Add autocomplete status check and restructure test environments

Add Ollama autocomplete status endpoint to AI routes, update sync panel
UI to display autocomplete state, replace monolithic test compose files
with separate Linux/Windows variants, and add PowerShell build script
for Windows deployment

backend/ai_routes.py

@@ -37,10 +37,45 @@ async def api_status():
             "available": has_key,
             "model": PROVIDERS[name]["model"] if has_key else None,
         }
+
+    # ---- Autocomplete (Ollama) status ----
+    ollama_cfg = PROVIDERS.get("ollama", {})
+    ollama_url = (ollama_cfg.get("base_url") or "").rstrip("/v1").rstrip("/")
+    ollama_model = ollama_cfg.get("model", "")
+    autocomplete = {
+        "available": False,
+        "server_ok": False,
+        "model_loaded": False,
+        "model": ollama_model,
+        "error": None,
+    }
+    if ollama_url:
+        try:
+            import httpx
+            async with httpx.AsyncClient(timeout=5.0) as client:
+                # Check server health + list loaded models
+                r = await client.get(f"{ollama_url}/api/tags")
+                if r.status_code == 200:
+                    autocomplete["server_ok"] = True
+                    data = r.json()
+                    models = [m.get("name", "") for m in data.get("models", [])]
+                    # Check if our model (with or without tag) is loaded
+                    model_base = ollama_model.split(":")[0]
+                    autocomplete["model_loaded"] = any(
+                        m == ollama_model or m.startswith(model_base + ":")
+                        for m in models
+                    )
+                    autocomplete["available"] = autocomplete["model_loaded"]
+                else:
+                    autocomplete["error"] = f"HTTP {r.status_code}"
+        except Exception as e:
+            autocomplete["error"] = str(e)
+
     return {
         "configured": any(p["available"] for p in providers.values()),
         "default_provider": DEFAULT_PROVIDER,
         "providers": providers,
+        "autocomplete": autocomplete,
     }