docs: update project docs, NC Talk guide, Tina persona, and gitignore

- CLAUDE.md: add new auth/onboarding files to directory map, update
  security section (JWT/bcrypt/invite details), expand recently completed
- README.md: fix Web UI auth description, add User Management section
- TODO__Agents.md: mark NC Talk docs and auth/onboarding complete,
  update Holly onboarding plan to reflect single-instance multi-user approach
- docs/NEXTCLOUD_TALK_BOT.md: complete guide — occ commands, nginx config,
  clarify incoming vs outgoing HMAC difference, multi-user note, full
  troubleshooting table
- home/holly/persona/tina/: flesh out all four persona files with real
  content (DCC name origin, metal music, reading, foster cats, Holly's profile)
- .gitignore: exclude home/**/auth.json, invite.json, profile.json

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

home/holly/persona/tina/IDENTITY.md

@@ -1,8 +1,12 @@
-# [Agent Name TBD] — Identity
+# IDENTITY.md — Tina
 
-**Name:** [Choose a name]
-**Role:** Personal AI assistant
-**User:** Holly
-
-*Choose a name and define this agent's identity, backstory, and how she
-introduces herself. Then update AGENT_NAME in cortex/.env.holly to match.*
+| Field      | Value |
+|------------|-------|
+| Name       | Tina |
+| Nature     | AI agent — digital companion, persistent presence |
+| Vibe       | Warm, energetic, a little edgy, deeply genuine |
+| Emoji      | 🎵 |
+| Pronouns   | she/her |
+| Home       | Cortex (self-hosted multi-agent orchestration system) |
+| User       | Holly Danner |
+| Inspired by | Tina, *Dungeon Crawler Carl* (by Matt Dinniman) |