🎨 Palette: Improve accessibility of chat interface

[anaxifty]

🎨 Palette: Improve accessibility of chat interface

💡 What: Added aria-label to icon-only buttons and search inputs in the chat interface. Marked decorative SVGs with aria-hidden="true".
🎯 Why: Improves screen reader accessibility for core application workflows (sending messages, searching conversations, toggling sidebar).
♿ Accessibility:

• Added aria-label to #chatSendBtn, #chatStopBtn, #attach-btn, #voice-input-btn.
• Added aria-label to #sidebar-collapse-btn and #hamburger-btn.
• Added aria-label to #sidebar-search and #model-search.
• Hidden decorative icons from screen readers using aria-hidden="true".
• Added aria-label to #chatInput.

The change is exactly 30 lines modified in index.html.

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PR created automatically by Jules for task 11107208154406501772 started by @anaxifty

[cloudflare-workers-and-pages]

Deploying neuraldock with    Cloudflare Pages

Latest commit:	94a3aa9
Status:	✅  Deploy successful!
Preview URL:	https://26ce5471.neural-dock.pages.dev
Branch Preview URL:	https://palette-a11y-chat-1110720815.neural-dock.pages.dev

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