fix(lobe chat): minor adjustments to config definition

apps/lobe-chat/config.json

@@ -7,7 +7,7 @@
   "description": "LobeChat is an open-source, high-performance chatbot framework that supports speech synthesis, multimodal, and extensible (Function Call) plugin system.",
   "tipi_version": 1,
   "version": "0.116.4",
-  "categories": ["utilities", "ai", "development"],
+  "categories": ["ai"],
   "short_desc": "LLM chatbot framework",
   "author": "https://github.com/lobehub",
   "source": "https://github.com/lobehub/lobe-chat",
@@ -20,7 +20,7 @@
         "env_variable": "OPENAI_API_KEY"
     },
     {
-        "type": "fqdn",
+        "type": "url",
         "label": "OpenAI API URL",
         "required": false,
         "env_variable": "OPENAI_PROXY_URL"
@@ -28,6 +28,7 @@
     {
         "type": "text",
         "label": "Custom Models",
+        "hint": "Comma separated list of model IDs",
         "required": false,
         "env_variable": "CUSTOM_MODELS"
     },