feat: production Docker, Playwright tests, settings API, and bug fixes

- Add user management endpoints (register, list, delete, change password)
- Add API key management (create, list, delete)
- Add settings persistence endpoints (get, put)
- Wire settings dialog to real backend (People, API Keys, System, Security)
- Fix login auth flow (window.location.href for full reload)
- Fix download URLs returning 401 (make public since UUIDs are unguessable)
- Fix border tool shadowColor validation (accept 6-8 hex digits)
- Fix remove-bg alpha matting fallback (retry without on failure)
- Fix AI tool silent fallbacks (report errors instead of no-ops)
- Add checkerboard background to before/after slider for transparency
- Add progress bars to all AI tool components
- Add Playwright E2E test suite (131 tests across 9 test files)
- Rewrite Dockerfile for production (tsx runtime, pre-baked AI models)
- Add .dockerignore for faster builds
- Add proper accessible labels to login form

packages/ai/python/remove_bg.py

@@ -16,12 +16,17 @@ def main():
         with open(input_path, "rb") as f:
             input_data = f.read()
 
-        output_data = remove(
-            input_data,
-            alpha_matting=True,
-            alpha_matting_foreground_threshold=240,
-            alpha_matting_background_threshold=10,
-        )
+        # Try with alpha matting first for better edges, but fall back
+        # without it if the image triggers the known rembg matting error
+        try:
+            output_data = remove(
+                input_data,
+                alpha_matting=True,
+                alpha_matting_foreground_threshold=240,
+                alpha_matting_background_threshold=10,
+            )
+        except Exception:
+            output_data = remove(input_data)
 
         with open(output_path, "wb") as f:
             f.write(output_data)