Implements inline chat failure rendering in the ChatView with interactive reference affordances, proper attribution preservation in failure bubbles, and aligned error typing across the chat stream pipeline, with corresponding tests and documentation updates.
Fusion-Task-Id: FN-4054
Backend
- chat.ts now routes both regular chat and QuickChat through
createResolvedAgentSession instead of branching to createFnAgent for
the no-runtime-hint case. This removes the divergent path where
pi-ai's cleanupSessionResources(sessionId) could tear down resources
the next generation depends on.
- sendMessage's finally only disposes the agent if it still owns the
activeGenerations slot. A newer generation that has pre-empted us
cleans up its own agent in its own finally — disposing here would
yank the underlying CLI process out from under it.
- __setCreateFnAgent test helper now mirrors its mock into the
createResolvedAgentSession slot so existing test setups still work
after the unification.
Frontend
- Extract createChatStreamHandlers (RAF coalescing, accumulators,
tool-call dedup, fallback handling) — useChat and useQuickChat were
duplicating ~85 LOC each. Both now compose the shared factory.
- Move shared chat types into chatTypes.ts. The hooks re-export them
for backward compatibility with existing consumers.
- Removed per-message Markdown/plain-text eye toggles. A single
thread-level toggle in the chat header now flips every assistant
bubble (including the streaming one) between rendered Markdown and
plain text.
- Model-only chats hide the per-message agent identity row entirely;
the model name is already in the thread header.
Tests
- Updated ChatView tests to reflect the new render-toggle contract
(single header toggle drives all bubbles) and the model-only avatar
suppression.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
