Initial commit with CI workflow

- Flask backend with SSH discovery and Claude AI integration
- React/Vite frontend with Tailwind CSS
- Docker multi-stage build
- Gitea Actions workflow for container builds

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/config.py

@@ -0,0 +1,65 @@
+import os
+import base64
+from dataclasses import dataclass
+from typing import Optional
+
+
+@dataclass
+class Config:
+    """Application configuration loaded from environment variables."""
+
+    ssh_private_key: str
+    uptime_kuma_url: str
+    uptime_kuma_api_key: str
+    claude_api_key: str
+    dev_mode: bool = False
+
+    @classmethod
+    def from_env(cls) -> "Config":
+        """Load configuration from environment variables."""
+        ssh_key_b64 = os.environ.get("SSH_PRIVATE_KEY", "")
+
+        # Decode base64 SSH key
+        try:
+            ssh_private_key = base64.b64decode(ssh_key_b64).decode("utf-8") if ssh_key_b64 else ""
+        except Exception:
+            ssh_private_key = ssh_key_b64  # Allow plain text for development
+
+        return cls(
+            ssh_private_key=ssh_private_key,
+            uptime_kuma_url=os.environ.get("UPTIME_KUMA_URL", "http://localhost:3001"),
+            uptime_kuma_api_key=os.environ.get("UPTIME_KUMA_API_KEY", ""),
+            claude_api_key=os.environ.get("CLAUDE_API_KEY", ""),
+            dev_mode=os.environ.get("DEV_MODE", "false").lower() == "true",
+        )
+
+    def validate(self) -> list[str]:
+        """Validate configuration and return list of errors."""
+        errors = []
+        if not self.ssh_private_key:
+            errors.append("SSH_PRIVATE_KEY is required")
+        if not self.uptime_kuma_url:
+            errors.append("UPTIME_KUMA_URL is required")
+        if not self.uptime_kuma_api_key:
+            errors.append("UPTIME_KUMA_API_KEY is required")
+        if not self.claude_api_key:
+            errors.append("CLAUDE_API_KEY is required")
+        return errors
+
+
+# Global config instance
+_config: Optional[Config] = None
+
+
+def get_config() -> Config:
+    """Get the global configuration instance."""
+    global _config
+    if _config is None:
+        _config = Config.from_env()
+    return _config
+
+
+def set_dev_mode(enabled: bool) -> None:
+    """Update dev mode setting."""
+    config = get_config()
+    config.dev_mode = enabled