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/admin/list_users.md

@@ -7,17 +7,17 @@ List all users in the system (admin only).
 
 ## Query Parameters
 
-| Parameter | Type | Required | Description |
-|-----------|------|-----------|-------------|
-| limit | integer | No | Maximum number of users to return (default: 50) |
-| offset | integer | No | Number of users to skip (default: 0) |
-| search | string | No | Search by email or username |
+| Parameter | Type    | Required | Description                                     |
+| --------- | ------- | -------- | ----------------------------------------------- |
+| limit     | integer | No       | Maximum number of users to return (default: 50) |
+| offset    | integer | No       | Number of users to skip (default: 0)            |
+| search    | string  | No       | Search by email or username                     |
 
 ## Request Headers
 
-| Header | Type | Required | Description |
-|--------|------|-----------|-------------|
-| Authorization | string | Yes | Bearer token (must have admin role) |
+| Header        | Type   | Required | Description                         |
+| ------------- | ------ | -------- | ----------------------------------- |
+| Authorization | string | Yes      | Bearer token (must have admin role) |
 
 ### Example Request
 
@@ -53,26 +53,26 @@ Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
 
 ### Response Fields
 
-| Field | Type | Description |
-|-------|------|-------------|
-| `id` | string | User ID (UUID) |
-| `email` | string | Email address |
-| `username` | string | Username |
-| `first_name` | string | First name (optional) |
-| `last_name` | string | Last name (optional) |
-| `role` | string | User role (`"user"` or `"admin"`) |
-| `theme` | string | Theme preference (optional) |
-| `max_devices` | integer | Maximum number of devices allowed |
-| `device_count` | integer | Current number of registered devices |
-| `created_at` | string | Account creation timestamp (ISO 8601) |
-| `updated_at` | string | Last update timestamp (ISO 8601) |
-| `total` | integer | Total number of users matching query |
-| `limit` | integer | Limit applied to this request |
-| `offset` | integer | Offset applied to this request |
+| Field          | Type    | Description                           |
+| -------------- | ------- | ------------------------------------- |
+| `id`           | string  | User ID (UUID)                        |
+| `email`        | string  | Email address                         |
+| `username`     | string  | Username                              |
+| `first_name`   | string  | First name (optional)                 |
+| `last_name`    | string  | Last name (optional)                  |
+| `role`         | string  | User role (`"user"` or `"admin"`)     |
+| `theme`        | string  | Theme preference (optional)           |
+| `max_devices`  | integer | Maximum number of devices allowed     |
+| `device_count` | integer | Current number of registered devices  |
+| `created_at`   | string  | Account creation timestamp (ISO 8601) |
+| `updated_at`   | string  | Last update timestamp (ISO 8601)      |
+| `total`        | integer | Total number of users matching query  |
+| `limit`        | integer | Limit applied to this request         |
+| `offset`       | integer | Offset applied to this request        |
 
 ## Error Responses
 
-| Code | Description |
-|------|-------------|
-| 401 | Invalid or expired token |
-| 403 | User does not have admin privileges |
+| Code | Description                         |
+| ---- | ----------------------------------- |
+| 401  | Invalid or expired token            |
+| 403  | User does not have admin privileges |