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Data Model: Fix Thinking Panel Re-Expand (095)

Feature: 095-fix-thinking-panel-expand
Date: 2026-03-18

This feature is UI-only. No persistence or API changes. The following describes the state and inputs that drive the thinking panel behavior.

Entities (logical)​

Message (existing)​

  • Completion status: Whether the message is final (streaming complete). Exposed as e.g. message.isFinal (boolean).
  • When true, the response is complete and the thinking panel should default to collapsed when the message is displayed.

Thinking panel state (local UI state)​

  • Expanded / collapsed: Boolean (e.g. showRawStream).
  • Initial value (per mount):
    • If message.isFinal === true → initial value is collapsed (false).
    • Else → initial value is the user default (e.g. from feature flag showThinking).
  • After mount: User can toggle; state is local to the component instance and resets on remount (e.g. when switching conversations).

User preference (existing)​

  • Default for streaming: e.g. feature flag showThinking (boolean, default true). Used only when the message is not final.

State transitions​

  • On mount: showRawStream is set once via useState(initializer) from message.isFinal and user default.
  • On user toggle: setShowRawStream updates local state; no persistence.
  • On unmount/remount: New instance; initial state is recomputed from current message.isFinal and user default.

No new entities or storage; only the rule for the initial value of existing local state is changed.