chore: clean up debugging logs and console prints

Frontend:
- Remove 18 console.log/warn/error statements from terminal.tsx
- Remove console.warn from icon.tsx

Backend:
- Downgrade routine logger.info to logger.debug in tool_instances.py, terminal.py,
  terminal_session.py, terminal_manager.py, auth.py, docker_build.py, clone.py,
  config_profiles.py, user_config.py
- Keep important lifecycle events as logger.info:
  * Instance creation, start, running state
  * Docker build success/failure
  * Terminal session creation and reset
  * Auth success and user creation
  * Readiness probe success
  * Tunnel creation/stop

apps/api/src/services/clone.py

@@ -42,7 +42,7 @@ def clone_repository(
         str(clone_path),
     ]
 
-    logger.info("Cloning repository %s (branch: %s) into %s", remote_url, branch, clone_path)
+    logger.debug("Cloning repository %s (branch: %s) into %s", remote_url, branch, clone_path)
     result = subprocess.run(
         cmd,
         capture_output=True,
@@ -55,7 +55,7 @@ def clone_repository(
         logger.error("Git clone failed: %s", result.stderr)
         raise RuntimeError(f"Failed to clone repository: {result.stderr}")
 
-    logger.info("Successfully cloned repository into %s", clone_path)
+    logger.debug("Successfully cloned repository into %s", clone_path)
     return str(clone_path)
 
 
@@ -94,4 +94,4 @@ def remove_clone_directory(instance_dir: str) -> None:
     if clone_path.exists():
         import shutil
         shutil.rmtree(clone_path)
-        logger.info("Removed clone directory: %s", clone_path)
+        logger.debug("Removed clone directory: %s", clone_path)