Initial commit: Pixel AI comic/video creation platform

- FastAPI backend with SQLModel, Alembic migrations, AgentScope agents
- Next.js 15 frontend with React 19, Tailwind, Zustand, React Flow
- Multi-provider AI system (DashScope, Kling, MiniMax, Volcengine, OpenAI, etc.)
- All HTTP clients migrated from sync requests to async httpx
- Admin-managed API keys via environment variables
- SSRF vulnerability fixed in ensure_url()

backend/scripts/generate_error_codes_ts.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+"""
+Generate TypeScript ErrorCode enum from Python ErrorCode enum
+
+Usage:
+    python scripts/generate_error_codes_ts.py > ../frontend/src/lib/errors.ts
+
+This script synchronizes the frontend ErrorCode enum with the backend definition
+to ensure consistency across the project.
+"""
+
+import sys
+from pathlib import Path
+
+# Add src to path
+sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
+
+from src.utils.errors import ErrorCode
+
+
+def generate_typescript():
+    lines = [
+        "import { logger } from './utils/logger';",
+        "",
+        "/**",
+        " * Frontend Error Handling Module",
+        " * Provides standardized error codes, user-friendly messages, and retry logic",
+        " *",
+        " * Error codes are synchronized with backend:",
+        " * Format: 4-digit string",
+        " * - 0000: Success",
+        " * - 1xxx: General errors",
+        " * - 2xxx: Business errors",
+        " * - 3xxx: Task errors",
+        " * - 4xxx: AI service errors",
+        " * - 5xxx: Storage errors",
+        " */",
+        "",
+        "/**",
+        " * Error codes matching backend error responses",
+        " * Auto-synchronized with backend/src/utils/errors.py",
+        " */",
+        "export enum ErrorCode {",
+    ]
+
+    # Group error codes by category for better organization
+    categories = {
+        "0000": "Success",
+        "1": "General errors",
+        "2": "Business errors",
+        "3": "Task errors",
+        "4": "AI service errors",
+        "5": "Storage errors",
+    }
+
+    current_category = None
+
+    # Add backend error codes
+    for code in ErrorCode:
+        category = code.value[0] if code.value != "0000" else "0000"
+
+        if category != current_category:
+            if current_category is not None:
+                lines.append("")
+            if category in categories:
+                lines.append(f"  // {categories[category]} ({category}xxx)")
+            current_category = category
+
+        lines.append(f"  {code.name} = '{code.value}',")
+
+    # Add frontend-specific error codes
+    lines.extend([
+        "",
+        "  // Frontend-specific errors (not from backend)",
+        "  NETWORK_ERROR = 'NET01',",
+        "  TIMEOUT_ERROR = 'TIM01',",
+        "}",
+    ])
+
+    return "\n".join(lines)
+
+
+if __name__ == "__main__":
+    print(generate_typescript())