Rewrite Gmail tool: IMAP/SMTP + App Password (drop OAuth2) ...

Standard library only (imaplib, smtplib) — no google-api dependencies.
Auth via GMAIL_ADDRESS + GMAIL_APP_PASSWORD env vars.
Pagination via integer offset instead of page token.
Message IDs are IMAP UIDs (shown in list output).
html2text still used for HTML→plain conversion on read.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Add Gmail tool: send, list, list_unread, read, reply via Gmail API ...

- tools/gmail.py: single tool with 'action' param routing to 5 operations.
  Prefers text/plain MIME part; converts HTML→text via html2text for
  HTML-only emails. Truncates body at 5000 chars. Marks message read on
  'read'. Reply preserves thread via threadId + In-Reply-To/References headers.
  Outgoing emails sent as multipart/alternative (plain + html).
- tools/gmail_auth.py: one-time OAuth2 setup script (InstalledAppFlow).
  Reads gmail_credentials.json, saves token to gmail_token.json.
- tools/enabled.json: add gmail to global tool list
- Dependencies: google-api-python-client, google-auth-oauthlib, html2text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Migrate storage to PostgreSQL with SQLite fallback; misc fixes ...

- Add PgSessionStore (asyncpg pool) and PgMemoryStore replacing aiosqlite
- Keep SqliteSessionStore + SqliteMemoryStore for zero-dependency quick start
- Selection logic in deps.py: DATABASE_URL set → PG, else → SQLite
- Add asyncpg>=0.29 to dependencies; add DATABASE_URL / DB_PATH to config
- Add RESPONSE HYGIENE rule to persona: never echo tool output or plan state
- Add developer profile user tools: weather, internal_monitor
- Update README: developer profile, DB section, current tool/profile state

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

self edited

Add project docs, tool manuals, and initial user tools ...

- CLAUDE.md: comprehensive project reference for Claude Code sessions
- manuals/write_tool.md: full format reference with working example
- tools/_template.py: canonical module-level tool format
- tools/enabled.json: auto-include list (get_current_datetime, user_notes)
- get_current_datetime, user_notes: first Navi-written tools

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>