Add client-mode FastGPT routing

test/api/fastapi-browser-addon.http

@@ -0,0 +1,85 @@
+@baseUrl = http://127.0.0.1:8000
+###
+@sessionId = a1123
+@timeStamp = 202603310303
+@clientMode = browser_addon
+###
+GET {{baseUrl}}
+
+HTTP/1.1 200  - OK
+date: Tue, 28 Jul 2026 00:36:56 GMT
+server: uvicorn
+content-length: 32
+content-type: application/json
+connection: close
+###
+DELETE {{baseUrl}}/delete_session
+content-type: application/json
+
+{
+    "sessionId": "{{sessionId}}",
+    "timeStamp": "{{$timestamp}}",
+    "clientMode": "{{clientMode}}"
+}
+
+HTTP/1.1 200  - OK
+date: Tue, 28 Jul 2026 00:36:57 GMT
+server: uvicorn
+content-length: 71
+content-type: application/json
+connection: close
+###
+POST {{baseUrl}}/chat?stream=true
+content-type: application/json
+
+{
+    "sessionId": "{{sessionId}}",
+    "timeStamp": "{{timeStamp}}",
+    "text": "hi",
+    "clientMode": "{{clientMode}}",
+    "needFormUpdate": true,
+    "useTextChunk": true
+}
+
+HTTP/1.1 200  - OK
+date: Tue, 28 Jul 2026 00:36:58 GMT
+server: uvicorn
+content-type: text/event-stream; charset=utf-8
+connection: close
+transfer-encoding: chunked
+###
+POST {{baseUrl}}/get_info
+content-type: application/json
+
+{
+    "sessionId": "{{sessionId}}",
+    "timeStamp": "{{timeStamp}}",
+    "key": "hphm1",
+    "clientMode": "{{clientMode}}"
+}
+
+HTTP/1.1 200  - OK
+date: Tue, 28 Jul 2026 00:37:07 GMT
+server: uvicorn
+content-length: 97
+content-type: application/json
+connection: close
+###
+POST {{baseUrl}}/set_info
+content-type: application/json
+
+{
+    "sessionId": "{{sessionId}}",
+    "timeStamp": "{{timeStamp}}",
+    "key": "hphm1",
+    "value": "沪A8939",
+    "clientMode": "{{clientMode}}"
+}
+
+HTTP/1.1 200  - OK
+date: Tue, 28 Jul 2026 00:37:00 GMT
+server: uvicorn
+content-length: 70
+content-type: application/json
+connection: close
+###