F05+TokenSaver: export dropdown, Token Saver banner in chat, improved PDF/MD (v2.7.1)

v2.8: fix message bubble overflow (mobile), cancel=[Prekinuto], auto-title after 1st exchange

v2.7: Add Persistent Memory + Multi-Agent Pipeline features

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Fix message

fix: message overflow — pre-wrap + max-width 100% on message-bubble (v2.2.1)

feat: auto build-preview panel + immediate markdown render on done event

v3.0: persistent memory + token tracker + file manager + plotly charts + codemirror + multi-agent

v2.5: /api/settings bugfix + 8 improvements (copy, badge, collapsible, mermaid, lightbox, stop, tables, offline)

v2.4: mdSafe + RAF throttle + marked+hljs + HTML Preview button

v2.3: compact token meter on mobile

v2.3: static/css/app.css

fix(mobile): compact presets scroll, stack form-rows, reduce padding

v2.2.0: styles for all new features

Update static/css/app.css: features v2.2

fix: body flex layout + 100dvh mobile keyboard + chat scroll on focus

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feat: complete PWA — 19 providers, Cloudflare AI, 7 tools, dynamic models, sw.js, icons