fix: use ollama/qwen3-coder-next instead of anthropic, remove stale ANTHROPIC_MODEL ref

app/main.py

@@ -68,8 +68,8 @@ OPENCODE_PASSWORD = os.environ.get("OPENCODE_PASSWORD", "")
 SIDECAR_URL = os.environ.get("SIDECAR_URL", "http://sin:4098").rstrip("/")
 
 # Model to use for opencode sessions.
-OPENCODE_MODEL = os.environ.get("OPENCODE_MODEL", "claude-sonnet-4-6")
-OPENCODE_PROVIDER = os.environ.get("OPENCODE_PROVIDER", "anthropic")
+OPENCODE_MODEL = os.environ.get("OPENCODE_MODEL", "qwen3-coder-next:q4_K_M")
+OPENCODE_PROVIDER = os.environ.get("OPENCODE_PROVIDER", "ollama")
 
 if not PREVIEW_MODE and not OPENCODE_PASSWORD:
     raise RuntimeError("OPENCODE_PASSWORD not set (set PREVIEW_MODE=1 to bypass)")
@@ -494,7 +494,7 @@ async def index(request: Request) -> Any:
         "chat.html",
         {
             "user": user,
-            "model": ANTHROPIC_MODEL or "preview",
+            "model": OPENCODE_MODEL,
             "cart": cart,
             "pilot_name":   (cart.operator_name if cart and cart.operator_name else "you"),
             "persona_name": (cart.persona_name if cart and cart.persona_name else ""),