Users couldn't see Excalidraw's built-in Save as / Export image options:
the app's custom toolbar was drawn exactly on top of the native hamburger
menu button, hiding it. Removed the overlay and integrated Back to
Library / Save now / Rename into the native menu, so the native export
formats (.excalidraw file, PNG, SVG, clipboard) are now reachable.
Viktor asked for exports to work via the native Excalidraw feature and
for drawings to be renameable by clicking their name.
Rename: new PATCH /api/drawings/{id} endpoint (server-side name
sanitization, 409 on conflict) + click-to-rename title pill in the
editor (updates URL in place) + Rename button/modal in the dashboard.
Existing GET/PUT/DELETE semantics unchanged for API compatibility
(emo's upload pipeline). Added main_test.go (httptest) covering rename
+ existing handler behavior; dashboard rows now DOM-built (XSS-safe).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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