Fix wrong-prefix silent ignore and Minimax image understand host

- Remove "Use .cmd for this role" reply when owner uses wrong prefix;
  wrong-prefix commands are now silently ignored for all users
- Fix AIImageUnderstandConfig default api_host to api.minimax.chat
  (minimax-coding-plan-mcp routes all calls there, not api.minimax.io)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -2,4 +2,4 @@ TG_API_ID=123456
 TG_API_HASH=your_api_hash_here
 SESSION_DIR=sessions
 ACCOUNTS_JSON=[{"name":"personal","session":"personal"},{"name":"work","session":"work"}]
-# AI_CONFIG={"default_model":"mm","context_messages":12,"prompt":{"root":"prompts/ai","system_file":"system.md","parts_dir":"parts"},"image_understand":{"api_key":"your_minimax_token_plan_key_here","api_host":"https://api.minimax.io","command":["uvx","minimax-coding-plan-mcp","-y"]},"providers":{"minimax":{"api_key":"your_minimax_api_key_here","base_url":"https://api.minimax.chat/v1"},"openrouter":{"api_key":"your_openrouter_api_key_here","base_url":"https://openrouter.ai/api/v1"}},"models":{"mm":{"provider":"minimax","model":"MiniMax-Text-01"},"or":{"provider":"openrouter","model":"openai/gpt-4o-mini"}}}
+# AI_CONFIG={"default_model":"mm","context_messages":12,"prompt":{"root":"prompts/ai","system_file":"system.md","parts_dir":"parts"},"image_understand":{"api_key":"your_minimax_token_plan_key_here","api_host":"https://api.minimax.chat","command":["uvx","minimax-coding-plan-mcp","-y"]},"providers":{"minimax":{"api_key":"your_minimax_api_key_here","base_url":"https://api.minimax.chat/v1"},"openrouter":{"api_key":"your_openrouter_api_key_here","base_url":"https://openrouter.ai/api/v1"}},"models":{"mm":{"provider":"minimax","model":"MiniMax-Text-01"},"or":{"provider":"openrouter","model":"openai/gpt-4o-mini"}}}

app/commands/dispatcher.py

@@ -80,10 +80,6 @@ class CommandDispatcher:
 
         expected_prefix = definition.expected_prefix(is_owner)
         if parsed.prefix != expected_prefix:
-            if is_owner:
-                await message.reply_text(
-                    f"Use {expected_prefix}{definition.name} for this account role"
-                )
             return True
 
         ctx = CommandContext(

app/config.py

@@ -51,7 +51,7 @@ class AIModelConfig:
 @dataclass(slots=True)
 class AIImageUnderstandConfig:
     api_key: str
-    api_host: str = "https://api.minimax.io"
+    api_host: str = "https://api.minimax.chat"
     command: tuple[str, ...] = ("uvx", "minimax-coding-plan-mcp", "-y")
     timeout: float | None = None
 

config.example.json

@@ -22,13 +22,13 @@
     },
     "image_understand": {
       "api_key": "your_minimax_token_plan_key_here",
-      "api_host": "https://api.minimax.io",
+      "api_host": "https://api.minimax.chat",
       "command": ["uvx", "minimax-coding-plan-mcp", "-y"]
     },
     "providers": {
       "minimax": {
         "api_key": "your_minimax_api_key_here",
-        "base_url": "https://api.minimax.chat/v1"
+        "base_url": "https://api.minimax.io/v1"
       },
       "openrouter": {
         "api_key": "your_openrouter_api_key_here",