docs: update comprehensive API documentation and project guides

This commit updates all documentation files throughout the project:

- Updated IMPLEMENTATION_PLAN.md with new implementation details
- Updated PROJECT_GUIDELINES.md with coding standards and practices
- Updated README.md with current project information
- Updated SCREENSHOT_AUTOMATION.md with new automation details
- Added TEST_DATA.md with test fixtures data
- Updated cover_image_serving_plan.md with static URL patterns

Documentation API updates:
- Updated API reference documentation for all endpoints including:
  - Authentication (login, logout, register, refresh_token)
  - Book matching (auto_link, bulk_link, link_book, search)
  - Collections (CRUD operations, shelf mappings, auto-assign rules)
  - Conflicts (bulk operations, resolve/dismiss)
  - Devices (registration, approval, shelf management)
  - Highlights (create, update, delete, get)
  - Kobo sync (bookmark, markup, initialization, sync)
  - KOReader sync (library, metadata, bookmarks, progress)
  - Libraries (CRUD, folders, media items, stats)
  - Media items (bulk operations, CRUD)
  - Notes (CRUD operations)
  - OPDS (acquisition, feeds, publication)
  - Progress (reading progress tracking)
  - Queue (device queue management)
  - Ratings (star ratings)
  - Scanner (watch mode, scan operations)
  - Sync protocols (Kobo, KOReader)
  - Users (profile, password, admin operations)
  - WebSocket protocols

- Updated user guides (admin, dashboard, settings, sync)
- Updated device setup guides (Kobo, KOReader)
- Updated developer guides (testing, contributing, operations)
- Updated scripts/README.md

docs/developer/api/users/update_profile.md

@@ -3,6 +3,7 @@
 Update user profile information. Supports both self-edit and admin modes.
 
 **Endpoints**:
+
 - Self-edit: `PUT /api/auth/profile`
 - Admin edit: `PUT /api/auth/profile/:id`
 
@@ -15,13 +16,13 @@ Users can update their own profile. All fields are optional.
 
 ### Request Body
 
-| Field | Type | Required | Description |
-|--------|------|-----------|-------------|
-| username | string | No | New username (must be unique, 3-50 chars) |
-| email | string | No | New email (must be unique, valid format) |
-| first_name | string | No | User's first name |
-| last_name | string | No | User's last name |
-| theme | string | No | Theme preference |
+| Field      | Type   | Required | Description                               |
+| ---------- | ------ | -------- | ----------------------------------------- |
+| username   | string | No       | New username (must be unique, 3-50 chars) |
+| email      | string | No       | New email (must be unique, valid format)  |
+| first_name | string | No       | User's first name                         |
+| last_name  | string | No       | User's last name                          |
+| theme      | string | No       | Theme preference                          |
 
 ### Example Request
 
@@ -43,9 +44,9 @@ Admins can update any user by providing the user ID in the URL. Additionally sup
 
 ### Additional Request Body Fields (Admin Only)
 
-| Field | Type | Required | Description |
-|--------|------|-----------|-------------|
-| role | string | No | New role: "user" or "admin" |
+| Field | Type   | Required | Description                 |
+| ----- | ------ | -------- | --------------------------- |
+| role  | string | No       | New role: "user" or "admin" |
 
 ### Example Admin Request
 
@@ -75,10 +76,10 @@ Admins can update any user by providing the user ID in the URL. Additionally sup
 
 ## Error Responses
 
-| Code | Description |
-|------|-------------|
-| 400 | Invalid input data or invalid role |
-| 401 | Invalid or expired token |
-| 403 | Admin access required (admin mode only) |
-| 404 | User not found (admin mode only) |
-| 409 | Username or email already taken |
+| Code | Description                             |
+| ---- | --------------------------------------- |
+| 400  | Invalid input data or invalid role      |
+| 401  | Invalid or expired token                |
+| 403  | Admin access required (admin mode only) |
+| 404  | User not found (admin mode only)        |
+| 409  | Username or email already taken         |