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/docker_build.py

@@ -24,7 +24,7 @@ def build_image(instance_dir: str, dockerfile: str, tag: str, build_context: dic
     # Write Dockerfile
     dockerfile_path = Path(instance_dir) / "Dockerfile"
     dockerfile_path.write_text(dockerfile)
-    logger.info("Wrote Dockerfile to %s", dockerfile_path)
+    logger.debug("Wrote Dockerfile to %s", dockerfile_path)
 
     # Write build context files
     if build_context:
@@ -39,10 +39,10 @@ def build_image(instance_dir: str, dockerfile: str, tag: str, build_context: dic
             
             full_path.parent.mkdir(parents=True, exist_ok=True)
             full_path.write_text(content)
-            logger.info("Wrote build context file: %s", full_path)
+            logger.debug("Wrote build context file: %s", full_path)
 
     # Build image
-    logger.info("Building Docker image with tag: %s", tag)
+    logger.debug("Building Docker image with tag: %s", tag)
     cmd = [
         "docker", "build",
         "-t", tag,
@@ -57,7 +57,7 @@ def build_image(instance_dir: str, dockerfile: str, tag: str, build_context: dic
             text=True,
             timeout=300,  # 5 minute timeout for builds
         )
-        logger.info("Docker build completed: returncode=%d", result.returncode)
+        logger.debug("Docker build completed: returncode=%d", result.returncode)
         if result.returncode != 0:
             logger.error("Docker build failed: %s", result.stderr[:1000])
         return result.returncode, result.stdout, result.stderr