refactor(bruno): migrate API tests to Bruno DSL format

- Convert all existing .bru files from JSON to Bruno DSL format
- Remove obsolete files (conflicts/api.bru, kobo/Kobo Initialization.bru)
- Update auth configuration to use 'inherit' instead of explicit bearer tokens
- Add comprehensive documentation to all test files
- Improve test scripts with proper assertions and error handling

bruno/conflicts/List Conflicts.bru

@@ -7,30 +7,88 @@ meta {
 get {
   url: {{baseUrl}}/api/conflicts?status=unresolved
   body: none
-  auth: bearer
+  auth: inherit
 }
 
-headers: {
+headers {
   Authorization: Bearer {{token}}
 }
 
-docs: {
-  Lists all sync conflicts for the authenticated user.
-  
-  Query Parameters:
-  - status: Filter by resolution status (unresolved, user_resolved, auto_resolved, all)
-  
-  Response includes:
-  - conflicts: Array of conflict details
-  - total: Total number of conflicts
-  - unresolved: Number of unresolved conflicts
-  
-  Each conflict includes:
-  - id: Conflict UUID
-  - media_item_id: Associated book UUID
-  - media_item_title: Book title
-  - conflict_type: Type of conflict (progress, note, highlight)
-  - conflict_data: Side-by-side comparison of conflicting data
-  - resolution_status: Current status
-  - created_at: When conflict was detected
+settings {
+  encodeUrl: true
+  timeout: 0
+}
+
+docs {
+  ## List Conflicts
+
+  Lists all sync conflicts for the authenticated user with optional filtering.
+
+  **Method:** GET
+
+  **Endpoint:** /api/conflicts
+
+  **Authentication:** Bearer token
+
+  **Query Parameters:**
+  - `status` (string, optional): Filter by resolution status
+    - `unresolved`: Only unresolved conflicts (default)
+    - `user_resolved`: Conflicts resolved by user
+    - `auto_resolved`: Automatically resolved conflicts
+    - `all`: All conflicts regardless of status
+  - `type` (string, optional): Filter by conflict type
+    - `progress`: Reading progress conflicts
+    - `note`: Bookmark/note conflicts
+    - `highlight`: Highlight conflicts
+
+  **Response:**
+  - `conflicts` (array): Array of conflict objects
+  - `total` (number): Total number of conflicts matching filters
+  - `unresolved` (number): Number of unresolved conflicts
+
+  **Each Conflict Object:**
+  - `id` (string): Conflict UUID
+  - `media_item_id` (string): Associated book UUID
+  - `media_item_title` (string): Book title
+  - `conflict_type` (string): Type of conflict (progress, note, highlight)
+  - `conflict_data` (object): Side-by-side comparison of conflicting data
+    - `koreader`: Data from KOReader device
+    - `kobo`: Data from Kobo device
+    - `web`: Data from web interface
+  - `resolution_status` (string): Current status (unresolved, user_resolved, auto_resolved)
+  - `created_at` (string): ISO 8601 timestamp when conflict was detected
+
+  **Status Codes:**
+  - 200: Success
+  - 401: Unauthorized
+  - 500: Internal server error
+
+  **Example Request:**
+  ```
+  GET /api/conflicts?status=unresolved&type=progress
+  ```
+
+  **Example Response:**
+  ```json
+  {
+    "conflicts": [
+      {
+        "id": "conflict-uuid",
+        "media_item_id": "book-uuid",
+        "media_item_title": "Foundation",
+        "conflict_type": "progress",
+        "conflict_data": {
+          "koreader": { "percentage": 0.65, "epubcfi": "..." },
+          "kobo": { "percentage": 0.43, "epubcfi": "..." }
+        },
+        "resolution_status": "unresolved",
+        "created_at": "2026-01-31T12:00:00Z"
+      }
+    ],
+    "total": 1,
+    "unresolved": 1
+  }
+  ```
+
+  **Note:** Conflicts occur when multiple devices update the same book data without syncing first.
 }