Fix truncated error toast messages and expand image URL detection (#283, #253)

[srimon12]

Summary

Fixes #283
Fixes #253

Two bug fixes for the Web UI:

1. Truncated error messages (#283)

• Added message truncation at 250 characters with "..." suffix in ErrorNotifier to prevent long API error messages from overflowing the toast notification
• Improved getErrorMessage() fallback: when the extracted message is empty or whitespace-only, it now falls back to the generic fallback message instead of showing an empty toast

2. Image URL detection (#253)

• Fixed the image URL regex to support URLs with query strings and fragments (e.g., image.png?w=200, photo.jpeg#fragment)
• Added support for additional image formats: bmp, ico, tiff, tif, avif, heic, heif
• Added support for data:image/... URIs

Files Changed

• src/components/ToastNotifications/ErrorNotifier.jsx — +14/-3
• src/lib/get-error-message.js — +6/-1
• src/components/Points/PointImage.jsx — +7/-1

Verification

• 123/123 tests pass, no lint errors
• Image URL regex validated against 19 test cases (all pass), including query strings, fragments, data URIs, and new formats
• Error truncation verified in browser: short messages pass through unchanged, long messages truncated at 250 chars