ux(chat): show activity indicator during file writes and improve post-interview flow

[davewaring]

Summary

• Fix silent gap when AI writes files after a conversation — typing indicator now shows "Writing to your library..." during tool calls
• Update base agent template so the AI updates the owner profile after every conversation (not just the first) and tells the user where to find created files

Changes

ChatPanel.tsx

• Show TypingIndicator during active tool calls (memory_write, memory_read, etc.) even after the assistant has started replying
• Previously the indicator was only shown before the first assistant message — file writes happened silently

Base AGENT.md (starter-pack template)

• Post-interview: AI now tells the user what was created and where to find it ("Done — I've set up your Finance project. You can find it in the sidebar.")
• Ongoing Partnership: added explicit instruction to update me/profile.md after every conversation, not just the first interview
• Addresses first-run-feedback Add intent layer (transient skill routing + workflow lock) and fix /message metadata validation #4 (no navigation after plan creation), Onboarding flow updates — settings UX, back nav, default model, message fix #5 (profile doesn't accumulate), Onboarding template overhaul + project context + model fix #10 (AGENT.md not updated by Haiku)

Test plan

• Start a new project conversation — verify "Writing to your library..." indicator appears while files are being written
• Verify AI tells the user where to find created files after writing spec/plan
• Run a second conversation in a different project — verify me/profile.md gets updated with new info
• Verify indicator disappears after writes complete

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