# Requirements Document
Generated: Tuesday, September 16, 2025

## Functional Requirements (Developer-Facing)

### FR-001: Project Initialization
- **Description:** The system shall provide a developer-ready Angular project that can be set up with minimal effort.
- **Acceptance Criteria:**
    - A developer shall be able to clone the project from a Git repository.
    - A developer shall be able to install all required dependencies using a single `npm install` command.
    - A developer shall be able to start the local development server using the `ng serve` command.
    - The boilerplate shall compile without errors and be viewable in a web browser.
- **Priority:** High

### FR-002: Modular Architecture
- **Description:** The system shall be structured with a scalable and maintainable modular architecture.
- **Acceptance Criteria:**
    - The project shall include a `CoreModule` for providing singleton services and one-time imports.
    - The project shall include a `SharedModule` for reusable components, directives, and pipes.
    - The architecture shall support the creation of lazy-loaded `FeatureModules` to encapsulate business domain logic.
- **Priority:** High

### FR-003: Clarity Design System Integration
- **Description:** The system shall be fully integrated with the VMware Clarity Design System for UI components and styling.
- **Acceptance Criteria:**
    - All necessary Clarity npm packages shall be included as dependencies.
    - Clarity's global stylesheets and assets shall be correctly configured and loaded.
    - The boilerplate shall use Clarity components for its core layout (header, sidebar, etc.).
    - Developers shall be able to use any Clarity component within their feature modules.
- **Priority:** High

### FR-004: Responsive Application Layout
- **Description:** The system shall provide a default, responsive application layout.
- **Acceptance Criteria:**
    - The boilerplate shall include a main application shell with a header, a collapsible sidebar for navigation, and a main content area.
    - The layout shall adapt correctly to various screen sizes, including desktop, tablet, and mobile.
- **Priority:** High

### FR-005: Routing and Navigation
- **Description:** The system shall include a pre-configured routing system for navigating between different views.
- **Acceptance Criteria:**
    - The project shall have a main `AppRoutingModule`.
    - The boilerplate shall provide an example of a lazy-loaded feature route.
    - Navigation links in the sidebar shall correctly navigate to their corresponding routes.
- **Priority:** Medium

## Non-Functional Requirements

### NFR-001: Performance (Developer Experience)
- **Description:** The boilerplate should be optimized for a fast and efficient development workflow.
- **Acceptance Criteria:**
    - The initial `ng serve` compilation time shall be reasonably fast.
    - Live-reloading times during development shall be minimal.
    - The production build (`ng build --prod`) shall be optimized, with tree-shaking and minification enabled.
- **Priority:** Medium

### NFR-002: Usability (Developer Experience)
- **Description:** The codebase should be intuitive and easy for an Angular developer to understand and extend.
- **Acceptance Criteria:**
    - The project structure shall be logical and follow established Angular best practices.
    - The code shall be clean, well-formatted, and include comments for complex or non-obvious sections.
    - A comprehensive `README.txt` file shall guide developers on setup, architecture, and usage.
- **Priority:** High

### NFR-003: Maintainability
- **Description:** The codebase should be structured to allow for easy updates, modifications, and extensions.
- **Acceptance Criteria:**
    - The modular architecture shall allow for independent development and testing of features.
    - Dependencies shall be clearly defined in `package.json` and easy to update.
    - The separation of concerns between modules should be strictly enforced.
- **Priority:** High

## Data Requirements (Client-Side)

### Entity Modeling:
- **Description:** The boilerplate will not have predefined data models but will require developers to define them using TypeScript.
- **Attributes:**
    - Data models shall be defined as **TypeScript interfaces or classes**.
    - These models will represent the structure of data consumed from and sent to a backend API.

## Interface Requirements

### UI/UX Requirements (Frontend Boilerplate):
- **Layout:** A clean, professional single-page application layout based on the Clarity Design System.
- **Header:** A top header bar, typically containing the application title/logo and user-related actions (e.g., profile, logout).
- **Sidebar:** A collapsible vertical navigation sidebar containing links to different feature areas of the application.
- **Content Area:** A main content area where the components for the currently active route are displayed.
- **Styling:** Adherence to the styles and design tokens provided by the Clarity Design System.

### API Requirements (Backend Interaction):
- **Backend Agnostic:** The boilerplate is a frontend application and makes no assumptions about the backend technology stack.
- **Communication Protocol:** The boilerplate shall use Angular's `HttpClient` module to communicate with a backend over HTTP/HTTPS.
- **API Endpoint Configuration:** The base URL for the backend API shall be configurable via the `environments` files (e.g., `environment.ts`, `environment.prod.ts`).
- **Data Format:** The boilerplate is designed to work with APIs that transact data in **JSON** format.
- **Error Handling:** The architecture shall support a centralized way to handle API errors, typically through an `HttpInterceptor` provided in the `CoreModule`.

---

## REQUIREMENTS UPDATE - 2025-10-06 07:12:17



## Requirements Review and Confirmation - 2025-10-06 {current_timestamp}
This review confirms that the detailed requirements specification, including Functional Requirements (FR-001 to FR-011), Non-Functional Requirements (NFR-001 to NFR-005), Data Requirements, and Interface Requirements, provides a complete and actionable foundation for the 'Working Notes Application'. These specifications are fully aligned with the `io8codermaster_breakdown.md` and `io8codermaster_plan.md` addendums, ensuring traceability to the original project vision.

All critical features for the Minimum Viable Product (MVP), such as user registration/login, password reset, and the full suite of note CRUD operations, are clearly defined with measurable acceptance criteria and appropriate priorities. Non-functional aspects covering performance, security, usability, scalability, and reliability are robust and provide essential guidelines for development and testing. The data model and interface requirements provide the necessary details for architectural design and implementation planning.

This document serves as a solid basis for subsequent phases, particularly for the `io8architect` and `io8developer` agents, to proceed with system design and implementation.



---

## REQUIREMENTS UPDATE - 2025-10-06 07:34:27


## Functional Requirements for Notes App - 2025-10-06T07:45:00Z

### FR-001: User Registration
-   **Description:** The system shall allow new users to register an account using a unique email address and a password.
-   **Acceptance Criteria:**
    *   Given a user navigates to the registration page, when they enter a unique email and a password (meeting complexity requirements), and confirm the password, then the system creates a new user account and logs them in.
    *   Given an email address is already registered, the system shall prevent new registration with that email and display an error.
    *   Passwords shall be securely hashed before storage.
-   **Priority:** High

### FR-002: User Login
-   **Description:** The system shall allow registered users to log in using their email and password.
-   **Acceptance Criteria:**
    *   Given a user navigates to the login page, when they enter a registered email and correct password, then the system authenticates the user and grants access to their notes.
    *   Given incorrect credentials, the system shall display an "Invalid credentials" error without revealing if the email or password was incorrect.
    *   The system shall issue a secure token (e.g., JWT) upon successful login for subsequent authenticated requests.
-   **Priority:** High

### FR-003: Password Reset (Basic)
-   **Description:** The system shall provide a basic mechanism for users to initiate a password reset process.
-   **Acceptance Criteria:**
    *   Given a user requests a password reset, when they provide a registered email address, then the system shall simulate sending password reset instructions (e.g., log to console in MVP).
-   **Priority:** Medium

### FR-004: Create New Note
-   **Description:** Authenticated users shall be able to create new notes with a title and rich-text content.
-   **Acceptance Criteria:**
    *   Given an authenticated user is on the notes dashboard, when they access the "Create Note" interface and submit a title and content, then a new note entry is created and associated with their user ID.
    *   The system shall support rich-text formatting for note content (e.g., bold, italics, lists).
    *   If no title is provided, the system shall assign a default title (e.g., "Untitled Note").
-   **Priority:** High

### FR-005: View All Notes
-   **Description:** Authenticated users shall be able to view a paginated or scrollable list of all notes they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user accesses the notes dashboard, then a list displaying the title and creation/last modified date of each of their notes is shown.
    *   The list shall be sortable by creation date (ascending/descending) and last modified date (ascending/descending).
    *   Each item in the list shall be clickable to view the note in detail.
-   **Priority:** High

### FR-006: View Individual Note
-   **Description:** Authenticated users shall be able to view the full details (title and content) of a specific note they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user selects a note from the list, then a dedicated view displaying the full title and rich-text content of that note is presented.
    *   The view shall include options to edit or delete the note.
-   **Priority:** High

### FR-007: Edit Existing Note
-   **Description:** Authenticated users shall be able to modify the title and rich-text content of any note they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user is viewing a specific note, when they activate the edit function and modify the title or content, then the system updates the note's details and records the `last_modified` timestamp.
    *   The system shall validate the updated content for integrity and rich-text formatting.
-   **Priority:** High

### FR-008: Delete Note
-   **Description:** Authenticated users shall be able to permanently delete any note they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user attempts to delete a note, then a confirmation dialog shall appear asking for explicit confirmation.
    *   When the user confirms deletion, then the note and its associated data are permanently removed from the database.
    *   The user shall be redirected to the main notes list after successful deletion.
-   **Priority:** High

### FR-009: Secure Note Access
-   **Description:** The system shall enforce strict authorization, ensuring users can only access (view, create, edit, delete) their own notes.
-   **Acceptance Criteria:**
    *   Given an authenticated user attempts to access a note not associated with their user ID, then the system shall return an unauthorized error (e.g., HTTP 403 Forbidden).
    *   All API endpoints for note management shall verify user ownership before processing the request.
-   **Priority:** High

### FR-010: Search Notes (Phase 3)
-   **Description:** Authenticated users shall be able to search their notes by keywords in the title or content.
-   **Acceptance Criteria:**
    *   Given an authenticated user enters a search query in a search bar, when the query is submitted, then the system shall return a filtered list of the user's notes that match the keywords.
    *   Search shall be case-insensitive.
-   **Priority:** Medium (for Phase 3)

### FR-011: Note Categorization/Tagging (Phase 3)
-   **Description:** Authenticated users shall be able to assign categories or tags to their notes for better organization.
-   **Acceptance Criteria:**
    *   Given an authenticated user is creating or editing a note, then they can input or select multiple tags/categories for that note.
    *   Users shall be able to filter their note list by one or more assigned tags/categories.
-   **Priority:** Low (for Phase 3)

## Non-Functional Requirements for Notes App - 2025-10-06T07:45:00Z

### NFR-001: Performance
-   **Description:** The application shall provide a responsive user experience with efficient data retrieval and processing.
-   **Acceptance Criteria:**
    *   Note lists (up to 100 notes per user) shall load within 2 seconds.
    *   Individual notes shall load within 1 second.
    *   API response times for CRUD operations shall be less than 500ms under normal load (up to 50 concurrent users).
-   **Priority:** High

### NFR-002: Security
-   **Description:** The application shall protect user data and ensure secure interactions.
-   **Acceptance Criteria:**
    *   All user passwords shall be stored as salted hashes (e.g., using bcrypt).
    *   Data transmission between frontend and backend shall be encrypted (HTTPS).
    *   Authentication tokens (e.g., JWT) shall be short-lived and refreshed securely.
    *   Input validation shall be performed on all user-submitted data to prevent injection attacks (e.g., XSS, SQL injection).
    *   Rate limiting shall be implemented on login attempts to mitigate brute-force attacks.
-   **Priority:** High

### NFR-003: Usability
-   **Description:** The user interface shall be intuitive, easy to navigate, and consistent with the Clarity Design System.
-   **Acceptance Criteria:**
    *   The application shall adhere to Clarity Design System guidelines for components, typography, and spacing.
    *   Navigation menus shall be clear and logically organized.
    *   Form fields shall have clear labels, placeholders, and validation feedback.
    *   The application shall be fully responsive and usable across common desktop and mobile browser sizes.
-   **Priority:** High

### NFR-004: Scalability
-   **Description:** The application's architecture shall be designed to accommodate future growth in users and data.
-   **Acceptance Criteria:**
    *   The backend shall be stateless to allow for easy horizontal scaling.
    *   The database schema shall be optimized for efficient querying of notes and user data.
    *   Containerization (Docker) shall be used for easy deployment and scaling of frontend and backend services.
-   **Priority:** Medium

### NFR-005: Maintainability
-   **Description:** The codebase shall be well-structured, modular, and easy to understand for future development and debugging.
-   **Acceptance Criteria:**
    *   Code shall follow established coding standards for Angular (frontend) and the chosen backend framework.
    *   Key components, services, and API endpoints shall be documented with clear comments and explanations.
    *   Module separation for concerns (e.g., authentication, notes) shall be evident in the project structure.
-   **Priority:** Medium

## Data Requirements for Notes App - 2025-10-06T07:45:00Z

### Entities and Relationships

#### 1. User
-   **Description:** Represents a registered user of the notes application.
-   **Attributes:**
    *   `id`: UUID (Primary Key, unique identifier)
    *   `email`: String (Unique, required, used for login)
    *   `password_hash`: String (Required, securely hashed password)
    *   `created_at`: Timestamp (Automatically set on creation)
    *   `updated_at`: Timestamp (Automatically updated on modification)

#### 2. Note
-   **Description:** Represents a user's individual note.
-   **Attributes:**
    *   `id`: UUID (Primary Key, unique identifier)
    *   `user_id`: UUID (Foreign Key, links to `User.id`, required)
    *   `title`: String (Required, max length 255)
    *   `content`: Text (Optional, rich-text format supported)
    *   `created_at`: Timestamp (Automatically set on creation)
    *   `updated_at`: Timestamp (Automatically updated on modification)

#### Relationships:
*   `User` 1 -- M `Note`: One user can have many notes. Each note belongs to exactly one user.

## Interface Requirements for Notes App - 2025-10-06T07:45:00Z

### UI/UX Requirements
*   **Design System:** Frontend UI shall strictly adhere to the Clarity Design System for all components (buttons, forms, data grids, navigation).
*   **Layout:**
    *   A primary responsive layout consistent with the base Angular Clarity boilerplate, featuring a header, sidebar (for navigation), and a main content area.
    *   Login/Registration pages shall have a dedicated, minimalist layout.
*   **Navigation:**
    *   Clear vertical navigation in the sidebar for accessing "My Notes", "Create New Note", and (optionally) "Categories/Tags".
    *   Header area for application branding and user-related actions (e.g., Logout).
*   **Note Editor:** A rich-text editor component for creating and editing note content.
*   **Forms:** All forms (login, registration, create/edit note) shall include clear validation feedback.

### API Requirements (RESTful)
*   **Base URL:** `/api/v1` (versioned for future compatibility).
*   **Authentication:** All authenticated endpoints shall require a valid JWT in the `Authorization` header (`Bearer <token>`).
*   **Error Handling:** API shall return meaningful HTTP status codes and JSON error messages for failures (e.g., 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 500 Internal Server Error).
*   **Endpoints:**

    *   **User Authentication:**
        *   `POST /auth/register`: Register a new user.
            *   Request Body: `{ "email": "string", "password": "string" }`
            *   Response: `{ "token": "string", "user": { "id": "uuid", "email": "string" } }`
        *   `POST /auth/login`: Authenticate an existing user.
            *   Request Body: `{ "email": "string", "password": "string" }`
            *   Response: `{ "token": "string", "user": { "id": "uuid", "email": "string" } }`
        *   `POST /auth/password-reset`: Initiate password reset.
            *   Request Body: `{ "email": "string" }`
            *   Response: `{ "message": "Password reset instructions sent." }`

    *   **Note Management:**
        *   `GET /notes`: Retrieve a list of the authenticated user's notes.
            *   Query Params: `sort_by` (e.g., "created_at", "updated_at"), `order` ("asc", "desc"), `page`, `limit`, `search` (Phase 3), `tag` (Phase 3).
            *   Response: `[{ "id": "uuid", "title": "string", "content_snippet": "string", "created_at": "timestamp", "updated_at": "timestamp" }]` (paginated).
        *   `GET /notes/{id}`: Retrieve a single note by ID (owned by the authenticated user).
            *   Response: `{ "id": "uuid", "title": "string", "content": "text", "created_at": "timestamp", "updated_at": "timestamp" }`
        *   `POST /notes`: Create a new note for the authenticated user.
            *   Request Body: `{ "title": "string", "content": "text" }`
            *   Response: `{ "id": "uuid", "title": "string", "content": "text", "created_at": "timestamp", "updated_at": "timestamp" }` (created note details).
        *   `PUT /notes/{id}`: Update an existing note by ID (owned by the authenticated user).
            *   Request Body: `{ "title": "string", "content": "text" }` (partial updates allowed).
            *   Response: `{ "id": "uuid", "title": "string", "content": "text", "created_at": "timestamp", "updated_at": "timestamp" }` (updated note details).
        *   `DELETE /notes/{id}`: Delete a note by ID (owned by the authenticated user).
            *   Response: `{ "message": "Note deleted successfully." }`



---

## REQUIREMENTS UPDATE - 2025-10-06 07:36:07

## Functional Requirements
### Functional Requirements for Notes App - 2025-10-06T07:45:00Z

### FR-001: User Registration
-   **Description:** The system shall allow new users to register an account using a unique email address and a password.
-   **Acceptance Criteria:**
    *   Given a user navigates to the registration page, when they enter a unique email and a password (meeting complexity requirements), and confirm the password, then the system creates a new user account and logs them in.
    *   Given an email address is already registered, the system shall prevent new registration with that email and display an error.
    *   Passwords shall be securely hashed before storage.
-   **Priority:** High

### FR-002: User Login
-   **Description:** The system shall allow registered users to log in using their email and password.
-   **Acceptance Criteria:**
    *   Given a user navigates to the login page, when they enter a registered email and correct password, then the system authenticates the user and grants access to their notes.
    *   Given incorrect credentials, the system shall display an "Invalid credentials" error without revealing if the email or password was incorrect.
    *   The system shall issue a secure token (e.g., JWT) upon successful login for subsequent authenticated requests.
-   **Priority:** High

### FR-003: Password Reset (Basic)
-   **Description:** The system shall provide a basic mechanism for users to initiate a password reset process.
-   **Acceptance Criteria:**
    *   Given a user requests a password reset, when they provide a registered email address, then the system shall simulate sending password reset instructions (e.g., log to console in MVP).
-   **Priority:** Medium

### FR-004: Create New Note
-   **Description:** Authenticated users shall be able to create new notes with a title and rich-text content.
-   **Acceptance Criteria:**
    *   Given an authenticated user is on the notes dashboard, when they access the "Create Note" interface and submit a title and content, then a new note entry is created and associated with their user ID.
    *   The system shall support rich-text formatting for note content (e.g., bold, italics, lists).
    *   If no title is provided, the system shall assign a default title (e.g., "Untitled Note").
-   **Priority:** High

### FR-005: View All Notes
-   **Description:** Authenticated users shall be able to view a paginated or scrollable list of all notes they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user accesses the notes dashboard, then a list displaying the title and creation/last modified date of each of their notes is shown.
    *   The list shall be sortable by creation date (ascending/descending) and last modified date (ascending/descending).
    *   Each item in the list shall be clickable to view the note in detail.
-   **Priority:** High

### FR-006: View Individual Note
-   **Description:** Authenticated users shall be able to view the full details (title and content) of a specific note they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user selects a note from the list, then a dedicated view displaying the full title and rich-text content of that note is presented.
    *   The view shall include options to edit or delete the note.
-   **Priority:** High

### FR-007: Edit Existing Note
-   **Description:** Authenticated users shall be able to modify the title and rich-text content of any note they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user is viewing a specific note, when they activate the edit function and modify the title or content, then the system updates the note's details and records the `last_modified` timestamp.
    *   The system shall validate the updated content for integrity and rich-text formatting.
-   **Priority:** High

### FR-008: Delete Note
-   **Description:** Authenticated users shall be able to permanently delete any note they own.
-   **Acceptance Criteria:**
    *   Given an authenticated user attempts to delete a note, then a confirmation dialog shall appear asking for explicit confirmation.
    *   When the user confirms deletion, then the note and its associated data are permanently removed from the database.
    *   The user shall be redirected to the main notes list after successful deletion.
-   **Priority:** High

### FR-009: Secure Note Access
-   **Description:** The system shall enforce strict authorization, ensuring users can only access (view, create, edit, delete) their own notes.
-   **Acceptance Criteria:**
    *   Given an authenticated user attempts to access a note not associated with their user ID, then the system shall return an unauthorized error (e.g., HTTP 403 Forbidden).
    *   All API endpoints for note management shall verify user ownership before processing the request.
-   **Priority:** High

### FR-010: Search Notes (Phase 3)
-   **Description:** Authenticated users shall be able to search their notes by keywords in the title or content.
-   **Acceptance Criteria:**
    *   Given an authenticated user enters a search query in a search bar, when the query is submitted, then the system shall return a filtered list of the user's notes that match the keywords.
    *   Search shall be case-insensitive.
-   **Priority:** Medium (for Phase 3)

### FR-011: Note Categorization/Tagging (Phase 3)
-   **Description:** Authenticated users shall be able to assign categories or tags to their notes for better organization.
-   **Acceptance Criteria:**
    *   Given an authenticated user is creating or editing a note, then they can input or select multiple tags/categories for that note.
    *   Users shall be able to filter their note list by one or more assigned tags/categories.
-   **Priority:** Low (for Phase 3)

## Non-Functional Requirements
### Non-Functional Requirements for Notes App - 2025-10-06T07:45:00Z

### NFR-001: Performance
-   **Description:** The application shall provide a responsive user experience with efficient data retrieval and processing.
-   **Acceptance Criteria:**
    *   Note lists (up to 100 notes per user) shall load within 2 seconds.
    *   Individual notes shall load within 1 second.
    *   API response times for CRUD operations shall be less than 500ms under normal load (up to 50 concurrent users).
-   **Priority:** High

### NFR-002: Security
-   **Description:** The application shall protect user data and ensure secure interactions.
-   **Acceptance Criteria:**
    *   All user passwords shall be stored as salted hashes (e.g., using bcrypt).
    *   Data transmission between frontend and backend shall be encrypted (HTTPS).
    *   Authentication tokens (e.g., JWT) shall be short-lived and refreshed securely.
    *   Input validation shall be performed on all user-submitted data to prevent injection attacks (e.g., XSS, SQL injection).
    *   Rate limiting shall be implemented on login attempts to mitigate brute-force attacks.
-   **Priority:** High

### NFR-003: Usability
-   **Description:** The user interface shall be intuitive, easy to navigate, and consistent with the Clarity Design System.
-   **Acceptance Criteria:**
    *   The application shall adhere to Clarity Design System guidelines for components, typography, and spacing.
    *   Navigation menus shall be clear and logically organized.
    *   Form fields shall have clear labels, placeholders, and validation feedback.
    *   The application shall be fully responsive and usable across common desktop and mobile browser sizes.
-   **Priority:** High

### NFR-004: Scalability
-   **Description:** The application's architecture shall be designed to accommodate future growth in users and data.
-   **Acceptance Criteria:**
    *   The backend shall be stateless to allow for easy horizontal scaling.
    *   The database schema shall be optimized for efficient querying of notes and user data.
    *   Containerization (Docker) shall be used for easy deployment and scaling of frontend and backend services.
-   **Priority:** Medium

### NFR-005: Maintainability
-   **Description:** The codebase shall be well-structured, modular, and easy to understand for future development and debugging.
-   **Acceptance Criteria:**
    *   Code shall follow established coding standards for Angular (frontend) and the chosen backend framework.
    *   Key components, services, and API endpoints shall be documented with clear comments and explanations.
    *   Module separation for concerns (e.g., authentication, notes) shall be evident in the project structure.
-   **Priority:** Medium

## Data Requirements
### Data Requirements for Notes App - 2025-10-06T07:45:00Z

### Entities and Relationships

#### 1. User
-   **Description:** Represents a registered user of the notes application.
-   **Attributes:**
    *   `id`: UUID (Primary Key, unique identifier)
    *   `email`: String (Unique, required, used for login)
    *   `password_hash`: String (Required, securely hashed password)
    *   `created_at`: Timestamp (Automatically set on creation)
    *   `updated_at`: Timestamp (Automatically updated on modification)

#### 2. Note
-   **Description:** Represents a user's individual note.
-   **Attributes:**
    *   `id`: UUID (Primary Key, unique identifier)
    *   `user_id`: UUID (Foreign Key, links to `User.id`, required)
    *   `title`: String (Required, max length 255)
    *   `content`: Text (Optional, rich-text format supported)
    *   `created_at`: Timestamp (Automatically set on creation)
    *   `updated_at`: Timestamp (Automatically updated on modification)

#### Relationships:
*   `User` 1 -- M `Note`: One user can have many notes. Each note belongs to exactly one user.

## Interface Requirements
### Interface Requirements for Notes App - 2025-10-06T07:45:00Z

### UI/UX Requirements
*   **Design System:** Frontend UI shall strictly adhere to the Clarity Design System for all components (buttons, forms, data grids, navigation).
*   **Layout:**
    *   A primary responsive layout consistent with the base Angular Clarity boilerplate, featuring a header, sidebar (for navigation), and a main content area.
    *   Login/Registration pages shall have a dedicated, minimalist layout.
*   **Navigation:**
    *   Clear vertical navigation in the sidebar for accessing "My Notes", "Create New Note", and (optionally) "Categories/Tags".
    *   Header area for application branding and user-related actions (e.g., Logout).
*   **Note Editor:** A rich-text editor component for creating and editing note content.
*   **Forms:** All forms (login, registration, create/edit note) shall include clear validation feedback.

### API Requirements (RESTful)
*   **Base URL:** `/api/v1` (versioned for future compatibility).
*   **Authentication:** All authenticated endpoints shall require a valid JWT in the `Authorization` header (`Bearer <token>`).
*   **Error Handling:** API shall return meaningful HTTP status codes and JSON error messages for failures (e.g., 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 500 Internal Server Error).
*   **Endpoints:**

    *   **User Authentication:**
        *   `POST /auth/register`: Register a new user.
            *   Request Body: `{ "email": "string", "password": "string" }`
            *   Response: `{ "token": "string", "user": { "id": "uuid", "email": "string" } }`
        *   `POST /auth/login`: Authenticate an existing user.
            *   Request Body: `{ "email": "string", "password": "string" }`
            *   Response: `{ "token": "string", "user": { "id": "uuid", "email": "string" } }`
        *   `POST /auth/password-reset`: Initiate password reset.
            *   Request Body: `{ "email": "string" }`
            *   Response: `{ "message": "Password reset instructions sent." }`

    *   **Note Management:**
        *   `GET /notes`: Retrieve a list of the authenticated user's notes.
            *   Query Params: `sort_by` (e.g., "created_at", "updated_at"), `order` ("asc", "desc"), `page`, `limit`, `search` (Phase 3), `tag` (Phase 3).
            *   Response: `[{ "id": "uuid", "title": "string", "content_snippet": "string", "created_at": "timestamp", "updated_at": "timestamp" }]` (paginated).
        *   `GET /notes/{id}`: Retrieve a single note by ID (owned by the authenticated user).
            *   Response: `{ "id": "uuid", "title": "string", "content": "text", "created_at": "timestamp", "updated_at": "timestamp" }`
        *   `POST /notes`: Create a new note for the authenticated user.
            *   Request Body: `{ "title": "string", "content": "text" }`
            *   Response: `{ "id": "uuid", "title": "string", "content": "text", "created_at": "timestamp", "updated_at": "timestamp" }` (created note details).
        *   `PUT /notes/{id}`: Update an existing note by ID (owned by the authenticated user).
            *   Request Body: `{ "title": "string", "content": "text" }` (partial updates allowed).
            *   Response: `{ "id": "uuid", "title": "string", "content": "text", "created_at": "timestamp", "updated_at": "timestamp" }` (updated note details).
        *   `DELETE /notes/{id}`: Delete a note by ID (owned by the authenticated user).
            *   Response: `{ "message": "Note deleted successfully." }`
