* perf: cache KaTeX module import as singleton across all renderer instances
KatexRenderer.svelte dynamically imports katex, mhchem, and the CSS on every component mount. When a message contains multiple math expressions, this triggers redundant module resolution for each one. Move the import promise to a module-level singleton using Svelte's context='module' script block so it loads once and is shared across all KatexRenderer instances.
* Update KatexRenderer.svelte
ResponseMessage compared the entire message object via JSON.stringify on every reactive tick to detect changes. During streaming, content changes on every token, making the two O(content_length) JSON.stringify calls always return different results — pure wasted work. Add a fast O(1) comparison on content and done fields first. When either differs (the common streaming case), skip straight to cloning. Only fall through to the expensive JSON.stringify comparison for infrequent changes like sources, annotations, or status updates.
New **pt-BR** translations for items introduced in the latest releases, plus a consistency/quality pass across existing strings (grammar, tone, capitalization, pluralization). Placeholders and hotkeys preserved. No logic changes.
Co-authored-by: Tim Baek <tim@openwebui.com>
Use align="start" (left-anchor) instead of align="end" (right-anchor) on
the user menu DropdownMenu.Content, combined with avoidCollisions={false}
to prevent Floating UI from auto-flipping back to end-alignment when the
menu's left edge is near the viewport boundary.
Previously, the right edge of the full-width trigger row tracked the
right edge of the sidebar, so resizing the sidebar wider caused the menu
to drift rightward. With start alignment the menu is anchored to the
left edge of the trigger, which is stable regardless of sidebar width.
