
-│   ├── forms/
-│   ├── modals/
-│   ├── shop-grid/
-│   ├── hero-section/
-│   ├── featured-section/
-│   └── index.ts
-├── templates/
-│   ├── main-layout/
-│   ├── feed-layout/
-│   ├── manager-layout/
-│   ├── checkout-layout/
-│   ├── auth-layout/
-│   └── index.ts
-└── ATOMIC_DESIGN.md (this file)
-```
-
----
-
-## 7) Migration Guide (Old → New)
-
-### Old Structure → New Structure Mapping
-
-| Old File          | New Location                       | Type     |
-| ----------------- | ---------------------------------- | -------- |
-| `CartProduct.tsx` | `molecules/cards/ProductCard.tsx`  | Molecule |
-| `Navbar.tsx`      | `organisms/navigation/Navbar.tsx`  | Organism |
-| `CartFab.tsx`     | `organisms/cart/CartFab.tsx`       | Organism |
-| `ReviewModal.tsx` | `organisms/modals/ReviewModal.tsx` | Organism |
-
-### Migration Steps
-
-1. Create new directory structure under `components/`
-2. Move existing components to appropriate levels (atoms → molecules →
-   organisms)
-3. Extract shared styles/logic into atoms
-4. Update imports in `app/` pages
-5. Test responsiveness at each breakpoint
-6. Update `COMPONENTS.md` with new structure
-
----
-
-## 8) Best Practices
-
-### Atoms Development
-
-- ✅ Reusable across entire project
-- ✅ No business logic
-- ✅ No context/hooks (useAuth, useCart)
-- ✅ Pure props-based
-- ✅ Full TypeScript typing
-- ❌ No "use client" needed (unless interactive, e.g., Button)
-
-### Molecules Development
-
-- ✅ Combines multiple atoms
-- ✅ Simple state (open/close, hover state)
-- ✅ No complex business logic
-- ✅ Can use useState for UI state
-- ✅ Reusable in multiple contexts
-- ❌ No global state (useAuth, useCart)
-
-### Organisms Development
-
-- ✅ Complex UI sections
-- ✅ Can use contexts (useAuth, useCart, useMenu)
-- ✅ Business logic
-- ✅ Always "use client"
-- ✅ Filter, sort, complex interactions
-- ❌ Not reusable across different page types
-
-### Templates Development
-
-- ✅ Page layout structure
-- ✅ Composition of organisms + layout
-- ✅ No data fetching/business logic
-- ✅ Children prop pattern
-- ✅ Props for customization
-- ❌ No hardcoded data
-
-### Pages Development
-
-- ✅ Specific page implementations
-- ✅ Route-specific logic
-- ✅ Data integration
-- ✅ Context usage at page level
-- ✅ State management orchestration
-- ❌ No UI component definitions (use organisms)
-
----
-
-## 9) Import Patterns
-
-### Atoms
-
-```tsx
-import Button from "@/components/atoms/buttons/Button";
-import Text from "@/components/atoms/typography/Text";
-```
-
-### Molecules
-
-```tsx
-import ProductCard from "@/components/molecules/cards/ProductCard";
-import FormField from "@/components/molecules/form-groups/FormField";
-```
-
-### Organisms
-
-```tsx
-import LoginForm from "@/components/organisms/forms/LoginForm";
-import ProductGrid from "@/components/organisms/product-grid/ProductGrid";
-```
-
-### Templates
-
-```tsx
-import MainLayout from "@/components/templates/main-layout/MainLayout";
-```
-
-### Barrel Exports
-
-```tsx
-// Usage
-import { Button, Text } from "@/components/atoms";
-
-// components/atoms/index.ts
-export { default as Button } from "./buttons/Button";
-export { default as Text } from "./typography/Text";
-export * from "./buttons/Button.types";
-```
-
----
-
-## 10) Common Patterns
-
-### Creating a New Atom
-
-```tsx
-// atoms/buttons/NewButton.tsx
-export default function NewButton({ variant, ...props }: Props) {
-  return <button className={styles[variant]} {...props} />;
-}
-
-// atoms/buttons/NewButton.types.ts
-export interface Props extends ButtonHTMLAttributes<HTMLButtonElement> {
-  variant: "type1" | "type2";
-}
-```
-
-### Creating a New Molecule
-
-```tsx
-// molecules/cards/NewCard.tsx
-export default function NewCard({ item, onAction }: Props) {
-  const [hover, setHover] = useState(false);
-  return (
-    <div onMouseEnter={() => setHover(true)}>{/* atoms composition */}</div>
-  );
-}
-```
-
-### Creating a New Organism
-
-```tsx
-// organisms/sections/NewSection.tsx
-"use client";
-
-import ProductCard from "@/components/molecules/cards/ProductCard";
-import { useAuth } from "@/lib/auth-context";
-
-export default function NewSection() {
-  const { user } = useAuth();
-  // business logic, filtering, etc.
-  return <section>{/* molecules composition + logic */}</section>;
-}
-```
-
-### Creating a New Template
-
-```tsx
-// templates/layouts/NewTemplate.tsx
-export default function NewTemplate({ children, header }: Props) {
-  return (
-    <div className="layout">
-      <header>{header}</header>
-      <main>{children}</main>
-    </div>
-  );
-}
-```
-
----
-
-## 11) Testing & Documentation
-
-### For Each Component Level
-
-#### Atoms
-
-- Unit test: Props validation, styling
-- Storybook: All variants, all states
-- Doc: Props interface, usage examples
-
-#### Molecules
-
-- Integration test: Atoms composition
-- Storybook: Different molecule states
-- Doc: Props, behavior, dependencies
-
-#### Organisms
-
-- Integration test: With contexts mocked
-- E2E: User interactions
-- Doc: Logic flow, API integration points
-
-#### Templates
-
-- Layout test: Responsive grid layouts
-- Visual: Desktop/tablet/mobile
-- Doc: Layout structure, breakpoints
-
-#### Pages
-
-- E2E test: Full user flows
-- Performance: Metrics
-- Doc: Route, data flow, features
-
----
-
-## 12) Performance Optimization
-
-### Code Splitting
-
-- Atoms: Always bundled (small, frequently used)
-- Molecules: Bundled by page/feature
-- Organisms: Use `dynamic()` for heavy sections
-- Templates: Bundled by layout type
-- Pages: Automatic splitting by Next.js
-
-### Lazy Loading Example
-
-```tsx
-import dynamic from "next/dynamic";
-
-const ReviewModal = dynamic(
-  () => import("@/components/organisms/modals/ReviewModal"),
-  { loading: () => <Spinner /> },
-);
-```
-
-### Image Optimization
-
-- Use Next.js `Image` component (atoms/molecules)
-- Optimize with `priority` for above-fold
-- Use responsive sizes: `sizes="(max-width: 640px) 100vw, 50vw"`
-
----
-
-## 13) Accessibility
-
-### All Levels
-
-- Semantic HTML: `<button>`, `<a>`, `<form>`, `<nav>`
-- ARIA attributes: `aria-label`, `aria-expanded`, `role`
-- Keyboard navigation: Tab order, focus visible
-- Color contrast: WCAG AA minimum
-- Alt text: All images have meaningful `alt`
-
-### Example
-
-```tsx
-<button
-  aria-label="Add to cart"
-  className="focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
->
-  <CartIcon aria-hidden="true" />
-  Add to Cart
-</button>
-```
-
----
-
-## 14) Version Control & Documentation
-
-### File Format
-
-```
-components/
-├── atoms/
-│   ├── buttons/
-│   │   ├── Button.tsx
-│   │   ├── Button.types.ts
-│   │   └── Button.md  # Component documentation
-│   └── ...
-├── molecules/
-│   ├── cards/
-│   │   ├── ProductCard.tsx
-│   │   ├── Card.types.ts
-│   │   └── ProductCard.md
-│   └── ...
-└── ...
-```
-
-### Documentation Template
-
-```markdown
-# ProductCard
-
-## Purpose
-
-Display individual product with image, name, price, and action button.
-
-## Props
-
-- `product: Product` - Product data
-- `onAddToCart: (product: Product) => void` - Add to cart handler
-
-## Usage
-
-\`\`\`tsx <ProductCard product={item} onAddToCart={addToCart} /> \`\`\`
-
-## Variants
-
-- Image with loading state
-- With discount badge
-- With rating stars
-
-## Responsive
-
-- Mobile: Single column, full width
-- Desktop: Grid layout
-```
-
----
-
-Cấu trúc này cung cấp: ✅ **Scalability**: Dễ thêm components mới ✅
-**Reusability**: Tối đa tái sử dụng ✅ **Maintainability**: Code dễ hiểu, tìm
-kiếm ✅ **Testability**: Mỗi level có logic riêng ✅ **Performance**: Smart
-code-splitting

README.md

@@ -3,6 +3,8 @@
 Dự án Frontend cho hệ thống đặt món cà phê, xây dựng bằng Next.js App Router,
 React 19, TypeScript và Tailwind CSS v4.
 
+_Last Updated: 2026-04-18_
+
 ---
 
 ## Mô Tả Dự Án
@@ -11,7 +13,9 @@ Giao diện người dùng (frontend) cho hệ thống đặt và bán đồ u
 
 ### Tính Năng Hiện Tại
 
-#### 1. **Trang Đăng Nhập & Đăng Ký** (`app/(main)/login`, `app/(main)/register`)
+#### Tính Năng Khách Hàng (Customer Features)
+
+##### 1. **Trang Đăng Nhập & Đăng Ký** (`app/(main)/login`, `app/(main)/register`)
 
 - Form đăng nhập với validation (username, password)
 - Form đăng ký với xác thực OTP
@@ -19,7 +23,7 @@ Giao diện người dùng (frontend) cho hệ thống đặt và bán đồ u
 - Hỗ trợ 3 loại tài khoản: Manager, Staff, Customer
 - Hiển thị thông tin shop trong form
 
-#### 2. **Trang Khám Phá Quán Nước** (`app/(feed)/feed`)
+##### 2. **Trang Khám Phá Quán Nước** (`app/(feed)/feed`)
 
 - Danh sách các quán cà phê
 - Tìm kiếm theo tên quán và địa chỉ
@@ -27,9 +31,7 @@ Giao diện người dùng (frontend) cho hệ thống đặt và bán đồ u
 - Responsive layout (grid 1/2/3 cột)
 - Empty state khi không tìm thấy quán
 
-#### 3. **Trang Chính - Duyệt Thực Đơn** (`app/(main)`)
-
-Dành cho khách hàng:
+##### 3. **Trang Chính - Duyệt Thực Đơn** (`app/(main)`)
 
 - Sidebar collapsible (64px/240px) - danh mục sản phẩm
 - Grid sản phẩm responsive (1-5 cột tuỳ thiết bị)
@@ -38,41 +40,52 @@ Dành cho khách hàng:
 - Lọc tự động theo trạng thái available
 - Mobile menu: scrollable category tabs (< md)
 
-#### 4. **Trang Thanh Toán** (`app/(main)/payment`)
+##### 4. **Trang Thanh Toán** (`app/(main)/payment`)
 
 - Bảng danh sách sản phẩm trong giỏ hàng với điều chỉnh số lượng
 - Invoice aside sticky với tổng giá và nút thanh toán (Tiền mặt, QR)
 - Modal đánh giá 5 sao dành riêng cho khách hàng (ReviewModal)
+- **CashPaymentModal:** nhập tiền mặt, tính tiền thối, báo lỗi nếu tiền không đủ
+- **QRPaymentModal:** tạo mã QR thanh toán (qrcode.react), tự xác nhận sau 5
+  giây đếm ngược
+- **PaymentSuccessModal:** xác nhận thanh toán thành công, tự động xoá giỏ hàng
 
-#### 5. **Hệ Thống Giỏ Hàng** (`lib/cart-context.tsx`)
+##### 5. **Hệ Thống Giỏ Hàng** (`lib/cart-context.tsx`)
 
 - Lưu trữ trạng thái giỏ trong localStorage
 - Thêm/xóa/tăng/giảm số lượng sản phẩm
 - Tính tổng giá và số mặt hàng
 - Persist dữ liệu giữa các session
+- `clearCart()` để xoá toàn bộ giỏ sau thanh toán
 
-#### 6. **Hệ Thống Xác Thực** (`lib/auth-context.tsx`)
+##### 6. **Hệ Thống Xác Thực** (`lib/auth-context.tsx`)
 
 - Quản lý trạng thái người dùng (login/logout/register)
 - Lưu thông tin user trong localStorage
 - Mock auth database với 3 loại tài khoản
 - Hỗ trợ hoàn tất đăng ký qua OTP
 
-#### 7. **Hệ Thống Danh Mục** (`lib/menu-context.tsx`)
+##### 7. **Hệ Thống Danh Mục** (`lib/menu-context.tsx`)
 
 - Chia sẻ trạng thái category giữa Header mobile và Sidebar
 - Tự động clear search khi thay đổi category
 
-#### 8. **Manager Dashboard** (`app/(manager)/manager`)
+#### Tính Năng Quản Lý (Manager Features)
 
-Dành cho quản lý:
+##### 8. **Manager Dashboard** (`app/(manager)/manager`) — ~70% hoàn thành
 
 - Sidebar desktop: Brand, tab navigation (Thực đơn / Combo / Danh mục), link tới
   Analytics
-- CRUD sản phẩm, combo, danh mục qua modals
 - Auth guard: tự động redirect non-manager về `/`
+- **Products tab:** CRUD sản phẩm qua ProductModal, bao gồm:
+  - Upload ảnh sản phẩm với xem trước, nút "Đổi ảnh" và xoá ảnh
+  - Giao diện vùng kéo thả với dashed border
+  - Toggle trạng thái available
+  - Dialog xác nhận xoá
+- **Combos tab:** CRUD combo qua ComboModal, toggle trạng thái, xác nhận xoá
+- **Categories tab:** CRUD danh mục qua CategoryModal, xác nhận xoá
 
-#### 9. **Trang Phân Tích Tài Chính** (`app/(manager)/manager/analytics`)
+##### 9. **Trang Phân Tích Tài Chính** (`app/(manager)/manager/analytics`)
 
 - Summary cards: Doanh thu, đơn hàng, lợi nhuận, giá trị đơn trung bình (so sánh
   kỳ trước)
@@ -81,6 +94,24 @@ Dành cho quản lý:
 - Bảng top 5 sản phẩm và bảng chi tiết có thể sắp xếp
 - Lọc theo danh mục
 
+#### Tính Năng Nhân Viên (Staff Features)
+
+##### 10. **Lịch Làm Việc Nhân Viên** (`app/(staff)/staff/schedule`)
+
+- Xem lịch theo tuần và theo tháng
+- Mobile shift view (danh sách ca theo ngày)
+- Lọc theo phòng ban / bộ phận
+- Modal tạo ca làm việc mới (ShiftCreateModal)
+- Modal xem chi tiết ca (ShiftDetailModal)
+- Auth guard: chỉ staff/manager mới truy cập được
+
+#### Cải Thiện Tiếp Cận (Accessibility)
+
+- Thuộc tính `title` trên các nút icon (tooltip cho screen reader)
+- ARIA roles trên modals: `role="dialog"`, `aria-modal`, `aria-labelledby`
+- Semantic HTML: nhãn form với `htmlFor` đúng chuẩn
+- `alt` text đầy đủ cho ảnh sản phẩm
+
 ---
 
 ## Cách Chạy Dự Án
@@ -144,9 +175,12 @@ frondend/
 |   |   +-- layout.tsx          # Feed layout
 |   |   +-- feed/page.tsx       # Trang khám phá quán nước (/feed)
 |   +-- (manager)/              # Manager route group
-|       +-- layout.tsx          # Manager layout - auth guard + ManagerProvider
-|       +-- manager/page.tsx    # Manager Dashboard (/manager)
-|       +-- manager/analytics/page.tsx  # Financial Analytics (/manager/analytics)
+|   |   +-- layout.tsx          # Manager layout - auth guard + ManagerProvider
+|   |   +-- manager/page.tsx    # Manager Dashboard (/manager)
+|   |   +-- manager/analytics/page.tsx  # Financial Analytics (/manager/analytics)
+|   +-- (staff)/                # Staff route group
+|       +-- layout.tsx          # Staff layout - auth guard
+|       +-- staff/schedule/page.tsx  # Lịch làm việc nhân viên (/staff/schedule)
 +-- components/                 # Atomic Design UI components
 |   +-- atoms/                  # Nguyên tử: Button, Input, Badge, Text...
 |   +-- molecules/              # Phân tử: ProductCard, ShopCard, SearchBar...
@@ -202,8 +236,9 @@ frondend/
 | ---------------- | --------- | ------------------------------------- |
 | Next.js          | 16.1.7    | React Framework (App Router)          |
 | React            | 19.2.3    | Thư viện UI                           |
-| TypeScript       | ^5        | Kiểu dữ liệu tĩnh                     |
+| TypeScript       | ^5.9.3    | Kiểu dữ liệu tĩnh                     |
 | Tailwind CSS     | ^4.2.2    | Utility-first CSS framework           |
+| qrcode.react     | ^4.2.0    | Tạo mã QR thanh toán                  |
 | Geist Font       | -         | Font chữ (Google Fonts via next/font) |
 | FontAwesome      | 6.7.2     | Icon library (CDN)                    |
 | pnpm             | -         | Package manager                       |
@@ -224,14 +259,15 @@ frondend/
 - **Thanh Toán:** `app/(main)/payment/page.tsx`
 - **Manager Dashboard:** `app/(manager)/manager/page.tsx`
 - **Phân Tích Tài Chính:** `app/(manager)/manager/analytics/page.tsx`
+- **Lịch Làm Việc Nhân Viên:** `app/(staff)/staff/schedule/page.tsx`
 
 ### Tài Khoản Demo
 
-| Loại tài khoản | Tên đăng nhập | Mật khẩu      |
-| -------------- | ------------- | ------------- |
-| Manager        | admin         | admin         |
-| Staff          | Nguyễn Văn An | Nguyễn Văn An |
-| Customer       | 0987654321    | user1         |
+| Loại tài khoản | Tên đăng nhập | Mật khẩu / OTP             |
+| -------------- | ------------- | -------------------------- |
+| Manager        | admin         | admin                      |
+| Staff          | Nguyễn Văn An | Nguyễn Văn An              |
+| Customer       | 0987654321    | bất kỳ 6 chữ số (mock OTP) |
 
 ### Design & Styling
 

TODO.md

@@ -1,5 +1,9 @@
 # Coffee Shop Frontend - TODO
 
+_Last Updated: 2026-04-18_
+
+---
+
 ## Completed Features & Implementations
 
 ### A. Dead Code Removed
@@ -37,17 +41,66 @@
 - [x] npm run build - PASSED (Compiled successfully, TypeScript clean, static
       pages generated)
 
+### F. Cart & Payment (Completed)
+
+- [x] Cart checkout flow — cart context with addToCart, removeFromCart,
+      setQuantity, clearCart
+- [x] Payment page implementation (`app/(main)/payment`)
+- [x] CashPaymentModal: cash input, change calculation, insufficient cash error
+- [x] QRPaymentModal: QR code generation via qrcode.react, 5-second countdown
+      auto-confirm
+- [x] PaymentSuccessModal: success confirmation, auto-clears cart
+
+### G. Manager Dashboard — ~70% Complete (In Progress)
+
+- [x] Manager Dashboard page (`app/(manager)/manager/page.tsx`) with auth guard
+- [x] Products tab with CRUD (ProductModal)
+- [x] Image upload in ProductModal: file input, preview, "Đổi ảnh" button,
+      remove button, dashed border drop zone
+- [x] Combos tab with CRUD (ComboModal)
+- [x] Categories tab with CRUD (CategoryModal)
+- [x] Delete confirmation dialogs for all entities
+- [x] Status toggle buttons (available/unavailable)
+- [x] Sidebar navigation with link to Analytics
+
+### H. Financial Analytics Dashboard (Completed)
+
+- [x] Analytics page (`app/(manager)/manager/analytics`)
+- [x] Summary cards: Revenue, Orders, Profit, Average Order Value (with period
+      comparison)
+- [x] Period selector: Day / Week / Month / Year
+- [x] SVG charts: LineChart, BarChart, PieChart with hover tooltips
+- [x] Top 5 products table and sortable detail table
+- [x] Category filter
+
+### I. Staff Shift Schedule (Completed)
+
+- [x] Staff schedule module (`app/(staff)/staff/schedule`)
+- [x] Weekly calendar view
+- [x] Monthly calendar view
+- [x] Mobile shift view (list per day)
+- [x] ShiftCreateModal: create new shifts
+- [x] ShiftDetailModal: view shift details
+- [x] Department/role filtering
+- [x] Auth guard for staff/manager only
+
+### J. Accessibility Improvements (Completed)
+
+- [x] title attributes on icon buttons (tooltips for screen readers)
+- [x] ARIA roles on modals: role="dialog", aria-modal, aria-labelledby
+- [x] Semantic HTML: form labels with correct htmlFor
+- [x] Image alt text for product images
+
 ---
 
 ## Pending Features (Future Work)
 
 ### Cart & Ordering
 
-- [ ] Implement cart checkout flow (app/(main)/cart or modal)
-- [ ] Cart sidebar/modal with item list and total
+- [ ] Cart sidebar/modal with item list and total (quick-access without going to
+      payment page)
 - [ ] Order submission API integration
-- [ ] Payment page implementation (app/(main)/payment)
-- [ ] Order history/tracking page
+- [ ] Order history/tracking page for customers
 - [ ] Toast notifications for cart actions
 
 ### Authentication & User Management
@@ -58,22 +111,22 @@
 - [ ] Password reset/recovery flow
 - [ ] Session management and token refresh
 
-### Manager Features
+### Manager Features (Remaining ~30%)
 
-- [ ] Manager dashboard page (app/(manager)/page.tsx)
-- [ ] Product management (add/edit/delete)
-- [ ] Category management
-- [ ] Order management & tracking
-- [ ] Sales analytics/dashboard
-- [ ] Inventory management
+- [ ] Order management & tracking for manager
+- [ ] Inventory management beyond available toggle (stock counts, low-stock
+      alerts)
+- [ ] Staff management tab in Manager Dashboard
+- [ ] Shift approval workflow (manager approves staff shift requests)
 
 ### Backend Integration
 
 - [ ] Replace MOCK_PRODUCTS with API calls (GET /api/products)
 - [ ] Replace MOCK_SHOPS with API calls (GET /api/shops)
 - [ ] Replace MOCK_USERS with real authentication (POST /api/auth/login)
-- [ ] Real product images (replace placeholder.jpg)
-- [ ] Image upload for products
+- [ ] Real product images hosted on server/CDN (replace public/imgs/products/)
+- [ ] Real analytics data from backend (GET /api/analytics)
+- [ ] Real shift/schedule data from backend
 
 ### UX Improvements
 
@@ -85,11 +138,12 @@
 - [ ] Filter by price range
 - [ ] Quantity selector in product card
 - [ ] Related products suggestions
+- [ ] Push notifications for order status updates
 
 ### Performance & SEO
 
-- [ ] Dynamic route generation for products (app/(main)/product/[id]/page.tsx)
-- [ ] Dynamic route generation for shops (app/(feed)/shop/[id]/page.tsx)
+- [ ] Dynamic route generation for products (`app/(main)/product/[id]/page.tsx`)
+- [ ] Dynamic route generation for shops (`app/(feed)/shop/[id]/page.tsx`)
 - [ ] Meta tags and Open Graph for SEO
 - [ ] Image optimization and lazy loading
 - [ ] Code splitting and dynamic imports
@@ -97,7 +151,7 @@
 ### Accessibility & Testing
 
 - [ ] Keyboard navigation testing
-- [ ] ARIA labels audit
-- [ ] Unit tests for contexts
-- [ ] E2E tests for user flows
-- [ ] Accessibility audit (WCAG 2.1 AA)
+- [ ] Full ARIA labels audit (WCAG 2.1 AA)
+- [ ] Unit tests for contexts (auth, cart, menu, manager)
+- [ ] E2E tests for user flows (checkout, login, manager CRUD)
+- [ ] Accessibility audit tool (axe, Lighthouse)

app/(main)/page.tsx

@@ -56,15 +56,18 @@ export default function Home() {
         <div className="mb-5 flex flex-col justify-between gap-3 sm:flex-row sm:items-center">
           {/* Title + count */}
           <div className="shrink-0">
-            <h2 className="text-foreground text-xl font-bold">
+            <h1 className="text-foreground text-xl font-bold">
               {activeCategoryLabel}
-            </h2>
+            </h1>
           </div>
 
           {/* Search bar */}
           <SearchBar
             value={searchQuery}
-            onChange={setSearchQuery}
+            onChange={(q) => {
+              if (q && activeCategory !== "all") setActiveCategory("all");
+              setSearchQuery(q);
+            }}
             onClear={() => setSearchQuery("")}
             placeholder="Tìm kiếm món..."
             className="sm:max-w-xs"

app/(main)/payment/page.tsx

@@ -2,10 +2,8 @@
 
 import Button from "@/components/atoms/buttons/Button";
 import PaymentSummaryCard from "@/components/molecules/cards/PaymentSummaryCard";
-import ReviewModal from "@/components/organisms/modals/ReviewModal";
 import { useAuth } from "@/lib/auth-context";
 import { useCart } from "@/lib/cart-context";
-import { useState } from "react";
 
 const formatPrice = (value: number) =>
   value.toLocaleString("vi-VN", { style: "currency", currency: "VND" });
@@ -21,9 +19,6 @@ export default function PaymentPage() {
   } = useCart();
   const { user } = useAuth();
 
-  const [isReviewOpen, setIsReviewOpen] = useState(false);
-  const isCustomer = user?.role === "customer";
-
   return (
     <div>
       <div className="mx-auto w-full max-w-screen-2xl px-4 py-6 md:px-6 md:py-8 lg:px-8">
@@ -45,13 +40,22 @@ export default function PaymentPage() {
                   <table className="w-full min-w-190 text-sm">
                     <thead>
                       <tr className="bg-(--color-border-light)/40 text-left">
-                        <th className="px-4 py-3 font-semibold">
+                        <th scope="col" className="px-4 py-3 font-semibold">
                           Tên sản phẩm
                         </th>
-                        <th className="px-4 py-3 font-semibold">Giá tiền</th>
-                        <th className="px-4 py-3 font-semibold">Mô tả</th>
-                        <th className="px-4 py-3 font-semibold">Số lượng</th>
-                        <th className="px-4 py-3 text-right font-semibold">
+                        <th scope="col" className="px-4 py-3 font-semibold">
+                          Giá tiền
+                        </th>
+                        <th scope="col" className="px-4 py-3 font-semibold">
+                          Mô tả
+                        </th>
+                        <th scope="col" className="px-4 py-3 font-semibold">
+                          Số lượng
+                        </th>
+                        <th
+                          scope="col"
+                          className="px-4 py-3 text-right font-semibold"
+                        >
                           Xóa
                         </th>
                       </tr>
@@ -105,6 +109,7 @@ export default function PaymentPage() {
                               variant="danger"
                               size="md"
                               style="payment"
+                              aria-label={`Xóa ${item.name} khỏi giỏ hàng`}
                             >
                               Xóa sản phẩm
                             </Button>
@@ -119,17 +124,13 @@ export default function PaymentPage() {
           </section>
 
           <PaymentSummaryCard
+            cartItems={items}
             totalPrice={totalPrice}
-            isCustomer={isCustomer}
+            role={user?.role ?? "customer"}
             backHref="/"
           />
         </div>
       </div>
-
-      <ReviewModal
-        isOpen={isReviewOpen}
-        onClose={() => setIsReviewOpen(false)}
-      />
     </div>
   );
 }

app/(manager)/manager/analytics/page.tsx

@@ -299,6 +299,7 @@ export default function AnalyticsPage() {
             <>
               <p className="mb-3 text-xs text-(--color-text-muted)">
                 Doanh thu theo thời gian — {PERIOD_LABELS[period]}
+                <span className="ml-2 opacity-70">(tr = triệu đồng VND)</span>
               </p>
               <LineChart data={revenueData} height={220} />
             </>
@@ -307,6 +308,7 @@ export default function AnalyticsPage() {
             <>
               <p className="mb-3 text-xs text-(--color-text-muted)">
                 So sánh doanh thu nửa đầu và nửa sau kỳ hiện tại
+                <span className="ml-2 opacity-70">(tr = triệu đồng VND)</span>
               </p>
               <BarChart
                 current={barCurrent}

app/(manager)/manager/page.tsx

@@ -57,7 +57,7 @@ export default function ManagerPage() {
             <button
               key={tab.id}
               onClick={() => setActiveTab(tab.id)}
-              className={`flex w-full cursor-pointer items-center gap-3 rounded-xl border-none px-3 py-2.5 text-sm font-medium transition-all ${
+              className={`flex w-full cursor-pointer items-center gap-3 rounded-xl border-none px-3 py-2.5 text-sm font-medium transition-all focus-visible:ring-2 focus-visible:ring-(--color-primary)/50 focus-visible:outline-none ${
                 activeTab === tab.id
                   ? "bg-(--color-primary) text-white shadow-sm"
                   : "hover:bg-background bg-transparent text-(--color-text-secondary) hover:text-(--color-primary-dark)"
@@ -82,7 +82,7 @@ export default function ManagerPage() {
             </p>
             <Link
               href="/manager/analytics"
-              className="hover:bg-background flex w-full items-center gap-3 rounded-xl px-3 py-2.5 text-sm font-medium text-(--color-text-secondary) no-underline transition-all hover:text-(--color-primary-dark)"
+              className="hover:bg-background flex w-full items-center gap-3 rounded-xl px-3 py-2.5 text-sm font-medium text-(--color-text-secondary) no-underline transition-all hover:text-(--color-primary-dark) focus-visible:ring-2 focus-visible:ring-(--color-primary)/50 focus-visible:outline-none"
             >
               <i className="fa-solid fa-chart-line w-4 text-center"></i>
               <span className="flex-1 text-left">Tài chính</span>
@@ -92,7 +92,7 @@ export default function ManagerPage() {
             </Link>
             <Link
               href="/staff/schedule"
-              className="hover:bg-background flex w-full items-center gap-3 rounded-xl px-3 py-2.5 text-sm font-medium text-(--color-text-secondary) no-underline transition-all hover:text-(--color-primary-dark)"
+              className="hover:bg-background flex w-full items-center gap-3 rounded-xl px-3 py-2.5 text-sm font-medium text-(--color-text-secondary) no-underline transition-all hover:text-(--color-primary-dark) focus-visible:ring-2 focus-visible:ring-(--color-primary)/50 focus-visible:outline-none"
             >
               <i className="fa-solid fa-calendar-days w-4 text-center"></i>
               <span className="flex-1 text-left">Ca làm</span>
@@ -125,7 +125,7 @@ export default function ManagerPage() {
             </Link>
             <button
               onClick={logout}
-              className="flex flex-1 cursor-pointer items-center justify-center gap-1.5 rounded-xl border-none bg-transparent py-2 text-xs font-medium text-red-500 transition hover:bg-red-50"
+              className="flex flex-1 cursor-pointer items-center justify-center gap-1.5 rounded-xl border-none bg-transparent py-2 text-xs font-medium text-red-500 transition hover:bg-red-50 focus-visible:ring-2 focus-visible:ring-red-400/50 focus-visible:outline-none"
             >
               <i className="fa-solid fa-right-from-bracket"></i>
               Đăng xuất
@@ -158,7 +158,7 @@ export default function ManagerPage() {
               <button
                 key={tab.id}
                 onClick={() => setActiveTab(tab.id)}
-                className={`flex cursor-pointer items-center gap-1.5 rounded-xl border-none px-3 py-2 text-xs font-medium transition ${
+                className={`flex cursor-pointer items-center gap-1.5 rounded-xl border-none px-3 py-2 text-xs font-medium transition focus-visible:ring-2 focus-visible:ring-(--color-primary)/50 focus-visible:outline-none ${
                   activeTab === tab.id
                     ? "bg-(--color-primary) text-white"
                     : "bg-background text-(--color-text-secondary) hover:text-(--color-primary)"

app/APP.md

@@ -24,12 +24,16 @@ app/
 │   ├── layout.tsx             # Feed layout
 │   └── feed/
 │       └── page.tsx           # Trang khám phá quán (/feed)
-└── (manager)/
-    ├── layout.tsx             # Manager layout - auth guard + ManagerProvider
-    └── manager/
-        ├── page.tsx           # Manager Dashboard - quản lý thực đơn (/manager)
-        └── analytics/
-            └── page.tsx       # Financial Analytics (/manager/analytics)
+├── (manager)/
+│   ├── layout.tsx             # Manager layout - auth guard + ManagerProvider
+│   └── manager/
+│       ├── page.tsx           # Manager Dashboard - quản lý thực đơn (/manager)
+│       └── analytics/
+│           └── page.tsx       # Financial Analytics (/manager/analytics)
+└── (staff)/
+    └── staff/
+        └── schedule/
+            └── page.tsx       # Staff Shift Schedule (/staff/schedule)
 ```
 
 ---
@@ -241,7 +245,7 @@ registration flow. Two-step process: phone verification → account creation.
 
 **Route:** `/payment` **Type:** Client component **Description:**
 Payment/checkout page. Shows cart items in a table with quantity controls and a
-summary aside with payment actions.
+summary aside (PaymentSummaryCard) with payment actions and modal flows.
 
 #### Key Features
 
@@ -251,27 +255,46 @@ summary aside with payment actions.
   - Empty state message when cart is empty
   - Horizontal scroll on small screens (min-w-190)
 
-- **Invoice Aside:**
+- **PaymentSummaryCard (Invoice Aside):**
   - Sticky on desktop (top offset = header height + 1rem)
-  - Shows total price
-  - Payment buttons: Tiền mặt, QR Code (UI-only; trigger review modal for
-    customers)
+  - Shows all cart items with subtotals and grand total
+  - Payment method buttons: Tiền mặt (Cash), QR Code
   - **"Đánh giá" button** — only visible when `user.role === "customer"`; opens
     ReviewModal
   - **"Quay về" button** — links back to `/`; spans full width when review
     button is absent
 
-- **Review Modal (ReviewModal):**
-  - Opened when a customer clicks "Đánh giá" OR clicks a payment button (Tiền
-    mặt/QR)
-  - Closed via "Quay lại" button, backdrop click, or after submitting and
-    closing
+#### Payment Modal Flow
+
+- **Cash Payment (CashPaymentModal):**
+  - Opened when user clicks "Tiền mặt"
+  - Input: cash received amount
+  - Shows change due or insufficient cash error inline
+  - Displays invoice item list
+  - Confirm → opens PaymentSuccessModal
+
+- **QR Payment (QRPaymentModal):**
+  - Opened when user clicks "QR Code"
+  - Generates QR code via `qrcode.react` (`QRCodeSVG` component)
+  - 5-second countdown timer — auto-confirms on expiry
+  - Displays invoice item list
+  - Confirm → opens PaymentSuccessModal
+
+- **PaymentSuccessModal:**
+  - Shown after confirming Cash or QR payment
+  - Displays success confirmation message
+  - Clears cart via `clearCart()` from CartContext on close/confirm
+
+- **ReviewModal:**
+  - Opened when a customer clicks "Đánh giá"
+  - 5-star rating + textarea for comment
+  - Closed via "Quay lại" button, backdrop click, or after submitting
   - See `components/ReviewModal.tsx` for full documentation
 
 #### Context Usage
 
 - **useCart()** — items, totalPrice, increaseQty, decreaseQty, removeFromCart,
-  setQuantity
+  setQuantity, clearCart
 - **useAuth()** — user (to check `user.role === "customer"` for review button
   visibility)
 
@@ -279,6 +302,9 @@ summary aside with payment actions.
 
 ```tsx
 isReviewOpen: boolean; // Controls ReviewModal visibility
+isCashModalOpen: boolean; // Controls CashPaymentModal visibility
+isQRModalOpen: boolean; // Controls QRPaymentModal visibility
+isSuccessModalOpen: boolean; // Controls PaymentSuccessModal visibility
 isCustomer: boolean; // Derived from user.role === "customer"
 ```
 
@@ -502,13 +528,78 @@ categoryFilter: string; // category id or "all"
 
 ---
 
+## (staff) Route Group
+
+### Layout
+
+**Description:** Route group for staff-specific pages. Uses `StaffLayout` from
+`components/templates/staff-layout/` which provides the staff navigation shell.
+
+---
+
+### Staff Shift Schedule (app/(staff)/staff/schedule/page.tsx)
+
+**Route:** `/staff/schedule` **Type:** Client component **Description:** Weekly
+and monthly shift schedule management for staff members.
+
+#### Key Features
+
+- **Weekly Schedule View (WeeklySchedule.tsx):**
+  - Grid-based view of shifts for each day of the current week
+  - Shows shift time, role, and department per cell
+  - Click a shift to open ShiftDetailModal
+
+- **Monthly Calendar View (MonthlyCalendar.tsx):**
+  - Full month calendar grid
+  - Shifts rendered as colored chips per day
+  - Navigate between months
+
+- **Mobile Shift View (MobileShiftView.tsx):**
+  - Optimized list-based view for small screens
+  - Shows upcoming shifts for the current/selected date
+
+- **ShiftCreateModal:**
+  - Form to create a new shift: date, start/end time, role, department
+  - Validates time range before submitting
+
+- **ShiftDetailModal:**
+  - Shows full details of a selected shift
+  - Options to edit or delete the shift
+
+- **Department Filter:**
+  - Dropdown to filter schedule view by department
+
+#### Context Usage
+
+- **useShift()** (lib/shift-context.tsx) — shifts, createShift, updateShift,
+  deleteShift, selectedDate, setSelectedDate
+
+#### State Management
+
+```tsx
+activeView: "weekly" | "monthly"; // Toggle between calendar views
+isCreateModalOpen: boolean; // Controls ShiftCreateModal
+selectedShift: Shift | null; // Shift passed to ShiftDetailModal
+departmentFilter: string; // Currently selected department
+```
+
+#### Responsive Behavior
+
+- **Mobile (<768px):** MobileShiftView displayed instead of grid calendars
+- **Tablet/Desktop (768px+):** WeeklySchedule or MonthlyCalendar displayed
+- **Department filter:** Sticky top bar on all screen sizes
+
+---
+
 ## Future Enhancements
 
 - [x] Payment page implementation
 - [x] Customer review modal (ReviewModal) with 5-star rating + textarea
 - [x] Manager dashboard (menu management)
 - [x] Financial Analytics dashboard (charts, profit analysis)
+- [x] Staff shift schedule (weekly/monthly views, CRUD, department filter)
+- [x] Cash and QR payment modals with invoice display
+- [x] Image upload for products in manager dashboard
 - [ ] Order history/tracking page
 - [ ] User profile page
-- [ ] Cart checkout flow
 - [ ] Real backend API integration

components/COMPONENTS.md

@@ -7,14 +7,31 @@
 
 ```
 components/
-├── atoms/           # Basic building blocks (Button, Input, Text, Badge...)
-├── molecules/       # Groups of atoms (ProductCard, SearchBar...)
-├── organisms/       # Complex UI sections (CategorySidebar, CartFab, ProductGrid, ReviewModal, analytics charts...)
-└── templates/       # Page layout structures (MainLayout, AuthLayout...)
+├── atoms/           # Basic building blocks — 14 atoms (Button, Input, Text, Badge...) — see atoms/ATOMS.md
+├── molecules/       # Groups of atoms — 5 molecules (ProductCard, ShopCard, ShiftCard, SearchBar, PaymentSummaryCard)
+├── organisms/       # Complex UI sections — 27 organisms (analytics, cart, forms, manager, modals, navigation, grids, shift-schedule)
+└── templates/       # Page layout structures — 5 templates (MainLayout, AuthLayout, FeedLayout, ManagerLayout, StaffLayout)
 ```
 
 ---
 
+## ATOMS
+
+See [`atoms/ATOMS.md`](atoms/ATOMS.md) for full atom documentation (14 atoms).
+
+**Summary of atom groups:**
+
+| Folder      | Atoms                                        |
+| ----------- | -------------------------------------------- |
+| buttons/    | Button, IconButton                           |
+| inputs/     | TextInput, SearchInput, Textarea, LoginInput |
+| typography/ | Heading, Text, Caption                       |
+| badges/     | Badge, PriceBadge                            |
+| dividers/   | Divider                                      |
+| errors/     | ErrorMessageLogin                            |
+
+---
+
 ## MOLECULES
 
 ### ProductCard (`molecules/cards/ProductCard.tsx`)
@@ -25,16 +42,58 @@ parent grid (w-full).
 
 **Atomic level:** Molecule (composed of Button, Caption, Text atoms)
 
+---
+
 ### ShopCard (`molecules/cards/ShopCard.tsx`)
 
 **Description:** Shop discovery card. Displays shop image, name, address, and a
 link to the menu.
 
+**Atomic level:** Molecule
+
+---
+
+### ShiftCard (`molecules/cards/ShiftCard.tsx`)
+
+**Description:** Card displaying a single shift slot. Shows start/end time,
+duration, wage, status badge, and registered staff list. Supports a compact mode
+for use in calendar grids.
+
+**Atomic level:** Molecule
+
+**Props:**
+
+```ts
+interface ShiftCardProps {
+  shift: ShiftSlot; // Shift slot data (status, times, staff, etc.)
+  compact?: boolean; // Compact mode for calendar cells (default: false)
+  onClick?: (shift: ShiftSlot) => void; // Click handler
+}
+```
+
+**Status variants:** `available` (blue), `registered` (dark blue),
+`approved_leave` (purple), `absent` (red)
+
+**Used in:** `WeeklySchedule`, `MobileShiftView`, `MonthlyCalendar`
+
+---
+
 ### SearchBar (`molecules/search-bar/SearchBar.tsx`)
 
 **Description:** Search input with clear button. Controlled component — value
 and onChange come from parent.
 
+**Atomic level:** Molecule (wraps SearchInput atom)
+
+---
+
+### PaymentSummaryCard (`molecules/cards/PaymentSummaryCard.tsx`)
+
+**Description:** Summary card displayed on the payment page. Shows cart items,
+subtotal, and payment method selection. Triggers cash or QR payment modals.
+
+**Atomic level:** Molecule
+
 ---
 
 ## ORGANISMS
@@ -44,25 +103,35 @@ and onChange come from parent.
 **Description:** Left sidebar with collapsible category filter. Sticky below
 header, full viewport height minus header.
 
+---
+
 ### CartFab (`organisms/cart/CartFab.tsx`)
 
 **Description:** Floating Action Button displaying cart item count. Links to
 /payment page.
 
+---
+
 ### ProductGrid (`organisms/product-grid/ProductGrid.tsx`)
 
 **Description:** Full product grid organism with mobile category tabs,
 filtering, and empty state. Uses useCart and useMenu contexts.
 
+---
+
 ### ShopGrid (`organisms/shop-grid/ShopGrid.tsx`)
 
 **Description:** Responsive grid of ShopCard molecules for the feed/discovery
 page.
 
-### ReviewModal (`organisms/modals/ReviewModal.tsx`)
+---
 
-**Description:** Modal for customer reviews. Shows 5-star rating and textarea.
-After submission, displays thank-you message.
+### LoginForm (`organisms/forms/LoginForm.tsx`)
+
+**Description:** Login form organism. Uses LoginInput and ErrorMessageLogin
+atoms. Handles admin/staff/customer login flows via useAuth context.
+
+---
 
 ### Analytics Charts (`organisms/analytics/`)
 
@@ -81,6 +150,101 @@ dashboard. All components are interactive with hover tooltips.
 
 ---
 
+### Manager Organisms (`organisms/manager/`)
+
+Components for the manager dashboard product/category/combo management.
+
+| Component        | File              | Description                                             |
+| ---------------- | ----------------- | ------------------------------------------------------- |
+| CategoriesTab    | CategoriesTab.tsx | Category list with add/edit/delete actions              |
+| CategoryModal    | CategoryModal.tsx | Modal form to create/edit a category                    |
+| ComboModal       | ComboModal.tsx    | Modal form to create/edit a combo                       |
+| CombosTab        | CombosTab.tsx     | Combo list with add/edit/delete actions                 |
+| DeleteConfirm    | DeleteConfirm.tsx | Generic delete confirmation dialog                      |
+| ProductModal     | ProductModal.tsx  | Modal form to create/edit a product (with image upload) |
+| ProductsTab      | ProductsTab.tsx   | Product list with add/edit/delete actions               |
+| StatusBadge      | StatusBadge.tsx   | Badge showing active/inactive status                    |
+| Manager.types.ts | Manager.types.ts  | Shared TypeScript interfaces for manager components     |
+
+---
+
+### Modals (`organisms/modals/`)
+
+| Component           | File                    | Description                                               |
+| ------------------- | ----------------------- | --------------------------------------------------------- |
+| ReviewModal         | ReviewModal.tsx         | 5-star rating and textarea review submission modal        |
+| CashPaymentModal    | CashPaymentModal.tsx    | Cash payment — input received amount, calculate change    |
+| QRPaymentModal      | QRPaymentModal.tsx      | QR code payment — generates QR, 5s countdown auto-confirm |
+| PaymentSuccessModal | PaymentSuccessModal.tsx | Success screen — auto-redirects to home after 1 second    |
+| Modal.types.ts      | Modal.types.ts          | Shared TypeScript interfaces for all modal components     |
+
+#### CashPaymentModal
+
+**Props:**
+
+```ts
+interface CashPaymentModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => void;
+  items: InvoiceItem[]; // { name, quantity, price }[]
+  totalAmount: number;
+}
+```
+
+- ARIA: `role="dialog"`, `aria-modal="true"`,
+  `aria-labelledby="cash-modal-title"`
+- Shows invoice list, cash received input, change due calculation, insufficient
+  cash error
+
+#### QRPaymentModal
+
+**Props:**
+
+```ts
+interface QRPaymentModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => void;
+  items: InvoiceItem[];
+  totalAmount: number;
+}
+```
+
+- Uses `qrcode.react` (`QRCodeSVG`) to render a QR code
+- 5-second countdown timer — auto-calls `onConfirm` when it reaches 0
+- ARIA: `role="dialog"`, `aria-modal="true"`, `aria-labelledby="qr-modal-title"`
+
+#### PaymentSuccessModal
+
+**Props:**
+
+```ts
+interface PaymentSuccessModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+}
+```
+
+- Auto-redirects to `/` after 1 second via `useRouter`
+- ARIA: `role="dialog"`, `aria-modal="true"`
+
+---
+
+### Shift Schedule (`organisms/shift-schedule/`)
+
+Components for the staff shift scheduling feature.
+
+| Component        | File                 | Description                                           |
+| ---------------- | -------------------- | ----------------------------------------------------- |
+| WeeklySchedule   | WeeklySchedule.tsx   | Weekly calendar grid showing shifts per day           |
+| MonthlyCalendar  | MonthlyCalendar.tsx  | Monthly calendar view with shift indicators per day   |
+| MobileShiftView  | MobileShiftView.tsx  | Mobile-optimized list/card view of shifts             |
+| ShiftCreateModal | ShiftCreateModal.tsx | Form modal for registering for or creating a shift    |
+| ShiftDetailModal | ShiftDetailModal.tsx | Detail view of a shift with its registered staff list |
+
+---
+
 ## TEMPLATES
 
 ### MainLayout (`templates/main-layout/MainLayout.tsx`)
@@ -102,6 +266,11 @@ login/register pages.
 **Description:** Manager layout template — auth guard + ManagerProvider. Used by
 the manager route group.
 
+### StaffLayout (`templates/staff-layout/`)
+
+**Description:** Staff layout template — wraps staff-facing pages (shift
+schedule, etc.). Used by the staff route group.
+
 ---
 
 ## Contexts Documentation
@@ -125,3 +294,7 @@ mobile menu and CategorySidebar selection.
 
 Manages menu CRUD state (products, combos, categories) for the manager
 dashboard.
+
+---
+
+**Last Updated:** 2026-04-18

components/atoms/ATOMS.md

@@ -1,7 +1,7 @@
 # Atoms Components Library
 
-**Status:** ✅ Phase 1 Implementation Complete **Created:** 2026-04-03
-**Foundation:** Atomic Design Pattern
+**Status:** ✅ Complete — 14 atoms **Created:** 2026-04-03 **Foundation:**
+Atomic Design Pattern
 
 ---
 
@@ -22,7 +22,7 @@ potentially other atoms).
 
 ---
 
-## 🎯 Atoms Created
+## 🎯 Atoms Created (14 total)
 
 ### Buttons (`buttons/`)
 
@@ -181,6 +181,58 @@ import { Textarea } from "@/components/atoms";
 
 ---
 
+#### **LoginInput.tsx**
+
+Specialized input for the login form. Supports username/phone and password
+fields. Password fields include a built-in show/hide toggle button. Displays a
+user icon on desktop viewports.
+
+**Props:**
+
+```ts
+interface LoginInputProps extends InputHTMLAttributes<HTMLInputElement> {
+  label: string; // Field label (rendered as <label>)
+  type: string; // Input type — "text" | "password"
+  name: string; // Input id and name (used for label htmlFor)
+  value: string; // Controlled value
+  errors?: string; // Error string — adds red border when set
+  onChange: (e: React.ChangeEvent<HTMLInputElement>) => void;
+}
+```
+
+**Usage:**
+
+```tsx
+import LoginInput from "@/components/atoms/inputs/LoginInput";
+
+<LoginInput
+  label="Tên đăng nhập"
+  type="text"
+  name="username"
+  value={username}
+  errors={errors.username}
+  onChange={(e) => setUsername(e.target.value)}
+/>
+
+<LoginInput
+  label="Mật khẩu"
+  type="password"
+  name="password"
+  value={password}
+  errors={errors.password}
+  onChange={(e) => setPassword(e.target.value)}
+/>
+```
+
+**Notes:**
+
+- Password type shows a show/hide toggle button (ARIA-labelled)
+- Desktop: renders a `fa-user` icon at left via `lg:block`
+- Error state: red border via `border-red-400` when `errors` is set
+- Used in: `LoginForm.tsx`
+
+---
+
 ### Typography (`typography/`)
 
 #### **Heading.tsx**
@@ -346,6 +398,50 @@ import { Divider } from "@/components/atoms";
 
 ---
 
+### Errors (`errors/`)
+
+#### **ErrorMessageLogin.tsx**
+
+Displays error messages in the login form. Two visual styles controlled by the
+`type` prop: a prominent alert box (`primary`) and a compact inline message
+(`secondary`). Both include a `fa-circle-exclamation` icon.
+
+**Props:**
+
+```ts
+interface ErrorMessageLoginProps {
+  message: string; // Error message text to display
+  type?: string; // "primary" (default) | "secondary"
+}
+```
+
+**Variants:**
+
+- `primary` (default): Rounded alert box — red border, red-50 background,
+  `text-red-600`, `text-sm`. Used for form-level errors (e.g. wrong password).
+- `secondary`: Inline paragraph — `text-red-500`, `text-xs`. Used for
+  field-level errors below individual inputs.
+
+**Usage:**
+
+```tsx
+import ErrorMessageLogin from "@/components/atoms/errors/ErrorMessageLogin";
+
+{
+  /* Form-level error */
+}
+<ErrorMessageLogin message="Tên đăng nhập hoặc mật khẩu không đúng" />;
+
+{
+  /* Field-level inline error */
+}
+<ErrorMessageLogin message="Vui lòng nhập mật khẩu" type="secondary" />;
+```
+
+**Used in:** `LoginForm.tsx`
+
+---
+
 ## 🎨 Theming
 
 All atoms use CSS variables for consistent theming:
@@ -378,7 +474,8 @@ Change one variable in `globals.css` to update all atoms across the app.
 import { Badge, PriceBadge } from "@/components/atoms/badges";
 import { Button } from "@/components/atoms/buttons";
 import { Divider } from "@/components/atoms/dividers";
-import { SearchInput, TextInput } from "@/components/atoms/inputs";
+import ErrorMessageLogin from "@/components/atoms/errors/ErrorMessageLogin";
+import { LoginInput, SearchInput, TextInput } from "@/components/atoms/inputs";
 import { Caption, Heading, Text } from "@/components/atoms/typography";
 ```
 
@@ -400,6 +497,9 @@ import {
 } from "@/components/atoms";
 ```
 
+> Note: `ErrorMessageLogin` and `LoginInput` are imported directly from their
+> subfolders as they are auth-specific and not re-exported from the root barrel.
+
 ### Type Imports
 
 ```tsx
@@ -483,50 +583,46 @@ All atoms include:
 
 ```
 components/atoms/
-├── buttons/
-│   ├── Button.tsx
-│   ├── Button.types.ts
-│   ├── IconButton.tsx
-│   └── index.ts
-├── inputs/
-│   ├── TextInput.tsx
-│   ├── SearchInput.tsx
-│   ├── Textarea.tsx
-│   ├── Input.types.ts
-│   └── index.ts
-├── typography/
-│   ├── Heading.tsx
-│   ├── Text.tsx
-│   ├── Caption.tsx
-│   ├── Typography.types.ts
-│   └── index.ts
 ├── badges/
 │   ├── Badge.tsx
 │   ├── Badge.types.ts
 │   ├── PriceBadge.tsx
 │   └── index.ts
+├── buttons/
+│   ├── Button.tsx
+│   ├── Button.types.ts
+│   ├── IconButton.tsx
+│   └── index.ts
 ├── dividers/
 │   ├── Divider.tsx
 │   └── index.ts
+├── errors/                   ← auth error display
+│   ├── Error.types.ts
+│   └── ErrorMessageLogin.tsx
+├── inputs/
+│   ├── Input.types.ts
+│   ├── LoginInput.tsx        ← auth-specific input
+│   ├── SearchInput.tsx
+│   ├── Textarea.tsx
+│   ├── TextInput.tsx
+│   └── index.ts
+├── typography/
+│   ├── Caption.tsx
+│   ├── Heading.tsx
+│   ├── Text.tsx
+│   ├── Typography.types.ts
+│   └── index.ts
 ├── index.ts (barrel export)
 └── ATOMS.md (this file)
 ```
 
 ---
 
-## 🚀 Next Steps
+## 🚀 Status
 
-Once atoms are comfortable, the next phase is creating **Molecules** -
-combinations of atoms:
-
-- **ProductCard** - Image + Text + Badge + Button
-- **FormField** - Label + Input + Error Text
-- **SearchBar** - SearchInput + Button
-- **RatingInput** - Interactive 5-star rating
-- **PriceTag** - Price display with formatting
-- And more...
-
-See `OPTIMIZATION_PLAN.md` for the full roadmap.
+Atoms are stable and in use across molecules and organisms. Molecules are
+implemented — see `components/COMPONENTS.md` for details. See
+`OPTIMIZATION_PLAN.md` for the full roadmap.
 
 ---
 
@@ -540,5 +636,5 @@ See `OPTIMIZATION_PLAN.md` for the full roadmap.
 
 ---
 
-**Status:** ✅ Complete & Ready for Use **Last Updated:** 2026-04-03 **Phase:**
-1 of 5
+**Status:** ✅ Complete & Ready for Use **Last Updated:** 2026-04-18 **Atoms:**
+14

components/atoms/buttons/Button.tsx

@@ -8,6 +8,7 @@ export default function Button({
   size = "md",
   icon,
   iconPosition = "left",
+  className = "",
   disabled = false,
   children,
   ...props
@@ -43,7 +44,7 @@ export default function Button({
 
   return (
     <button
-      className={`${styles[style]} ${variants[variant]} ${sizes[size]}`}
+      className={`${styles[style]} ${variants[variant]} ${sizes[size]} ${className}`}
       disabled={disabled}
       {...props}
     >

components/atoms/buttons/Button.types.ts

@@ -15,6 +15,7 @@ export interface ButtonProps extends Omit<
   size?: "sm" | "md" | "lg";
   icon?: string; // FontAwesome class like "fa-solid fa-cart-plus"
   iconPosition?: "left" | "right";
+  className?: string;
   disabled?: boolean;
   children: React.ReactNode;
 }

components/atoms/inputs/SearchInput.tsx

@@ -21,9 +21,11 @@ export default function SearchInput({
       />
       {value && onClear && (
         <button
+          title="Xóa"
           type="button"
           onClick={onClear}
           className="absolute top-1/2 right-3 -translate-y-1/2 text-(--color-text-muted) transition-colors hover:text-(--color-primary)"
+          aria-label="Xóa"
         >
           <i className="fa-solid fa-xmark text-sm"></i>
         </button>

components/atoms/inputs/TextInput.tsx

@@ -24,6 +24,7 @@ export default function TextInput({
         />
         {icon && (
           <button
+            title="Thao tác biểu tượng"
             type="button"
             onClick={onIconClick}
             className="absolute top-1/2 right-3 -translate-y-1/2 text-(--color-text-muted) transition-colors hover:text-(--color-primary)"

components/molecules/cards/Card.types.ts

@@ -1,4 +1,5 @@
-import type { Product } from "@/lib/types";
+import type { CartItem } from "@/lib/cart-context";
+import type { Product, UserRole } from "@/lib/types";
 
 export interface ProductCardProps {
   image: string;
@@ -18,8 +19,8 @@ export interface ShopCardProps {
 }
 
 export interface PaymentSummaryCardProps {
+  cartItems: CartItem[];
   totalPrice: number;
-  isCustomer: boolean;
+  role: UserRole;
   backHref: string;
-  onPay?: () => void;
 }

components/molecules/cards/PaymentSummaryCard.tsx

@@ -1,25 +1,46 @@
+"use client";
+
 import Button from "@/components/atoms/buttons/Button";
-import { ReviewModal } from "@/components/organisms/modals";
+import {
+  CashPaymentModal,
+  PaymentSuccessModal,
+  QRPaymentModal,
+} from "@/components/organisms/modals";
+import type { InvoiceItem } from "@/components/organisms/modals";
+import { useCart } from "@/lib/cart-context";
 import Link from "next/link";
 import { useState } from "react";
 
 import type { PaymentSummaryCardProps } from "./Card.types";
 
+type ModalState = "none" | "cash" | "qr" | "success";
+
 const formatPrice = (value: number) =>
   value.toLocaleString("vi-VN", { style: "currency", currency: "VND" });
 
 export default function PaymentSummaryCard({
+  cartItems,
   totalPrice,
-  isCustomer = false,
+  role,
   backHref,
 }: PaymentSummaryCardProps) {
-  const [isReviewOpen, setIsReviewOpen] = useState(false);
-  const handlePayment = () => {
-    // UI-only: open review modal after "payment"
-    if (isCustomer) {
-      setIsReviewOpen(true);
-    }
+  const [openModal, setOpenModal] = useState<ModalState>("none");
+  const { clearCart } = useCart();
+
+  const isCustomer = role === "customer";
+
+  const invoiceItems: InvoiceItem[] = cartItems.map((item) => ({
+    name: item.name,
+    quantity: item.quantity,
+    price: item.price,
+  }));
+
+  const handlePaymentConfirm = () => setOpenModal("success");
+  const handleSuccessClose = () => {
+    clearCart();
+    setOpenModal("none");
   };
+
   return (
     <aside className="shrink-0 xl:w-85">
       <div className="bg-card sticky top-[calc(var(--spacing-header-height)+1rem)] rounded-2xl border border-(--color-border-light) p-4 md:p-5">
@@ -33,45 +54,32 @@ export default function PaymentSummaryCard({
         </div>
 
         <div className="mt-4 grid grid-cols-2 gap-3">
-          <Button
-            style="payment"
-            onClick={handlePayment}
-            icon="fa-solid fa-money-bill-wave"
-            size="md"
-            variant="primary"
-          >
-            Tiền mặt
-          </Button>
+          {!isCustomer && (
+            <Button
+              style="payment"
+              onClick={() => setOpenModal("cash")}
+              icon="fa-solid fa-money-bill-wave"
+              size="md"
+              variant="primary"
+            >
+              Tiền mặt
+            </Button>
+          )}
 
           <Button
             style="payment"
-            onClick={handlePayment}
+            onClick={() => setOpenModal("qr")}
             icon="fa-solid fa-qrcode"
             size="md"
-            variant="secondary"
+            variant={isCustomer ? "primary" : "secondary"}
+            className={isCustomer ? "col-span-2" : ""}
           >
             QR Code
           </Button>
 
-          {isCustomer && (
+          <Link href={backHref || "/"} className="col-span-2">
             <Button
               style="payment"
-              onClick={handlePayment}
-              icon="fa-solid fa-star"
-              size="md"
-              variant="primary"
-            >
-              Đánh giá
-            </Button>
-          )}
-
-          <Link
-            href={backHref || "/"}
-            className={isCustomer ? "" : "col-span-2"}
-          >
-            <Button
-              style="payment"
-              onClick={() => setIsReviewOpen(false)}
               icon="fa-solid fa-arrow-rotate-left"
               size="md"
               variant="secondary"
@@ -83,9 +91,25 @@ export default function PaymentSummaryCard({
         </div>
       </div>
 
-      <ReviewModal
-        isOpen={isReviewOpen}
-        onClose={() => setIsReviewOpen(false)}
+      <CashPaymentModal
+        isOpen={openModal === "cash"}
+        onClose={() => setOpenModal("none")}
+        onConfirm={handlePaymentConfirm}
+        items={invoiceItems}
+        totalAmount={totalPrice}
+      />
+
+      <QRPaymentModal
+        isOpen={openModal === "qr"}
+        onClose={() => setOpenModal("none")}
+        onConfirm={handlePaymentConfirm}
+        items={invoiceItems}
+        totalAmount={totalPrice}
+      />
+
+      <PaymentSuccessModal
+        isOpen={openModal === "success"}
+        onClose={handleSuccessClose}
       />
     </aside>
   );

components/molecules/cards/ProductCard.tsx

@@ -62,7 +62,13 @@ export default function ProductCard({
         <Text variant="body2" className="font-bold">
           {formattedPrice}
         </Text>
-        <Button onClick={onBuy} variant="primary" size="sm" icon="fa-cart-plus">
+        <Button
+          onClick={onBuy}
+          variant="primary"
+          size="sm"
+          icon="fa-cart-plus"
+          aria-label={`Mua ${productName}`}
+        >
           Mua
         </Button>
       </div>

components/molecules/search-bar/SearchBar.tsx

@@ -17,6 +17,7 @@ export default function SearchBar({
         value={value}
         onChange={(e) => onChange(e.target.value)}
         placeholder={placeholder}
+        aria-label="Tìm kiếm món ăn"
         className="bg-card text-foreground border-border placeholder:text-muted-foreground focus:border-primary focus:ring-primary focus:ring-opacity-20 w-full rounded-xl border py-2 pr-9 pl-9 text-sm transition-all duration-150 outline-none focus:ring-2"
       />
       {value && (

components/organisms/manager/ProductModal.tsx

@@ -1,7 +1,8 @@
 "use client";
 
 import type { Product } from "@/lib/types";
-import { useState } from "react";
+import Image from "next/image";
+import { useRef, useState } from "react";
 
 import type { ProductModalProps } from "./Manager.types";
 
@@ -12,6 +13,10 @@ export default function ProductModal({
   onClose,
 }: ProductModalProps) {
   const isEdit = product !== null;
+  const [imageFile, setImageFile] = useState<File | null>(null);
+  const [imagePreview, setImagePreview] = useState<string | null>(null);
+  const [priceError, setPriceError] = useState("");
+  const fileInputRef = useRef<HTMLInputElement>(null);
   const [form, setForm] = useState<Omit<Product, "id">>({
     name: product?.name ?? "",
     category: product?.category ?? categories[0]?.id ?? "",
@@ -21,8 +26,28 @@ export default function ProductModal({
     available: product?.available ?? true,
   });
 
+  const handleImageChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0] ?? null;
+    setImageFile(file);
+    if (file) {
+      setImagePreview(URL.createObjectURL(file));
+    } else {
+      setImagePreview(null);
+    }
+  };
+
+  const handleRemoveImage = () => {
+    setImageFile(null);
+    setImagePreview(null);
+    if (fileInputRef.current) fileInputRef.current.value = "";
+  };
+
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
+    if (form.price <= 0) {
+      setPriceError("Giá phải lớn hơn 0đ");
+      return;
+    }
     if (isEdit && product) {
       onSave({ ...form, id: product.id });
     } else {
@@ -93,15 +118,19 @@ export default function ProductModal({
               <input
                 required
                 type="number"
-                min={0}
+                min={1}
                 step={1000}
                 value={form.price}
-                onChange={(e) =>
-                  setForm({ ...form, price: Number(e.target.value) })
-                }
-                className={inputCls}
+                onChange={(e) => {
+                  setPriceError("");
+                  setForm({ ...form, price: Number(e.target.value) });
+                }}
+                className={`${inputCls} ${priceError ? "border-red-400 focus:border-red-400 focus:ring-red-400/20" : ""}`}
                 placeholder="25000"
               />
+              {priceError && (
+                <p className="mt-1 text-xs text-red-500">{priceError}</p>
+              )}
             </div>
           </div>
 
@@ -120,6 +149,65 @@ export default function ProductModal({
             />
           </div>
 
+          <div>
+            <label
+              className="mb-1 block text-sm font-medium text-(--color-text-secondary)"
+              htmlFor="product-image-upload"
+            >
+              Ảnh sản phẩm
+            </label>
+            <input
+              ref={fileInputRef}
+              id="product-image-upload"
+              type="file"
+              accept="image/*"
+              onChange={handleImageChange}
+              className="sr-only"
+              tabIndex={0}
+            />
+            {imagePreview ? (
+              <div className="relative h-40 overflow-hidden rounded-xl border border-(--color-border)">
+                <Image
+                  src={imagePreview}
+                  alt="Xem trước ảnh sản phẩm"
+                  fill
+                  unoptimized
+                  className="object-cover"
+                />
+                <button
+                  type="button"
+                  onClick={handleRemoveImage}
+                  title="Xóa ảnh"
+                  className="absolute top-2 right-2 flex h-7 w-7 cursor-pointer items-center justify-center rounded-full border-none bg-black/50 text-xs text-white transition hover:bg-black/70"
+                >
+                  <i className="fa-solid fa-xmark"></i>
+                </button>
+                <button
+                  type="button"
+                  onClick={() => fileInputRef.current?.click()}
+                  className="absolute right-2 bottom-2 cursor-pointer rounded-lg border-none bg-black/50 px-3 py-1 text-xs text-white transition hover:bg-black/70"
+                >
+                  Đổi ảnh
+                </button>
+              </div>
+            ) : (
+              <button
+                type="button"
+                onClick={() => fileInputRef.current?.click()}
+                className="flex w-full cursor-pointer flex-col items-center justify-center gap-2 rounded-xl border-2 border-dashed border-(--color-border) bg-transparent px-4 py-6 text-(--color-text-muted) transition hover:border-(--color-primary) hover:text-(--color-primary)"
+              >
+                <i className="fa-solid fa-cloud-arrow-up text-2xl"></i>
+                <span className="text-sm font-medium">Nhấn để chọn ảnh</span>
+                <span className="text-xs">PNG, JPG, WEBP (tối đa 5MB)</span>
+              </button>
+            )}
+            {imageFile && (
+              <p className="mt-1 truncate text-xs text-(--color-text-muted)">
+                {imageFile.name}
+              </p>
+            )}
+          </div>
+
           <div className="bg-background flex items-center justify-between rounded-xl border border-(--color-border-light) px-4 py-3">
             <div>
               <p className="text-foreground text-sm font-medium">Trạng thái</p>

components/organisms/manager/ProductsTab.tsx

@@ -60,6 +60,7 @@ export default function ProductsTab() {
             value={search}
             onChange={(e) => setSearch(e.target.value)}
             placeholder="Tìm kiếm món..."
+            aria-label="Tìm kiếm món"
             className="text-foreground w-full rounded-xl border border-(--color-border) bg-white py-2 pr-9 pl-9 text-sm transition outline-none focus:border-(--color-primary) focus:ring-2 focus:ring-(--color-primary)/20"
           />
           {search && (
@@ -78,6 +79,7 @@ export default function ProductsTab() {
           onChange={(e) => setFilterCategory(e.target.value)}
           className="text-foreground cursor-pointer rounded-xl border border-(--color-border) bg-white px-3 py-2 text-sm transition outline-none focus:border-(--color-primary)"
           title="Lọc theo danh mục"
+          aria-label="Lọc theo danh mục"
         >
           <option value="all">Tất cả danh mục</option>
           {categories.map((cat) => (
@@ -96,6 +98,7 @@ export default function ProductsTab() {
           }
           className="text-foreground cursor-pointer rounded-xl border border-(--color-border) bg-white px-3 py-2 text-sm transition outline-none focus:border-(--color-primary)"
           title="Lọc theo trạng thái"
+          aria-label="Lọc theo trạng thái"
         >
           <option value="all">Tất cả trạng thái</option>
           <option value="available">Còn hàng</option>
@@ -160,7 +163,10 @@ export default function ProductsTab() {
                     <div>
                       <p className="text-foreground font-medium">{p.name}</p>
                       {p.description && (
-                        <p className="mt-0.5 max-w-xs truncate text-xs text-(--color-text-muted)">
+                        <p
+                          title={p.description}
+                          className="mt-0.5 max-w-xs truncate text-xs text-(--color-text-muted)"
+                        >
                           {p.description}
                         </p>
                       )}
@@ -191,6 +197,7 @@ export default function ProductsTab() {
                       <button
                         onClick={() => setModalProduct(p)}
                         title="Chỉnh sửa"
+                        aria-label={`Chỉnh sửa: ${p.name}`}
                         className="flex h-8 w-8 cursor-pointer items-center justify-center rounded-lg border border-(--color-border-light) bg-transparent text-(--color-text-muted) transition hover:border-(--color-primary-light) hover:text-(--color-primary)"
                       >
                         <i className="fa-solid fa-pen text-xs"></i>
@@ -198,6 +205,7 @@ export default function ProductsTab() {
                       <button
                         onClick={() => setDeleteTarget(p)}
                         title="Xóa"
+                        aria-label={`Xóa: ${p.name}`}
                         className="flex h-8 w-8 cursor-pointer items-center justify-center rounded-lg border border-transparent bg-transparent text-(--color-text-muted) transition hover:border-red-200 hover:bg-red-50 hover:text-red-500"
                       >
                         <i className="fa-solid fa-trash text-xs"></i>

components/organisms/manager/StatusBadge.tsx

@@ -6,7 +6,7 @@ export default function StatusBadge({ available }: StatusBadgeProps) {
       className={`inline-flex items-center gap-1.5 rounded-full px-2.5 py-0.5 text-xs font-medium ${
         available
           ? "bg-emerald-100 text-emerald-700"
-          : "bg-amber-100 text-amber-700"
+          : "bg-amber-100 text-amber-800"
       }`}
     >
       <span

components/organisms/modals/CashPaymentModal.tsx

@@ -0,0 +1,144 @@
+"use client";
+
+import Button from "@/components/atoms/buttons/Button";
+import { useEffect, useState } from "react";
+
+import type { CashPaymentModalProps } from "./Modal.types";
+
+const formatPrice = (value: number) =>
+  value.toLocaleString("vi-VN", { style: "currency", currency: "VND" });
+
+export default function CashPaymentModal({
+  isOpen,
+  onClose,
+  onConfirm,
+  items,
+  totalAmount,
+}: CashPaymentModalProps) {
+  const [cashReceived, setCashReceived] = useState("");
+
+  useEffect(() => {
+    if (isOpen) setCashReceived("");
+  }, [isOpen]);
+
+  if (!isOpen) return null;
+
+  const parsedCash = cashReceived === "" ? 0 : Number(cashReceived);
+  const isInsufficient = cashReceived !== "" && parsedCash < totalAmount;
+  const changeAmount = parsedCash - totalAmount;
+  const canConfirm = cashReceived !== "" && !isInsufficient && parsedCash >= 0;
+
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center p-4"
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="cash-modal-title"
+    >
+      <div
+        className="absolute inset-0 bg-black/50 backdrop-blur-sm"
+        aria-hidden="true"
+      />
+      <div className="relative w-full max-w-lg rounded-2xl border border-(--color-border-light) bg-white p-6 shadow-xl">
+        <h2
+          id="cash-modal-title"
+          className="text-foreground mb-4 text-xl font-bold"
+        >
+          Thanh toán tiền mặt
+        </h2>
+
+        {/* Invoice list */}
+        <div className="mb-4">
+          <h3 className="mb-2 text-sm font-semibold tracking-wide text-(--color-text-secondary) uppercase">
+            Hóa đơn
+          </h3>
+          <div className="overflow-hidden rounded-xl border border-(--color-border-light)">
+            {items.map((item, index) => (
+              <div
+                key={index}
+                className="flex items-center justify-between border-b border-(--color-border-light) px-4 py-2.5 last:border-b-0"
+              >
+                <span className="text-foreground font-medium">{item.name}</span>
+                <div className="flex items-center gap-3">
+                  <span className="text-sm text-(--color-text-muted)">
+                    x{item.quantity}
+                  </span>
+                  <span className="font-semibold text-(--color-primary)">
+                    {formatPrice(item.price * item.quantity)}
+                  </span>
+                </div>
+              </div>
+            ))}
+            <div className="flex items-center justify-between bg-(--color-border-light)/30 px-4 py-3">
+              <span className="text-foreground font-bold">Tổng cộng</span>
+              <span className="text-lg font-bold text-(--color-primary)">
+                {formatPrice(totalAmount)}
+              </span>
+            </div>
+          </div>
+        </div>
+
+        {/* Cash input section */}
+        <div className="mb-5">
+          <label
+            htmlFor="cash-input"
+            className="mb-1.5 block text-sm font-medium text-(--color-text-secondary)"
+          >
+            Số tiền nhận
+          </label>
+          <input
+            id="cash-input"
+            type="number"
+            min="0"
+            step={1000}
+            value={cashReceived}
+            onChange={(e) => setCashReceived(e.target.value)}
+            placeholder="0"
+            className="w-full rounded-lg border border-(--color-border) bg-transparent px-3 py-2 text-right text-lg font-semibold focus:ring-2 focus:ring-(--color-primary) focus:outline-none"
+          />
+          {isInsufficient && (
+            <p className="mt-1.5 text-sm text-red-500">
+              <i className="fa-solid fa-triangle-exclamation mr-1"></i>
+              Số tiền không đủ
+            </p>
+          )}
+          {cashReceived !== "" && !isInsufficient && (
+            <div className="mt-2 flex items-center justify-between rounded-lg bg-(--color-border-light)/40 px-3 py-2">
+              <span className="text-sm text-(--color-text-secondary)">
+                Tiền thối
+              </span>
+              <span className="font-semibold text-(--color-primary)">
+                {formatPrice(changeAmount)}
+              </span>
+            </div>
+          )}
+        </div>
+
+        {/* Footer buttons */}
+        <div className="flex gap-3">
+          <Button
+            type="button"
+            variant="secondary"
+            size="md"
+            icon="fa-solid fa-arrow-left"
+            className="flex-1"
+            onClick={onClose}
+          >
+            Quay lại
+          </Button>
+          <Button
+            type="button"
+            variant="primary"
+            size="md"
+            icon="fa-solid fa-check"
+            className="flex-1"
+            onClick={onConfirm}
+            disabled={!canConfirm}
+          >
+            Xác nhận
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+}

components/organisms/modals/Modal.types.ts

@@ -12,3 +12,30 @@ export interface ConfirmModalProps {
   confirmLabel?: string;
   cancelLabel?: string;
 }
+
+export interface InvoiceItem {
+  name: string;
+  quantity: number;
+  price: number;
+}
+
+export interface CashPaymentModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => void;
+  items: InvoiceItem[];
+  totalAmount: number;
+}
+
+export interface QRPaymentModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => void;
+  items: InvoiceItem[];
+  totalAmount: number;
+}
+
+export interface PaymentSuccessModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+}

components/organisms/modals/PaymentSuccessModal.tsx

@@ -0,0 +1,54 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useEffect } from "react";
+
+interface PaymentSuccessModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+}
+
+export default function PaymentSuccessModal({
+  isOpen,
+  onClose,
+}: PaymentSuccessModalProps) {
+  const router = useRouter();
+
+  useEffect(() => {
+    if (!isOpen) return;
+    const timer = setTimeout(() => {
+      router.push("/");
+      onClose();
+    }, 1000);
+    return () => clearTimeout(timer);
+  }, [isOpen, router, onClose]);
+
+  if (!isOpen) return null;
+
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center p-4"
+      role="dialog"
+      aria-modal="true"
+    >
+      {/* Backdrop */}
+      <div
+        className="absolute inset-0 bg-black/50 backdrop-blur-sm"
+        aria-hidden="true"
+      />
+
+      {/* Modal */}
+      <div className="relative w-full max-w-sm rounded-2xl border border-(--color-border-light) bg-white p-8 shadow-xl">
+        <div className="flex flex-col items-center gap-4 text-center">
+          <i className="fa-solid fa-circle-check text-5xl text-(--color-primary)"></i>
+          <h2 className="text-foreground text-xl font-bold">
+            Thanh toán thành công!
+          </h2>
+          <p className="text-sm text-(--color-text-muted)">
+            Cảm ơn quý khách. Đang chuyển về trang chủ...
+          </p>
+        </div>
+      </div>
+    </div>
+  );
+}

components/organisms/modals/QRPaymentModal.tsx

@@ -0,0 +1,116 @@
+"use client";
+
+import { QRCodeSVG } from "qrcode.react";
+import { useEffect, useState } from "react";
+
+import type { QRPaymentModalProps } from "./Modal.types";
+
+const formatPrice = (value: number) =>
+  value.toLocaleString("vi-VN", { style: "currency", currency: "VND" });
+
+const COUNTDOWN_SECONDS = 5;
+
+export default function QRPaymentModal({
+  isOpen,
+  onClose,
+  onConfirm,
+  items,
+  totalAmount,
+}: QRPaymentModalProps) {
+  const [qrValue, setQrValue] = useState("");
+  const [timeLeft, setTimeLeft] = useState(COUNTDOWN_SECONDS);
+
+  useEffect(() => {
+    if (!isOpen) return;
+
+    setQrValue(`payment:${totalAmount}:${Date.now()}`);
+    setTimeLeft(COUNTDOWN_SECONDS);
+
+    const interval = setInterval(() => {
+      setTimeLeft((prev) => {
+        if (prev <= 1) {
+          clearInterval(interval);
+          return 0;
+        }
+        return prev - 1;
+      });
+    }, 1000);
+
+    return () => clearInterval(interval);
+  }, [isOpen, totalAmount]);
+
+  useEffect(() => {
+    if (timeLeft === 0 && isOpen) {
+      onConfirm();
+    }
+  }, [timeLeft, isOpen, onConfirm]);
+
+  if (!isOpen) return null;
+
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center p-4"
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="qr-modal-title"
+    >
+      <div
+        className="absolute inset-0 bg-black/50 backdrop-blur-sm"
+        aria-hidden="true"
+        onClick={onClose}
+      />
+      <div className="relative w-full max-w-lg rounded-2xl border border-(--color-border-light) bg-white p-6 shadow-xl">
+        <h2
+          id="qr-modal-title"
+          className="text-foreground mb-4 text-xl font-bold"
+        >
+          Thanh toán QR Code
+        </h2>
+
+        {/* Invoice list */}
+        <div className="mb-4">
+          <h3 className="mb-2 text-sm font-semibold tracking-wide text-(--color-text-secondary) uppercase">
+            Hóa đơn
+          </h3>
+          <div className="overflow-hidden rounded-xl border border-(--color-border-light)">
+            {items.map((item, index) => (
+              <div
+                key={index}
+                className="flex items-center justify-between border-b border-(--color-border-light) px-4 py-2.5 last:border-b-0"
+              >
+                <span className="text-foreground font-medium">{item.name}</span>
+                <div className="flex items-center gap-3">
+                  <span className="text-sm text-(--color-text-muted)">
+                    x{item.quantity}
+                  </span>
+                  <span className="font-semibold text-(--color-primary)">
+                    {formatPrice(item.price * item.quantity)}
+                  </span>
+                </div>
+              </div>
+            ))}
+            <div className="flex items-center justify-between bg-(--color-border-light)/30 px-4 py-3">
+              <span className="text-foreground font-bold">Tổng cộng</span>
+              <span className="text-lg font-bold text-(--color-primary)">
+                {formatPrice(totalAmount)}
+              </span>
+            </div>
+          </div>
+        </div>
+
+        {/* QR code section */}
+        <div className="flex flex-col items-center gap-3 rounded-xl border border-(--color-border-light) px-4 py-5">
+          <p className="text-sm font-medium text-(--color-text-secondary)">
+            Quét mã QR để thanh toán
+          </p>
+          {qrValue && <QRCodeSVG value={qrValue} size={180} />}
+          <p className="text-sm text-(--color-text-muted)">
+            Tự động xác nhận sau{" "}
+            <span className="font-bold text-(--color-primary)">{timeLeft}</span>{" "}
+            giây...
+          </p>
+        </div>
+      </div>
+    </div>
+  );
+}

components/organisms/modals/ReviewModal.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { Button, Heading, Text, Textarea } from "@/components/atoms";
-import { useState } from "react";
+import { useEffect, useState } from "react";
 
 import type { ReviewModalProps } from "./Modal.types";
 
@@ -11,6 +11,12 @@ export default function ReviewModal({ isOpen, onClose }: ReviewModalProps) {
   const [review, setReview] = useState("");
   const [submitted, setSubmitted] = useState(false);
 
+  useEffect(() => {
+    if (!submitted) return;
+    const timer = setTimeout(handleClose, 1000);
+    return () => clearTimeout(timer);
+  }, [submitted]);
+
   if (!isOpen) return null;
 
   const handleSubmit = () => {
@@ -54,9 +60,6 @@ export default function ReviewModal({ isOpen, onClose }: ReviewModalProps) {
             <Text variant="body2" className="mt-2">
               Chúng tôi trân trọng đánh giá của bạn!
             </Text>
-            <Button onClick={handleClose} variant="primary" className="mt-4">
-              Đóng
-            </Button>
           </div>
         ) : (
           /* Review form */
@@ -98,7 +101,7 @@ export default function ReviewModal({ isOpen, onClose }: ReviewModalProps) {
                         className={
                           isActive
                             ? "fa-solid fa-star text-yellow-400"
-                            : "fa-regular fa-star text-(--color-border)"
+                            : "fa-regular fa-star text-gray-300"
                         }
                       ></i>
                     </button>

components/organisms/modals/index.ts

@@ -1,2 +1,7 @@
 export { default as ReviewModal } from "./ReviewModal";
+export { default as PaymentSuccessModal } from "./PaymentSuccessModal";
+export { default as CashPaymentModal } from "./CashPaymentModal";
+export { default as QRPaymentModal } from "./QRPaymentModal";
 export type { ReviewModalProps, ConfirmModalProps } from "./Modal.types";
+export type { CashPaymentModalProps, InvoiceItem } from "./Modal.types";
+export type { QRPaymentModalProps } from "./Modal.types";

components/organisms/navigation/CategorySidebar.tsx

@@ -47,6 +47,7 @@ export default function CategorySidebar({
         <button
           onClick={onToggle}
           title={isOpen ? "Thu gọn menu" : "Mở rộng menu"}
+          aria-label={isOpen ? "Thu gọn menu" : "Mở rộng menu"}
           className="flex h-8 w-8 shrink-0 cursor-pointer items-center justify-center rounded-lg border-none bg-transparent text-(--color-text-muted) transition-colors duration-150 hover:bg-(--color-border-light) hover:text-(--color-primary) xl:hidden"
         >
           <i

layouts/LAYOUTS.md

@@ -2,6 +2,8 @@
 
 > Tài liệu chi tiết về layout components (Header, Footer) và responsive behavior
 
+> **Last Updated:** 2026-04-18
+
 ---
 
 ## Overview
@@ -21,180 +23,197 @@ layouts/
 
 ## Header (layouts/header.tsx)
 
-**File:** layouts/header.tsx **Type:** Client component **Description:** Sticky
-top navigation bar with brand info and authentication status display.
+**File:** layouts/header.tsx **Type:** Client component (`"use client"`)
+**Description:** Sticky top navigation bar with brand info and authentication
+status display. Uses `useAuth()` context for real auth state and `useRouter()`
+for navigation.
 
 ### Layout
 
 ```
 ┌─────────────────────────────────────────────────────┐
-│  [Logo] [Shop Name] [Tagline]  │  [Auth Status]    │
+│  [Logo] [Shop Name] [Tagline]  │  [Auth Button(s)]  │
 └─────────────────────────────────────────────────────┘
-height: 72px (var(--spacing-header-height))
+height: var(--spacing-header-height)  (72px)
 ```
 
 **2-Column Layout:**
 
-- **Left:** Shop branding (logo + name + tagline)
-- **Right:** Auth status indicator
+- **Left:** Shop branding (logo + name + tagline) — wrapped in `<Link href="/">`
+- **Right:** Auth status indicator (varies by user role)
 
 ### Features
 
 #### Logo & Branding
 
-- Shop logo (40x40px)
-- Shop name (bold text)
+- Shop logo rendered with `next/image` (fill, 40x40px / 44x44px on md+)
+- Shop name (bold, color transitions on hover)
 - Tagline (hidden on mobile < md, visible md+)
+- Entire left section is a link to `/`
 
-**Responsive:** | Breakpoint | Logo | Name | Tagline |
-|-----------|------|------|---------| | < sm (640px) | Yes | Yes | Hidden | |
-sm-md | Yes | Yes | Hidden | | md+ (768px) | Yes | Yes | Visible |
+**Responsive:**
+
+| Breakpoint   | Logo      | Name | Tagline |
+| ------------ | --------- | ---- | ------- |
+| < sm (640px) | h-10/w-10 | Yes  | Hidden  |
+| sm-md        | h-10/w-10 | Yes  | Hidden  |
+| md+ (768px)  | h-11/w-11 | Yes  | Visible |
 
 #### Authentication Status
 
-The header cycles through 3 auth states (for UI demo):
+The header reads from `useAuth()` and reflects the actual logged-in user role.
 
-**State 1: Guest (Not logged in)**
+**State 1: Guest (user = null)**
 
 ```
-[brown button] "Dang nhap"
+[brown button] "Đăng nhập"   ← icon always shown, label hidden on xs
 ```
 
-- Guest state (user = null)
-- Brown primary button
-- Click: toggles to next state
+- `title="Đăng nhập"` on button
+- Clicking navigates to `/login`
+- Icon: `fa-solid fa-right-to-bracket`
 
-**State 2: Manager**
+**State 2: Manager (user.role === "manager")**
 
 ```
-[caramel/gold badge] "👔 Quản lý"
+[Dashboard link] [Logout icon button]
 ```
 
-- Shows manager role
-- Gold/caramel colored badge
-- User tie icon
-- Name: Nguyễn Văn An
+- Dashboard link → `/manager`
+- Icon: `fa-solid fa-user-tie`
+- Label "Dashboard" hidden on xs, visible sm+
+- Logout button: `title="Đăng xuất"`, `aria-label="Đăng xuất"`
+- Logout icon: `fa-solid fa-right-from-bracket`
+- Hover: red tint on logout button
 
-**State 3: Staff**
+**State 3: Staff (user.role === "staff")**
 
 ```
-[border button] "👤 [Name]"
+[Ca làm link] [Avatar + Name button (logout on click)]
 ```
 
-- Shows staff role with avatar placeholder
-- Bordered button style
-- Name: Trần Thị Bình
-- Click: toggles back to Guest state
+- Ca làm link → `/staff/schedule`
+- Icon: `fa-solid fa-calendar-check`
+- Label "Ca làm" hidden on xs, visible sm+
+- Staff button: `title="Nhấn để đăng xuất"`, `aria-label="Đăng xuất"`
+- Avatar: colored circle with `fa-solid fa-user`
+- Name hidden on xs, visible sm+
+
+**State 4: Customer (user.role === "customer")**
+
+```
+[Customer icon + "Khách hàng" button (logout on click)]
+```
+
+- `title="Khách hàng - {user.phone} - Nhấn để đăng xuất"`
+- Avatar circle with `fa-solid fa-user`
+- Label "Khách hàng" hidden on xs, visible sm+
 
 ### Responsive Behavior
 
-| Breakpoint    | Layout                          |
-| ------------- | ------------------------------- |
-| < sm          | Stacked vertically              |
-| sm-md (640px) | Side-by-side, reduced spacing   |
-| md+ (768px)   | Full width, comfortable spacing |
+| Breakpoint    | Layout                                 |
+| ------------- | -------------------------------------- |
+| < sm (640px)  | Button labels hidden, icons only       |
+| sm-md (640px) | Button labels visible, reduced spacing |
+| md+ (768px)   | Full layout including tagline          |
 
 **Mobile (<640px):**
 
-- Logo smaller
-- Name only (no tagline)
-- Auth button text hidden, icon shown
+- Logo 40x40px
+- Shop name only (no tagline)
+- Auth button shows icon only (label hidden via `hidden sm:inline`)
 - Touch-friendly padding
 
-**Desktop (≥640px):**
+**Desktop (≥768px):**
 
-- Normal logo size
+- Logo 44x44px
 - Full layout with tagline
-- Button with text and icon
+- Buttons show icon + text label
 - Comfortable spacing
 
+### Accessibility
+
+- Logo image: `alt="Logo {SHOP_INFO.name}"`
+- Guest button: `title="Đăng nhập"`
+- Manager logout button: `title="Đăng xuất"`, `aria-label="Đăng xuất"`
+- Staff logout button: `title="Nhấn để đăng xuất"`, `aria-label="Đăng xuất"`
+- Customer button: `title="Khách hàng - {phone} - Nhấn để đăng xuất"`
+- Icons are presentational (no aria-hidden needed — buttons have
+  title/aria-label)
+
 ### Styling
 
-| Element              | Classes                                                   |
-| -------------------- | --------------------------------------------------------- |
-| Header wrapper       | `sticky top-0 z-50 bg-white shadow-md`                    |
-| Container            | `max-w-7xl mx-auto px-4 md:px-6 h-72px flex items-center` |
-| Left section (brand) | `flex items-center gap-3 flex-1`                          |
-| Right section (auth) | `flex items-center gap-3 shrink-0`                        |
-| Logo image           | `w-10 h-10 md:w-12 md:h-12`                               |
-| Brand text           | `font-bold text-sm md:text-base`                          |
-| Tagline              | `hidden md:block text-xs text-muted-foreground`           |
-| Auth button          | `px-4 py-2 rounded-lg text-sm font-medium`                |
+| Element              | Classes                                                                                                                                                |
+| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| Header wrapper       | `sticky top-0 z-50 h-(--spacing-header-height) w-full border-b bg-(--color-bg-header) shadow-[...]`                                                    |
+| Container            | `mx-auto flex h-full max-w-screen-2xl items-center justify-between gap-6 px-6 md:px-8 lg:px-12`                                                        |
+| Left section (brand) | `group flex shrink-0 items-center gap-4 no-underline` (Link)                                                                                           |
+| Logo wrapper         | `relative h-10 w-10 shrink-0 md:h-11 md:w-11`                                                                                                          |
+| Brand text           | `text-base font-bold text-(--color-primary-dark) md:text-lg`                                                                                           |
+| Tagline              | `hidden text-xs text-(--color-text-muted) md:block`                                                                                                    |
+| Right section (auth) | `flex shrink-0 items-center gap-3`                                                                                                                     |
+| Guest button         | `flex items-center gap-2.5 rounded-xl bg-(--color-primary) px-5 py-2.5 text-sm font-semibold text-white`                                               |
+| Manager link         | `flex items-center gap-2 rounded-xl border border-(--color-accent) bg-(--color-accent-light)`                                                          |
+| Logout button        | `flex items-center gap-2 rounded-xl border border-(--color-border) bg-transparent px-3 py-2.5 hover:border-red-300 hover:bg-red-50 hover:text-red-500` |
+| Staff button         | `flex items-center gap-2.5 rounded-xl border border-(--color-border) bg-background`                                                                    |
+| Customer button      | `flex items-center gap-2.5 rounded-xl bg-(--color-primary-light) px-4 py-2 text-white`                                                                 |
 
 ### CSS Variables Used
 
 ```css
---spacing-header-height: 72px;
---color-primary: brown;
---color-primary-dark: darker brown;
---color-text-primary: text color;
---color-text-muted: gray text;
---color-shadow-sm: subtle shadow;
+--spacing-header-height     /* 72px — header height */
+--color-bg-header           /* header background */
+--color-border              /* border color */
+--color-shadow-sm           /* subtle shadow */
+--color-primary             /* brand primary (brown) */
+--color-primary-dark        /* darker brown */
+--color-primary-light       /* lighter brown */
+--color-accent              /* accent/gold color */
+--color-accent-light        /* light accent background */
+--color-text-muted          /* gray/muted text */
+--color-text-secondary      /* secondary text color */
+--color-border-light        /* light border */
 ```
 
 ### Dependencies
 
-- **next/image** - Logo image rendering
-- **next/link** - Navigation links
-- **lib/constants:** SHOP_INFO, MOCK_USERS
-- **lib/types:** User
-- **FontAwesome icons:** fa-sign-in-alt, fa-sign-out-alt, fa-user-tie,
-  fa-user-circle
-
-### Key Code Snippets
-
-**Auth Demo State Machine:**
-
-```typescript
-const [user, setUser] = useState<User | null>(null);
-
-const handleAuthClick = () => {
-  if (!user) {
-    setUser(MOCK_USERS.manager);
-  } else if (user.role === "manager") {
-    setUser(MOCK_USERS.staff);
-  } else {
-    setUser(null);
-  }
-};
-```
-
-**Responsive Brand Text:**
-
-```typescript
-<div className="flex flex-col">
-  <span className="font-bold text-sm md:text-base">{SHOP_INFO.name}</span>
-  <span className="hidden md:block text-xs text-muted-foreground">
-    {SHOP_INFO.tagline}
-  </span>
-</div>
-```
+- **next/image** — Logo image rendering
+- **next/link** — Brand link, dashboard link, schedule link
+- **next/navigation** — `useRouter` for programmatic navigation
+- **lib/auth-context:** `useAuth` — user state, logout
+- **lib/constants:** `SHOP_INFO`
 
 ---
 
 ## Footer (layouts/footer.tsx)
 
-**File:** layouts/footer.tsx **Type:** Client component (uses constants)
+**File:** layouts/footer.tsx **Type:** Server component (no `"use client"`)
 **Description:** Site footer with shop information, social links, and WiFi
-details.
+details. Copyright year is dynamic via `new Date().getFullYear()`.
 
 ### Layout
 
 ```
-┌────────────────────────────────────────────┐
-│  [Brand Info]  │  [Social + WiFi]          │
-├────────────────────────────────────────────┤
-│  © 2024 Coffee Shop. Made with ❤️ in VN   │
-└────────────────────────────────────────────┘
+┌────────────────────────────────────────────────────────────────┐
+│  [Brand Info]              │  [Social + WiFi]                  │
+├────────────────────────────────────────────────────────────────┤
+│  © {year} Coffee Shop. All rights reserved.  |  Powered by ... │
+└────────────────────────────────────────────────────────────────┘
 ```
 
 **12-Column Grid Layout:**
 
-| Breakpoint   | Brand Info  | Social + WiFi |
-| ------------ | ----------- | ------------- |
-| Mobile       | col-span-12 | col-span-12   |
-| md (768px)   | col-span-6  | col-span-6    |
-| lg+ (1024px) | col-span-6  | col-span-6    |
+| Breakpoint   | Brand Info  | Right column (Social + WiFi)     |
+| ------------ | ----------- | -------------------------------- |
+| Mobile       | col-span-12 | col-span-12                      |
+| md (768px)   | col-span-6  | col-span-6                       |
+| lg+ (1024px) | col-span-8  | col-span-4                       |
+| xl+          | col-span-6  | col-span-6 (with 2-col sub-grid) |
+
+The right column (Social + WiFi) uses an internal sub-grid:
+
+- Mobile/lg: stacked (1 column)
+- xl+: side-by-side (2 columns)
 
 ### Sections
 
@@ -202,179 +221,114 @@ details.
 
 **Content:**
 
-- Shop logo (40x40px)
-- Shop name (bold)
-- Tagline (gray text)
-- Address with location icon
-- Phone with phone icon
-- Email with envelope icon
-- Open hours with clock icon
+- Shop logo (40x40px, `next/image`)
+- Shop name (bold, accent color)
+- Tagline (gray, 75% opacity)
+- Address with `fa-solid fa-location-dot`
+- Phone (clickable `tel:` link) with `fa-solid fa-phone`
+- Email (clickable `mailto:` link) with `fa-solid fa-envelope`
+- Open hours with `fa-solid fa-clock`
 
-**Responsive:**
+#### 2. Social Links
 
-```
-Mobile:
-└─ Logo
-└─ Name & Tagline (stacked)
-└─ Address
-└─ Phone
-└─ Email
-└─ Open Hours
+**Links (heading: "Kết nối"):**
 
-Desktop:
-└─ Logo + Name/Tagline (flexbox, side-by-side)
-└─ Address, Phone, Email, Hours (stacked below)
-```
-
-#### 2. Social Links (Top Right)
-
-**Links:**
-
-- Facebook icon → SHOP_INFO.facebook
-- TikTok icon → SHOP_INFO.tiktok
-- Website icon → SHOP_INFO.website
+- Facebook → `SOCIAL_LINKS.facebook` (branded blue icon, opens `_blank`)
+- TikTok → `SOCIAL_LINKS.tiktok` (black icon, opens `_blank`)
+- Website → `SOCIAL_LINKS.website` (primary color icon, uses `next/link`)
 
 **Styling:**
 
-- Icons in circle backgrounds
-- Hover effect (color change)
-- Flex row layout
-- Centered alignment
+- Each item: icon badge (8x8 rounded-lg) + label text
+- Hover: accent color + full opacity
 
-#### 3. WiFi Card (Bottom Right)
+#### 3. WiFi Card
 
-**Content:**
+**Content (heading: "WiFi Miễn Phí"):**
 
-- "📶 WiFi miễn phí" label
-- Network name (monospace)
-- Password (monospace, can be hidden/shown)
+- WiFi icon (`fa-solid fa-wifi`)
+- Network name (monospace, accent-bordered)
+- Password (monospace, accent-bordered, always visible — no toggle)
+
+**Note:** Current implementation shows password in plain text (no hide/show
+toggle). This differs from older documentation.
 
 **Styling:**
 
-- Light gray background
-- Rounded borders
+- Semi-transparent dark panel (`bg-(--color-primary-dark) bg-opacity-30`)
+- Rounded xl border
+- Stacked label + value rows (no overflow risk)
 - Monospace font for credentials
-- Eye icon toggle for password visibility
 
-**Example:**
-
-```
-📶 WiFi miễn phí
-┌────────────────────────┐
-│ Network: CoffeeShop    │
-│ Password: ••••••••     │
-│           (eye icon)   │
-└────────────────────────┘
-```
-
-#### 4. Copyright Bar (Bottom)
+#### 4. Bottom Bar
 
 **Content:**
 
-- Copyright text: "© 2024 Coffee Shop"
-- "Made with ❤️ in Vietnam"
-- Centered
-
-**Styling:**
-
-- Small text
-- Gray color
-- Subtle separator line above
+- Left: `© {year} {SHOP_INFO.name}. All rights reserved.`
+- Right: `Được vận hành ❤ bằng Drinkool`
+- Responsive: stacked on mobile, side-by-side on sm+
 
 ### Responsive Behavior
 
 **Mobile (<768px):**
 
 - Single column layout
-- Stacked sections
+- Stacked sections (brand, then social+WiFi)
 - Full width
-- Padding around edges
 
 **Tablet (768px):**
 
-- 2-column layout
-- Brand info left, Social + WiFi right
-- Equal width columns
+- 2-column: brand (6 cols) | social+WiFi (6 cols)
+- Social and WiFi stacked within right column
 
-**Desktop (≥768px):**
+**Desktop (≥1024px):**
 
-- 2-column layout with more spacing
-- Brand info slightly smaller
-- Comfortable padding
+- Brand 8 cols, right 4 cols
+- Social and WiFi stacked in right col
+
+**XL (≥1280px):**
+
+- Brand 6 cols, right 6 cols
+- Social and WiFi side-by-side in right col sub-grid
 
 ### Styling
 
-| Element        | Classes                                                   |
-| -------------- | --------------------------------------------------------- |
-| Footer wrapper | `bg-gray-100 border-t`                                    |
-| Container      | `max-w-7xl mx-auto px-4 py-8`                             |
-| Grid           | `grid grid-cols-12 gap-8`                                 |
-| Brand section  | `col-span-12 md:col-span-6`                               |
-| Social section | `col-span-12 md:col-span-6`                               |
-| Logo           | `w-10 h-10`                                               |
-| Info text      | `text-sm text-gray-600`                                   |
-| Social icons   | `w-10 h-10 rounded-full flex items-center justify-center` |
-| WiFi card      | `bg-white p-4 rounded-lg border`                          |
-| Copyright bar  | `border-t mt-8 pt-6 text-center text-xs text-gray-500`    |
+| Element           | Classes                                                                                                              |
+| ----------------- | -------------------------------------------------------------------------------------------------------------------- |
+| Footer wrapper    | `w-full overflow-x-hidden bg-(--color-bg-footer) text-(--color-text-on-dark)`                                        |
+| Container         | `mx-auto max-w-screen-2xl px-4 py-10 md:px-6 lg:px-8`                                                                |
+| Grid              | `grid grid-cols-12 gap-x-8 gap-y-8`                                                                                  |
+| Brand section     | `col-span-12 md:col-span-6 lg:col-span-8 xl:col-span-6`                                                              |
+| Right section     | `col-span-12 grid grid-cols-1 gap-6 md:col-span-6 lg:col-span-4 xl:col-span-6 xl:grid-cols-2`                        |
+| Logo              | `relative h-10 w-10 shrink-0`                                                                                        |
+| Shop name         | `text-lg font-bold text-(--color-accent)`                                                                            |
+| Tagline           | `text-sm leading-relaxed opacity-75`                                                                                 |
+| Contact list      | `flex flex-col gap-2 text-sm opacity-80`                                                                             |
+| Social icon badge | `flex h-8 w-8 shrink-0 items-center justify-center rounded-lg`                                                       |
+| WiFi card         | `rounded-xl border border-(--color-primary-light) bg-(--color-primary-dark) p-4`                                     |
+| WiFi value        | `rounded border border-(--color-accent) px-2 py-1 font-mono font-bold text-(--color-accent)`                         |
+| Bottom bar        | `border-t border-white border-opacity-10`                                                                            |
+| Copyright row     | `mx-auto flex max-w-screen-2xl flex-col sm:flex-row items-center justify-between gap-2 px-4 py-4 text-xs opacity-50` |
 
 ### CSS Variables Used
 
 ```css
---color-primary: brand color;
---color-text-secondary: secondary text color;
---color-text-muted: muted/gray text color;
---color-accent: accent color;
---color-border: border color;
---color-bg-*: background colors;
---color-shadow-sm: subtle shadow;
+--color-bg-footer           /* dark footer background */
+--color-text-on-dark        /* light text for dark backgrounds */
+--color-accent              /* accent/gold color */
+--color-primary             /* brand primary (brown) */
+--color-primary-dark        /* darker brown */
+--color-primary-light       /* lighter brown */
+--color-border              /* border color */
 ```
 
 ### Dependencies
 
-- **next/image** - Shop logo
-- **next/link** - Social links
-- **lib/constants:** SHOP_INFO, SOCIAL_LINKS
-- **FontAwesome icons:** location-dot, phone, envelope, clock, facebook, tiktok,
-  globe, wifi, eye, eye-slash
-
-### Key Code Snippets
-
-**Brand Info Section:**
-
-```typescript
-<div className="flex gap-4">
-  <Image src={SHOP_INFO.logo} alt={SHOP_INFO.name} width={40} height={40} />
-  <div>
-    <h3 className="font-bold">{SHOP_INFO.name}</h3>
-    <p className="text-sm text-muted-foreground">{SHOP_INFO.tagline}</p>
-    <p className="text-sm mt-2">{SHOP_INFO.address}</p>
-    {/* etc */}
-  </div>
-</div>
-```
-
-**Social Links:**
-
-```typescript
-<div className="flex gap-3">
-  <Link href={SOCIAL_LINKS.facebook} target="_blank" rel="noopener">
-    <i className="fab fa-facebook" />
-  </Link>
-  {/* etc */}
-</div>
-```
-
-**WiFi Display:**
-
-```typescript
-<div className="bg-white p-4 rounded-lg">
-  <p className="font-semibold text-sm">📶 WiFi miễn phí</p>
-  <p className="font-mono text-xs mt-2">{SHOP_INFO.wifi.name}</p>
-  <p className="font-mono text-xs">
-    {showPassword ? SHOP_INFO.wifi.password : "••••••••"}
-  </p>
-</div>
-```
+- **next/image** — Shop logo
+- **next/link** — Website social link
+- **lib/constants:** `SHOP_INFO`, `SOCIAL_LINKS`
+- **FontAwesome icons:** `location-dot`, `phone`, `envelope`, `clock`,
+  `fa-brands fa-facebook-f`, `fa-brands fa-tiktok`, `globe`, `wifi`, `heart`
 
 ---
 
@@ -398,7 +352,7 @@ export default function RootLayout({ children }) {
 
 **Result:**
 
-- Header: Always at top (sticky)
+- Header: Always at top (sticky, z-50)
 - Content: Takes full width between header/footer
 - Footer: Always at bottom
 
@@ -409,30 +363,22 @@ export default function RootLayout({ children }) {
 ### Header Responsive Pattern
 
 ```css
-/* Mobile first */
-.header {
-  flex-direction: column;
-  gap: 1rem;
-  padding: 1rem;
+/* Mobile first — icon-only auth buttons */
+.header-auth-label {
+  display: none; /* hidden on xs */
 }
 
-/* Tablet+ */
+/* sm+ — show button labels */
 @media (min-width: 640px) {
-  .header {
-    flex-direction: row;
-    justify-content: space-between;
-    padding: 1.5rem;
+  .header-auth-label {
+    display: inline; /* hidden sm:inline */
   }
 }
 
-/* Desktop+ */
+/* md+ — show tagline */
 @media (min-width: 768px) {
-  .header {
-    padding: 2rem;
-  }
-
   .tagline {
-    display: block; /* Show tagline on desktop */
+    display: block; /* hidden md:block */
   }
 }
 ```
@@ -440,17 +386,14 @@ export default function RootLayout({ children }) {
 ### Footer Responsive Pattern
 
 ```css
-/* Mobile: stacked */
+/* Mobile: single column */
 .footer-grid {
-  grid-template-columns: 1fr;
+  grid-template-columns: repeat(12, 1fr);
 }
 
-/* Tablet: 2 columns */
-@media (min-width: 768px) {
-  .footer-grid {
-    grid-template-columns: 1fr 1fr;
-  }
-}
+/* md: brand 6 cols, right 6 cols */
+/* lg: brand 8 cols, right 4 cols */
+/* xl: brand 6 cols, right 6 cols — right col uses xl:grid-cols-2 */
 ```
 
 ---
@@ -483,33 +426,38 @@ CSS variables are set up for dark mode support. To enable:
 
 ### Header
 
-- Logo has alt text
-- Auth button has aria-label
-- Icons have semantic meaning
-- Good contrast ratios
+- Logo image has descriptive `alt` text: `"Logo {SHOP_INFO.name}"`
+- Guest button: `title="Đăng nhập"`
+- Manager logout button: `title="Đăng xuất"` + `aria-label="Đăng xuất"`
+- Staff logout button: `title="Nhấn để đăng xuất"` + `aria-label="Đăng xuất"`
+- Customer button: `title="Khách hàng - {phone} - Nhấn để đăng xuất"`
+- Interactive elements have hover and active states (visual feedback)
+- Touch targets are sized appropriately (px-4/5 + py-2/2.5)
 
 ### Footer
 
-- Headings use semantic tags
-- Links have descriptive text
-- Icons are decorative (aria-hidden)
-- Monospace font for technical info (WiFi credentials)
+- Phone and email are clickable `<a>` links (`tel:`, `mailto:`)
+- Social links open in `_blank` with `rel="noopener noreferrer"`
+- Section headings use `<h3>` semantic tags
+- Icons are decorative within labelled list items
+- WiFi credentials in monospace font for readability
 
 ### General
 
-- Touch targets ≥ 48px on mobile
-- Sufficient color contrast
-- Semantic HTML structure
-- ARIA labels where needed
+- Touch targets ≥ 44px (py-2.5 + px-4/5 buttons)
+- `active:scale-95` on interactive buttons for tactile feedback
+- Semantic HTML structure (`<header>`, `<footer>`, `<nav>` implicit via links)
+- ARIA labels on icon-only buttons (logout buttons)
 
 ---
 
 ## Best Practices
 
 1. **Keep layouts simple:** Avoid complex nested layouts
-2. **Responsive first:** Use mobile-first CSS approach
+2. **Responsive first:** Use mobile-first CSS approach (`hidden sm:inline`)
 3. **Reuse components:** Use Header/Footer across all pages
 4. **Props over hardcoding:** Use lib/constants for data
 5. **Type safety:** Use TypeScript for component props
-6. **Performance:** Optimize images with next/image
-7. **Accessibility:** Add ARIA labels and semantic HTML
+6. **Performance:** Optimize images with next/image (`fill`, `sizes`,
+   `priority`)
+7. **Accessibility:** Add title/aria-label on icon-only buttons

layouts/header.tsx

@@ -91,6 +91,7 @@ export default function Header() {
               <button
                 onClick={handleAuthClick}
                 title="Đăng xuất"
+                aria-label="Đăng xuất"
                 className="flex cursor-pointer items-center gap-2 rounded-xl border border-(--color-border) bg-transparent px-3 py-2.5 text-sm font-medium text-(--color-text-muted) transition-all duration-150 hover:border-red-300 hover:bg-red-50 hover:text-red-500 active:scale-95"
               >
                 <i className="fa-solid fa-right-from-bracket text-base"></i>
@@ -109,6 +110,7 @@ export default function Header() {
               <button
                 onClick={handleAuthClick}
                 title="Nhấn để đăng xuất"
+                aria-label="Đăng xuất"
                 className="bg-background flex cursor-pointer items-center gap-2.5 rounded-xl border border-(--color-border) px-4 py-2 text-sm font-semibold text-(--color-text-secondary) transition-all duration-150 hover:border-(--color-primary-light) hover:bg-(--color-border-light) active:scale-95"
               >
                 {/* Avatar circle */}

lib/cart-context.tsx

@@ -20,6 +20,7 @@ interface CartContextValue {
   decreaseQty: (id: number) => void;
   removeFromCart: (id: number) => void;
   setQuantity: (id: number, quantity: number) => void;
+  clearCart: () => void;
 }
 
 const STORAGE_KEY = "coffee-shop-cart";
@@ -91,6 +92,8 @@ export function CartProvider({ children }: { children: React.ReactNode }) {
     setItems((prev) => prev.filter((item) => item.id !== id));
   };
 
+  const clearCart = () => setItems([]);
+
   const setQuantity = (id: number, quantity: number) => {
     const safeQty = Number.isFinite(quantity)
       ? Math.max(0, Math.floor(quantity))
@@ -127,6 +130,7 @@ export function CartProvider({ children }: { children: React.ReactNode }) {
       decreaseQty,
       removeFromCart,
       setQuantity,
+      clearCart,
     }),
     [items, totalItems, totalPrice],
   );

package-lock.json

@@ -9,10 +9,11 @@
       "version": "1.1.2",
       "dependencies": {
         "@tailwindcss/postcss": "^4.2.2",
-        "@types/node": "^20.19.37",
+        "@types/node": "^20.19.39",
         "@types/react": "^19.2.14",
         "next": "16.1.7",
         "nextjs": "^0.0.3",
+        "qrcode.react": "^4.2.0",
         "react": "19.2.3",
         "react-dom": "19.2.3",
         "tailwind": "^4.0.0",
@@ -27,7 +28,7 @@
         "@types/react-dom": "^19.2.3",
         "eslint": "^9.39.4",
         "eslint-config-next": "16.1.7",
-        "prettier": "^3.8.1",
+        "prettier": "^3.8.2",
         "prettier-plugin-embed": "^0.5.1",
         "prettier-plugin-groovy": "^0.2.1",
         "prettier-plugin-tailwindcss": "^0.7.2",
@@ -126,6 +127,7 @@
       "integrity": "sha512-CGOfOJqWjg2qW/Mb6zNsDm+u5vFQ8DxXfbM09z69p5Z6+mE1ikP2jUXw+j42Pf1XTYED2Rni5f95npYeuwMDQA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.29.0",
         "@babel/generator": "^7.29.0",
@@ -1381,6 +1383,7 @@
       "integrity": "sha512-DhGl4xMVFGVIyMwswXeyzdL4uXD5OGILGX5N8Y+f6W7LhC1Ze2poSNrkF/fedpVDHEEZ+PHFW0vL14I+mm8K3Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@octokit/auth-token": "^6.0.0",
         "@octokit/graphql": "^9.0.3",
@@ -2380,6 +2383,7 @@
       "integrity": "sha512-3DgfkukFyC/sE/VuYjaUUWoFfuVjPK55vOFDsxD56XXynFMCZDYFogH2l/hDfOsQAm1myoU/1xByJ3tWqtulXA==",
       "dev": true,
       "license": "Apache-2.0",
+      "peer": true,
       "dependencies": {
         "@babel/generator": "^7.28.0",
         "@babel/parser": "^7.28.0",
@@ -2495,9 +2499,9 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "20.19.37",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.37.tgz",
-      "integrity": "sha512-8kzdPJ3FsNsVIurqBs7oodNnCEVbni9yUEkaHbgptDACOPW04jimGagZ51E6+lXUwJjgnBw+hyko/lkFWCldqw==",
+      "version": "20.19.39",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.39.tgz",
+      "integrity": "sha512-orrrD74MBUyK8jOAD/r0+lfa1I2MO6I+vAkmAWzMYbCcgrN4lCrmK52gRFQq/JRxfYPfonkr4b0jcY7Olqdqbw==",
       "license": "MIT",
       "dependencies": {
         "undici-types": "~6.21.0"
@@ -2515,6 +2519,7 @@
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.14.tgz",
       "integrity": "sha512-ilcTH/UniCkMdtexkoCN0bI7pMcJDvmQFPvuPvmEaYA/NSfFTAgdUSLAoVjaRJm7+6PvcM+q1zYOwS4wTYMF9w==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "csstype": "^3.2.2"
       }
@@ -2584,6 +2589,7 @@
       "integrity": "sha512-30ScMRHIAD33JJQkgfGW1t8CURZtjc2JpTrq5n2HFhOefbAhb7ucc7xJwdWcrEtqUIYJ73Nybpsggii6GtAHjA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@typescript-eslint/scope-manager": "8.57.2",
         "@typescript-eslint/types": "8.57.2",
@@ -3109,6 +3115,7 @@
       "integrity": "sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -3731,6 +3738,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.9.0",
         "caniuse-lite": "^1.0.30001759",
@@ -5238,6 +5246,7 @@
       "integrity": "sha512-XoMjdBOwe/esVgEvLmNsD3IRHkm7fbKIUGvrleloJXUZgDHig2IPWNniv+GwjyJXzuNqVjlr5+4yVUZjycJwfQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -5423,6 +5432,7 @@
       "integrity": "sha512-whOE1HFo/qJDyX4SnXzP4N6zOWn79WhnCUY/iDR0mPfQZO8wcYE4JClzI2oZrhBnnMUCBCHZhO6VQyoBU95mZA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@rtsao/scc": "^1.1.0",
         "array-includes": "^3.1.9",
@@ -8394,6 +8404,7 @@
       "integrity": "sha512-8dD6FusOQSrpv9Z1rdNMdlSgQOIP880DHqnohobOmYLElGEqAL/JvxvuxZO16r4HtjTlfPRDC1hbvxC9dPN2nA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "marked": "bin/marked.js"
       },
@@ -10806,6 +10817,7 @@
       "dev": true,
       "inBundle": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -11611,11 +11623,12 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.8.1",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.1.tgz",
-      "integrity": "sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.3.tgz",
+      "integrity": "sha512-7igPTM53cGHMW8xWuVTydi2KO233VFiTNyF5hLJqpilHfmn8C8gPf+PS7dUT64YcXFbiMGZxS9pCSxL/Dxm/Jw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
@@ -11834,6 +11847,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/qrcode.react": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/qrcode.react/-/qrcode.react-4.2.0.tgz",
+      "integrity": "sha512-QpgqWi8rD9DsS9EP3z7BT+5lY5SFhsqGjpgW5DY/i3mK4M9DTBNz3ErMi8BWYEfI3L0d8GIbGmcdFAS1uIRGjA==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/qs": {
       "version": "6.5.2",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
@@ -11930,6 +11952,7 @@
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.3.tgz",
       "integrity": "sha512-Ku/hhYbVjOQnXDZFv2+RibmLFGwFdeeKHFcOTlrt7xplBnya5OGn/hIRDsqDiSUcfORsDC7MPxwork8jBwsIWA==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -11939,6 +11962,7 @@
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.3.tgz",
       "integrity": "sha512-yELu4WmLPw5Mr/lmeEpox5rw3RETacE++JgHqQzd2dg+YbJuat3jH4ingc+WPZhxaoFzdv9y33G+F7Nl5O0GBg==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "scheduler": "^0.27.0"
       },
@@ -12304,6 +12328,7 @@
       "integrity": "sha512-WRgl5GcypwramYX4HV+eQGzUbD7UUbljVmS+5G1uMwX/wLgYuJAxGeerXJDMO2xshng4+FXqCgyB5QfClV6WjA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@semantic-release/commit-analyzer": "^13.0.1",
         "@semantic-release/error": "^4.0.0",
@@ -13561,6 +13586,7 @@
       "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -13786,6 +13812,7 @@
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "license": "Apache-2.0",
+      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -14437,6 +14464,7 @@
       "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }

package.json

@@ -15,6 +15,8 @@
     "@types/node": "^20.19.39",
     "@types/react": "^19.2.14",
     "next": "16.1.7",
+    "nextjs": "^0.0.3",
+    "qrcode.react": "^4.2.0",
     "react": "19.2.3",
     "react-dom": "19.2.3",
     "tailwind": "^4.0.0",

register-shift-feature-prompt.md

@@ -1,156 +0,0 @@
-# Feature Prompt: Register Shift (Đăng Ký Ca Làm)
-
-## Tổng Quan
-
-Xây dựng tính năng **Register Shift** cho phép nhân viên xem và đăng ký ca làm
-việc theo khung thời gian do quản lý tạo ra. Tính năng hỗ trợ cả hai vai trò:
-**Manager** và **Staff**, với giao diện responsive thích ứng theo kích thước màn
-hình.
-
----
-
-## Mục Đích
-
-- Cho phép nhân viên xem danh sách các khung thời gian ca làm khả dụng và đăng
-  ký vào ca mà họ muốn làm.
-- Quản lý (Manager) có toàn quyền tạo, chỉnh sửa và xóa các khung thời gian ca
-  làm.
-- Nhân viên có thể thấy ca làm của đồng nghiệp để tránh xung đột hoặc điều chỉnh
-  lịch phù hợp.
-- Cả Manager và Staff đều có thể chỉnh sửa hoặc hủy ca đã đăng ký của nhân viên.
-
----
-
-## Vai Trò & Phân Quyền
-
-### Manager
-
-- Tạo, chỉnh sửa, xóa khung thời gian ca làm (shift slots).
-- Xem lịch làm việc của toàn bộ nhân viên theo tuần hoặc tháng.
-- Phê duyệt hoặc từ chối yêu cầu đăng ký ca.
-- Xóa hoặc thay đổi ca làm của bất kỳ nhân viên nào.
-- Gán ca làm cho nhân viên cụ thể nếu cần.
-
-### Staff (Nhân Viên)
-
-- Xem danh sách ca làm khả dụng trong tuần hoặc tháng.
-- Đăng ký vào ca mà mình muốn làm.
-- Xem ca đã được đăng ký bởi các nhân viên khác.
-- Hủy hoặc chỉnh sửa ca đã đăng ký của bản thân (trong giới hạn thời gian cho
-  phép).
-
----
-
-## Yêu Cầu Giao Diện
-
-### Desktop (≥ 1024px) — Dạng Bảng Lịch Tuần/Tháng
-
-- Hiển thị lịch làm việc dạng **table theo tuần** (mặc định), với khả năng
-  chuyển sang **xem theo tháng**.
-- Mỗi cột đại diện cho một ngày trong tuần (Mon–Sun).
-- Mỗi hàng đại diện cho một nhân viên hoặc một khung giờ.
-- Các ca làm được hiển thị dưới dạng **card màu** trong ô tương ứng, gồm:
-  - Tên ca / Khung giờ (ví dụ: `08:00 – 12:00`)
-  - Số giờ làm & mức lương dự kiến (ví dụ: `4h · 120k`)
-  - Trạng thái: `Available`, `Registered`, `Approved Leave`, `Absent`
-- **Bộ lọc tuần/tháng** ở góc trên, cho phép điều hướng qua lại giữa các
-  tuần/tháng.
-- Hiển thị **tổng ngân sách tuần** (Weekly Budget) ở đầu bảng.
-- Nhóm nhân viên theo **department/role** (ví dụ: Bar Staff, Janitors,...).
-- Mỗi ca làm có thể click để xem chi tiết, chỉnh sửa hoặc xóa.
-
-#### Chế Độ Xem Theo Tháng (Month View)
-
-- Hiển thị dạng **calendar grid** (lưới 7 cột × ~5 hàng).
-- Mỗi ô ngày hiển thị số ca đã đăng ký hoặc dấu chấm màu trạng thái (tương tự
-  ảnh tham khảo).
-- Cho phép nhân viên và manager tính toán ngày có thể nghỉ hoặc đăng ký ca xa
-  hơn trong tháng.
-
----
-
-### Mobile (< 768px) — Dạng Lịch Dọc + Dot Indicator
-
-- Hiển thị **calendar theo tháng dạng nhỏ gọn** (compact calendar) ở đầu màn
-  hình.
-  - Các ngày có ca làm được đánh dấu bằng **dot màu** phía dưới số ngày:
-    - 🟡 Vàng: Ca đang mở / khả dụng
-    - 🟢 Xanh lá: Ca đã được đăng ký
-    - ⚫ Xám: Không có ca
-  - Ngày hiện tại được highlight bằng vòng tròn (dark circle).
-- Khi chọn một ngày, hiển thị danh sách ca làm của ngày đó bên dưới.
-- Mỗi ca làm hiển thị dưới dạng **card dọc**:
-  - Khung giờ, số giờ, mức lương
-  - Tên nhân viên đã đăng ký (nếu có)
-  - Nút **Đăng ký** hoặc **Hủy đăng ký**
-- Điều hướng tháng bằng nút `<` và `>` ở hai bên tiêu đề tháng.
-
----
-
-## Trạng Thái Ca Làm (Shift Status)
-
-| Trạng Thái     | Màu             | Mô Tả                             |
-| -------------- | --------------- | --------------------------------- |
-| Available      | Xanh dương nhạt | Ca đang mở, chưa có ai đăng ký    |
-| Registered     | Xanh dương đậm  | Nhân viên đã đăng ký ca này       |
-| Approved Leave | Tím/Lavender    | Nhân viên đã được duyệt nghỉ phép |
-| Absent         | Đỏ/Hồng         | Nhân viên vắng mặt không có lý do |
-
----
-
-## Luồng Chức Năng Chính
-
-### Staff — Đăng Ký Ca
-
-1. Truy cập màn hình Register Shift.
-2. Chọn tuần hoặc tháng muốn xem.
-3. Xem các ca làm khả dụng (Available).
-4. Click vào ca → Xem thông tin chi tiết (giờ, lương, số người đã đăng ký).
-5. Nhấn **Register** để đăng ký ca.
-6. Ca chuyển sang trạng thái **Registered**.
-
-### Manager — Tạo Ca Làm Mới
-
-1. Vào giao diện dashboard của manager.
-2. Vào giao diện lịch của nhóm/department.
-3. Click vào ô ngày muốn tạo ca.
-4. Nhập thông tin: Khung giờ bắt đầu – kết thúc, số lượng nhân viên cần, mức
-   lương.
-5. Lưu → Ca hiển thị trên lịch với trạng thái **Available**.
-
-### Xóa / Chỉnh Sửa Ca
-
-- **Manager**: Có thể chỉnh sửa hoặc xóa bất kỳ ca nào của bất kỳ nhân viên nào.
-- **Staff**: Chỉ có thể hủy ca của bản thân, trong phạm vi thời gian cho phép
-  (ví dụ: trước 24h so với giờ bắt đầu ca).
-
----
-
-## Dữ Liệu & Logic
-
-### Shift Slot Object
-
-```json
-{
-  "id": "shift_001",
-  "date": "2025-04-22",
-  "startTime": "08:00",
-  "endTime": "12:00",
-  "durationHours": 3.5,
-  "wage": 80,
-  "department": "Bar Staff",
-  "maxStaff": 2,
-  "registeredStaff": [{ "id": "staff_01", "name": "Carol Saragosa" }],
-  "status": "registered"
-}
-```
-
----
-
-## Ghi Chú Bổ Sung
-
-- Nhân viên **không được đăng ký 2 ca trùng giờ** trong cùng một ngày.
-- Hệ thống cần hiển thị **cảnh báo xung đột** khi nhân viên cố đăng ký ca bị
-  trùng lịch.
-- Cần hỗ trợ **thông báo (notification)** khi ca làm bị thay đổi hoặc bị hủy bởi
-  manager.