Voice: recreate AudioRecorder each session to avoid stale native
state, improve permission handling (re-check after settings), show
feedback after 3 consecutive empty transcripts, allow STT-only mode
when TTS is unavailable.
Knowledge: hydrate IDs immediately after loading more pages so
scroll-based pagination doesn't stall at the bottom.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Tasks are not part of the knowledge API (backend rejects type=task).
When the Tasks tab is selected, fetch from /api/tasks and convert to
KnowledgeItem. Also removes per-type counts from tab labels to prevent
tabs from awkwardly resizing when counts load.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>