fix: hover foncé + /api/ai/status + cache toolbar si pas de clé API

backend/ai_routes.py

@@ -10,13 +10,29 @@ from backend.ai import (
     ai_simplify, ai_change_tone, ai_translate, ai_explain, ai_summarize,
     ai_continue_writing, ai_custom_rewrite, ai_convert_to_list,
     ai_convert_to_table, ai_generate_frontmatter, ai_inline_complete,
-    ai_convert_to_canvas,
+    ai_convert_to_canvas, DEFAULT_PROVIDER, PROVIDERS,
 )
 
 logger = logging.getLogger("obsigate.ai_routes")
 router = APIRouter(prefix="/api/ai", tags=["AI"])
 
 
+@router.get("/status")
+async def api_status():
+    """Check if AI is configured and which providers are available."""
+    providers = {}
+    for name, cfg in PROVIDERS.items():
+        providers[name] = {
+            "available": bool(cfg["api_key"]),
+            "model": cfg["model"] if cfg["api_key"] else None,
+        }
+    return {
+        "configured": any(p["available"] for p in providers.values()),
+        "default_provider": DEFAULT_PROVIDER,
+        "providers": providers,
+    }
+
+
 class AIRequest(BaseModel):
     text: str = Field(..., description="Input text to process", min_length=1)
     instruction: Optional[str] = Field(None, description="Custom instruction for rewrite")