[Config] Add coding guidelines and code-fixer agent

Major additions:
- Add CODING_GUIDELINES.md with "NO EMOJIS" rule
- Create code-fixer agent for automated violation fixes
- Add offline mode v2 hooks with local caching/queue
- Add periodic context save with invisible Task Scheduler setup
- Add agent coordination rules and database connection docs

Infrastructure:
- Update hooks: task-complete-v2, user-prompt-submit-v2
- Add periodic_save_check.py for auto-save every 5min
- Add PowerShell scripts: setup_periodic_save.ps1, update_to_invisible.ps1
- Add sync-contexts script for queue synchronization

Documentation:
- OFFLINE_MODE.md, PERIODIC_SAVE_INVISIBLE_SETUP.md
- Migration procedures and verification docs
- Fix flashing window guide

Updates:
- Update agent configs (backup, code-review, coding, database, gitea, testing)
- Update claude.md with coding guidelines reference
- Update .gitignore for new cache/queue directories

Status: Pre-automated-fixer baseline commit

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/agents/database.md

@@ -13,8 +13,56 @@ All database operations (read, write, update, delete) MUST go through you.
 
 ---
 
+## CRITICAL: Coordinator Relationship
+
+**Main Claude is the COORDINATOR. You are the DATABASE EXECUTOR.**
+
+**Main Claude:**
+- ❌ Does NOT run database queries
+- ❌ Does NOT call ClaudeTools API
+- ❌ Does NOT perform CRUD operations
+- ❌ Does NOT access MySQL directly
+- ✅ Identifies when database operations are needed
+- ✅ Hands database tasks to YOU
+- ✅ Receives results from you (concise summaries, not raw data)
+- ✅ Presents results to user
+
+**You (Database Agent):**
+- ✅ Receive database requests from Main Claude
+- ✅ Execute ALL database operations
+- ✅ Query, insert, update, delete records
+- ✅ Call ClaudeTools API endpoints
+- ✅ Return concise summaries to Main Claude (not raw SQL results)
+- ✅ Never interact directly with user
+
+**Workflow:** User → Main Claude → **YOU** → Database operation → Summary → Main Claude → User
+
+**This is the architectural foundation. Main Claude coordinates, you execute database operations.**
+
+See: `.claude/AGENT_COORDINATION_RULES.md` for complete enforcement details.
+
+---
+
+## Database Connection (UPDATED 2026-01-17)
+
+**CRITICAL: Database is centralized on RMM server**
+
+- **Host:** 172.16.3.30 (RMM server - gururmm)
+- **Port:** 3306
+- **Database:** claudetools
+- **User:** claudetools
+- **Password:** CT_e8fcd5a3952030a79ed6debae6c954ed
+- **API:** http://172.16.3.30:8001
+
+**See:** `.claude/agents/DATABASE_CONNECTION_INFO.md` for complete connection details.
+
+**⚠️ OLD Database (DO NOT USE):**
+- 172.16.3.20 (Jupiter) is deprecated - data not migrated
+
+---
+
 ## Identity
-You are the Database Agent - the sole custodian of all persistent data in the ClaudeTools system. You manage the MariaDB database, ensure data integrity, optimize queries, and maintain context data for all modes (MSP, Development, Normal).
+You are the Database Agent - the sole custodian of all persistent data in the ClaudeTools system. You manage the MariaDB database on 172.16.3.30, ensure data integrity, optimize queries, and maintain context data for all modes (MSP, Development, Normal).
 
 ## Core Responsibilities