* feat(agent-edit): multi-session conversation history for the AI editor
The "Edit with AI" panel kept only one thread per stage in localStorage, and
"New conversation" deleted it, so previous conversations were unrecoverable.
Add a per-stage session list backed by IndexedDB (Dexie v12 `agentEditSessions`):
- "New conversation" now archives the current session and starts a fresh one
instead of deleting it; a history popover in the panel header lists past
sessions (auto-titled from the first user message) to switch back to or delete.
- One-time migration of the existing single-thread localStorage entry.
- The active session id is remembered per stage so a refresh restores it,
including a just-cleared empty session (clean slate survives reload).
- saveSession preserves the original createdAt and tombstones deleted ids so an
in-flight save can't resurrect a deleted session; switching stages drops the
previous thread synchronously so it can't leak into the new stage.
- Sessions are pruned to a soft cap per stage and removed when a course is
deleted.
- i18n for all 8 locales; unit tests for title derivation and the store.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* fix(types): drop redundant Window.SpeechRecognition augmentation conflicting with @assistant-ui/core
@assistant-ui/core's speech adapter declares Window.SpeechRecognition and
webkitSpeechRecognition globally as SpeechRecognitionConstructor. Three files
(prompt-input, use-audio-recorder, use-browser-asr) re-declared them as `any`,
which conflicts (TS2717) once that adapter's types are pulled into the program,
and the constructed instance then lacks the event handlers the code sets
(TS2339/2551). Rely on the global declaration and cast the instance to the local
rich shape. Takes `tsc --noEmit` back to zero.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Promote the editor-agent line to main: read-then-act editor agent (read_scene_content, regenerate_scene, regenerate_scene_actions, edit_interactive_html), a routable maic-agent model stage, the agent sidebar UI, interactive-scene runtime-error capture, and the timeline/script editor. Cross-reviewed and smoke-verified; see #777.
