Wave 15: Language learn, code snippets, vision AI, music playlist/lyrics - 100+ routes shipped

feat(wave-13): hub w12 update, cmd palette mount, auto-title/memory hooks, PDF-RAG, audio transcribe, calendar scheduler (13 features)

feat(wave4): 8 features — slash cmds, search, qr-share, /help, image gen, code sandbox, debate, cost tracker

feat: 10+ features — voice/dragdrop/shortcuts, Ollama+RAG citations, workflows+scheduled, share password+TTL, auto-memory, export-md

feat(prompt): explicit tool-use rules for news/URL/YouTube/SQL queries

fix(mistral): use official @ai-sdk/mistral provider for tool calling

fix(tools): currentTime accepts timezone+locale, fixes Gemini null-args bug

feat(providers): add OpenRouter + Cerebras + Mistral free providers

fix(google): disable thinking when tools enabled to avoid thought_signature error

feat: real provider rate-limit data via response headers

fix(generateImage): pre-warm Pollinations cache + better instructions

feat(cloud-sync): GitHub OAuth + Upstash Redis cross-device sync (LWW)

feat(model-picker): live discovery for Groq + GitHub Models (parallel to Google) — 'Quét live model' button per provider

fix(tools+models): repair UTF-8 mojibake in tool descriptions; trim model list to verified-working set; filter non-chat models from Google live discovery

feat(google/models): return all chat-capable models, remove name filter

feat(google): expand model list w/ Gemma-3 + live discovery /api/google/models

feat(wave10): A/B compare + diff view + self-critique + z-index hierarchy fix

feat(server): smart context compaction when near limit

feat(router): add auto model router based on prompt heuristics

feat(phase1-wave5): SSE streaming + share-link + BYOK + analytics + branching + a11y + nav-bar fix

feat(phase1-wave4): voice + tool-toggle + prompt-library + error-log + fix webSearch DDG

feat(phase1): theme toggle + slash commands + continue button + 4 new tools

fix(chat): surface real stream errors instead of generic mask

feat: rebuild UI with Next.js 15 + shadcn/ui + Vercel AI SDK