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/websocket_connect.bru

@@ -1,5 +1,5 @@
 meta {
-  name: "WebSocket - Connect and Receive Updates"
+  name: WebSocket - Connect and Receive Updates
   type: websocket
   seq: 1
 }
@@ -9,22 +9,63 @@ vars {
 }
 
 websocket {
-  url: "{{ baseUrl }}/ws/sync?token={{ token }}"
+  url: {{baseUrl}}/ws/sync?token={{token}}
   body: {
     type: "ping",
     timestamp: "2026-01-30T20:00:00Z"
   }
-  auth: {
-    type: bearer
-    token: "{{ token }}"
-  }
-  headers: {
-    Authorization: "Bearer {{ token }}"
-  }
+  auth: inherit
 }
 
-assert {
-  res.status == 101
-  res.headers.contains("Connection", "upgrade")
-  res.headers.contains("Upgrade", "websocket")
+headers {
+  Authorization: Bearer {{token}}
+}
+
+script:post-response {
+  function onResponse(res) {
+    tests('Status is 101 (Switching Protocols)', res.getStatus() === 101);
+    const headers = res.getHeaders();
+    const connection = headers.get("Connection");
+    const upgrade = headers.get("Upgrade");
+    tests('Connection header has upgrade', connection && connection.toLowerCase().includes("upgrade"));
+    tests('Upgrade header is websocket', upgrade && upgrade.toLowerCase().includes("websocket"));
+  }
+  onResponse(res);
+}
+
+settings {
+  encodeUrl: true
+  timeout: 0
+}
+
+docs {
+  ## WebSocket - Connect and Receive Updates
+
+  Establishes a WebSocket connection for real-time sync updates.
+
+  **Type:** WebSocket
+
+  **Endpoint:** /ws/sync?token={token}
+
+  **Authentication:** Bearer token (via query parameter)
+
+  **Query Parameters:**
+  - `token` (string): JWT access token
+
+  **Request Body:**
+  - `type` (string): Message type (ping, subscribe, unsubscribe)
+  - `timestamp` (string): ISO 8601 timestamp
+
+  **Expected Response:**
+  - Status: 101 Switching Protocols
+  - Headers:
+    - `Connection`: upgrade
+    - `Upgrade`: websocket
+
+  **Status Codes:**
+  - 101: Switching Protocols - WebSocket established
+  - 401: Unauthorized
+  - 500: Internal server error
+
+  **Note:** WebSocket connection allows real-time push notifications for sync updates, progress changes, and device activity.
 }