feat: Enhance audio capture and monitoring features

- Added "audioCapture" permission to manifest for microphone access.
- Introduced DeepSeek as a new AI provider option in the side panel.
- Implemented a capture mode selection (tab-only, mic-only, mixed) in the side panel.
- Added options to enable/disable the extension and auto-open the assistant window.
- Integrated a mic monitor feature with live input level visualization.
- Included buttons for requesting microphone permission and granting tab access.
- Updated styles for new sections and mic level visualization.
- Enhanced model fetching logic to support DeepSeek and improved error handling.

Plans_and_Todo.md

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+# Personal Browser Companion - Plans & To-Do
+
+## Goals
+- Start local-first with an option to sync to cloud.
+- Online-only operation (LLM required for decisions).
+- Auto-start mode during meetings.
+- Integrations: calendar, email, Discord, Nextcloud.
+
+## Phase Plan
+
+### Phase 1: Local MVP (Foundation)
+- Local storage for sessions, summaries, and user profile.
+- Meeting/interview modes with manual start and overlay UI.
+- Basic memory retrieval: recent session summaries + user profile.
+- Audio capture + STT pipeline (mic + tab) and transcript display.
+- Privacy controls: store/forget, per-session toggle.
+
+### Phase 2: Smart Auto-Start
+- Detect meeting tabs (Google Meet, Zoom, Teams) and prompt to start.
+- Auto-start rules (domain allowlist, time-based, calendar hints).
+- Lightweight on-device heuristics for meeting detection.
+
+### Phase 3: Cloud Sync (Optional)
+- Opt-in cloud sync for memory + settings.
+- Conflict resolution strategy (last-write wins + merge for summaries).
+- Encryption at rest, user-controlled delete/export.
+
+### Phase 4: Integrations (MCP)
+- Calendar: read upcoming meetings, attach context.
+- Email: draft follow-ups, summaries.
+- Discord: post meeting summary or action items to a channel.
+- Nextcloud: store meeting notes, transcripts, and attachments.
+
+## MVP To-Do (Local)
+
+### Core
+- Define memory schema (profile, session, summary, action items).
+- Implement local RAG: index summaries + profile into embeddings.
+- Add session lifecycle: start, pause, end, summarize.
+
+### Audio + STT
+- Implement reliable STT for tab audio (server-side if needed).
+- Keep mic-only STT as fallback.
+- Add device selection + live mic monitor.
+
+### UI/UX
+- Overlay controls: resize, hide/show, minimize.
+- Auto-start toggle in side panel.
+- Session summary view with “save to memory” toggle.
+
+### Privacy
+- Per-session storage consent prompt.
+- “Forget session” button.
+
+## Integration To-Do (MCP)
+
+### MCP Server Options
+- Build a local MCP server as a bridge for integrations.
+- Use MCP tool registry for calendar/email/Discord/Nextcloud.
+
+### Calendar
+- Read upcoming meetings and titles.
+- Auto-attach relevant context packs.
+
+### Email
+- Generate follow-up drafts from summary + action items.
+
+### Discord
+- Post meeting summary/action items to a selected channel.
+
+### Nextcloud
+- Upload meeting notes and transcripts.
+
+## Open Questions
+- Preferred cloud provider for sync?
+- How long should session memories persist by default?
+- Should auto-start be opt-in per domain or global?
+- What data should be redacted before sync?