- Added API and UI to clear chat history in Swarm Control while preserving node sync

- Implemented HTTP-based auto-update agent bootstrapper and core daemon

- Removed unused workflow profile and orphaned voice-interaction-handler skill

- Fixed voice chat response duplication and tool-belt instructions

- Fixed Node Registry persistence by adding missing db.commit() for online/offline status updates.
- Resolved 'Seed from Local' sync failures by correctly tracking mesh memberships in the TaskAssistant service.
- Enhanced frontend safety: disabled offline node selection and filtered source node candidates.
- Added 'Receiver Only' toggle for more granular control over multi-node synchronization.
- Corrected false-positive 'Source Node Disconnected' alert by verifying global connection status.
- Improved logging in Hub and Agent Nodes for better debugging of file transfer events.

M3 — Persistent Session Model:
  DB:
  - Session model: +sync_workspace_id, +attached_node_ids (JSON), +node_sync_status (JSON)
  - Migration: auto-adds 3 new columns to existing sessions table
  API (sessions router):
  - POST /sessions/        now auto-attaches user's default_node_ids from preferences
    on creation, generates sync_workspace_id, seeds 'pending' sync status
  - POST /sessions/{id}/nodes       attach nodes to an existing session
  - DELETE /sessions/{id}/nodes/{node_id}   detach a node
  - GET  /sessions/{id}/nodes       live sync status (merges DB + live registry)
  Schemas: NodeAttachRequest, NodeSyncStatusEntry, SessionNodeStatusResponse

M4 — Invite Token Validation:
  API (nodes router):
  - GET  /nodes/admin/{id}/config.yaml  generate ready-to-deploy agent_config.yaml
    (contains node_id, hub_url, grpc_endpoint, invite_token, skill toggles)
  - POST /nodes/validate-token          internal endpoint called by gRPC server;
    validates token against DB, returns skill_config for SandboxPolicy
  gRPC (grpc_server.py):
  - SyncConfiguration now calls POST /nodes/validate-token before registering node
  - HUB_API_URL env var controls this; empty = dev mode (skip validation)
  - Shell skill disabled by admin → empty allowed_commands in SandboxPolicy
  - Gracefully degrades if Hub is unreachable (logs warning, proceeds in dev)

- Removed all temporary root Python test scripts
- Secured remote_deploy.sh credentials using environment variables
- Added data/audio payloads directory to .gitignore
- Added automatic DB migration script (migrate.py) via uvicorn lifespan
- Applied major refactors to UI Voice Chat, Session handling, and unified React API configs
- Updated models and dependencies natively syncing with Nginx proxy features

Backend changes:
- db/models.py: add feature_name column to Session model
- db/models.py: confirmed is_archived col for soft-delete support
- api/schemas.py: expose feature_name on SessionCreate and Session schemas
- core/services/session.py: accept feature_name in create_session()
- api/routes/sessions.py: pass feature_name on creation; add GET /sessions/
  (filtered by user + feature), DELETE /sessions/{id}, DELETE /sessions/
- core/services/rag.py: auto-title session from first user message;
  keep session.provider_name in sync with the model actually used
- core/services/workspace.py: same auto-title + provider_name sync
  on the WebSocket chat path

Frontend changes:
- services/apiService.js: createSession() now sends feature_name and
  provider_name; add getUserSessions(), deleteSession(), deleteAllSessions()
- services/websocket.js: getSessionId() accepts providerName and forwards
  it to createSession so the DB record reflects the real model
- hooks/useCodeAssistant.js: pass 'coding_assistant' namespace + 'deepseek'
  provider; expose handleSwitchSession + sessionId to page
- hooks/useVoiceChat.js: pass 'voice_chat' namespace + 'gemini' provider;
  expose handleSwitchSession + sessionId to page
- components/SessionSidebar.js: new collapsible sidebar (collapsed by default)
  showing history sessions per feature; click to switch, hover to see token
  usage tooltip, per-card delete and bulk 'Clear All'; shows smart relative
  date and provider badge per session
- components/SessionSidebar.css: theme-aware CSS (inherits Tailwind
  light/dark palette; no forced dark mode)
- pages/CodingAssistantPage.js: mount SessionSidebar with coding_assistant
- pages/VoiceChatPage.js: mount SessionSidebar with voice_chat

Tests:
- tests/core/services/test_session_service.py: new unit tests for
  SessionService covering feature_name namespace variants and DB rollback
- tests/api/routes/test_sessions.py: unit tests for new session mgmt routes
  (list by feature, single delete, bulk delete, token usage)
- integration_tests/test_sessions_api.py: end-to-end tests for feature
  isolation, single delete, 404 on missing session, and bulk delete
  confirming cross-feature sessions are unaffected