feat: Add Sequential Thinking to Code Review + Frontend Validation

Enhanced code review and frontend validation with intelligent triggers:

Code Review Agent Enhancement:
- Added Sequential Thinking MCP integration for complex issues
- Triggers on 2+ rejections or 3+ critical issues
- New escalation format with root cause analysis
- Comprehensive solution strategies with trade-off evaluation
- Educational feedback to break rejection cycles
- Files: .claude/agents/code-review.md (+308 lines)
- Docs: CODE_REVIEW_ST_ENHANCEMENT.md, CODE_REVIEW_ST_TESTING.md

Frontend Design Skill Enhancement:
- Automatic invocation for ANY UI change
- Comprehensive validation checklist (200+ checkpoints)
- 8 validation categories (visual, interactive, responsive, a11y, etc.)
- 3 validation levels (quick, standard, comprehensive)
- Integration with code review workflow
- Files: .claude/skills/frontend-design/SKILL.md (+120 lines)
- Docs: UI_VALIDATION_CHECKLIST.md (462 lines), AUTOMATIC_VALIDATION_ENHANCEMENT.md (587 lines)

Settings Optimization:
- Repaired .claude/settings.local.json (fixed m365 pattern)
- Reduced permissions from 49 to 33 (33% reduction)
- Removed duplicates, sorted alphabetically
- Created SETTINGS_PERMISSIONS.md documentation

Checkpoint Command Enhancement:
- Dual checkpoint system (git + database)
- Saves session context to API for cross-machine recall
- Includes git metadata in database context
- Files: .claude/commands/checkpoint.md (+139 lines)

Decision Rationale:
- Sequential Thinking MCP breaks rejection cycles by identifying root causes
- Automatic frontend validation catches UI issues before code review
- Dual checkpoints enable complete project memory across machines
- Settings optimization improves maintainability

Total: 1,200+ lines of documentation and enhancements

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

projects/msp-tools/guru-rmm/agent-ab9b351.jsonl

@@ -0,0 +1,7 @@
+{"parentUuid":null,"isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","type":"user","message":{"role":"user","content":"Warmup"},"uuid":"c6fdaeea-bb45-4911-a138-0cbdf9b30945","timestamp":"2026-01-08T20:34:33.656Z"}
+{"parentUuid":"c6fdaeea-bb45-4911-a138-0cbdf9b30945","isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","message":{"model":"claude-opus-4-5-20251101","id":"msg_01XFrocVHpHm9SDhSDAvAAF5","type":"message","role":"assistant","content":[{"type":"text","text":"I understand you want me to warm up and be ready to help. I'm ready to assist you with exploring and planning for the guru-rmm codebase. \n\nLet me quickly familiarize myself with the project structure."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":12193,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":12193,"ephemeral_1h_input_tokens":0},"output_tokens":2,"service_tier":"standard"}},"requestId":"req_011CWvYs6M4PSKkUtR2Hzh83","type":"assistant","uuid":"7055d5a3-deff-46de-a5ec-a267b75800af","timestamp":"2026-01-08T20:34:40.737Z"}
+{"parentUuid":"7055d5a3-deff-46de-a5ec-a267b75800af","isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","message":{"model":"claude-opus-4-5-20251101","id":"msg_01XFrocVHpHm9SDhSDAvAAF5","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01MRAG2n4Qe2rnSYMfZ2DduQ","name":"Bash","input":{"command":"ls -la \"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm\"","description":"List project root directory contents"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":12193,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":12193,"ephemeral_1h_input_tokens":0},"output_tokens":2,"service_tier":"standard"}},"requestId":"req_011CWvYs6M4PSKkUtR2Hzh83","type":"assistant","uuid":"e50072dd-2263-4479-8859-26e145e1bb38","timestamp":"2026-01-08T20:34:41.626Z"}
+{"parentUuid":"e50072dd-2263-4479-8859-26e145e1bb38","isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","message":{"model":"claude-opus-4-5-20251101","id":"msg_01XFrocVHpHm9SDhSDAvAAF5","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_012mWKM9HqQzGppknHwLXood","name":"Glob","input":{"pattern":"**/*.md","path":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":12193,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":12193,"ephemeral_1h_input_tokens":0},"output_tokens":227,"service_tier":"standard"}},"requestId":"req_011CWvYs6M4PSKkUtR2Hzh83","type":"assistant","uuid":"e08c22f1-3fd0-450c-bb82-29cbaed2a8b2","timestamp":"2026-01-08T20:34:42.174Z"}
+{"parentUuid":"e08c22f1-3fd0-450c-bb82-29cbaed2a8b2","isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"Warmup","is_error":true,"tool_use_id":"toolu_012mWKM9HqQzGppknHwLXood"}]},"uuid":"b7b7fa08-2a3d-492d-abe7-657f5e828629","timestamp":"2026-01-08T20:34:43.087Z","toolUseResult":"Error: Warmup","sourceToolAssistantUUID":"e08c22f1-3fd0-450c-bb82-29cbaed2a8b2"}
+{"parentUuid":"e50072dd-2263-4479-8859-26e145e1bb38","isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"Warmup","is_error":true,"tool_use_id":"toolu_01MRAG2n4Qe2rnSYMfZ2DduQ"}]},"uuid":"7d40dbe7-b869-4231-8588-c1803b5e6f41","timestamp":"2026-01-08T20:34:43.178Z","toolUseResult":"Error: Warmup","sourceToolAssistantUUID":"e50072dd-2263-4479-8859-26e145e1bb38"}
+{"parentUuid":"7d40dbe7-b869-4231-8588-c1803b5e6f41","isSidechain":true,"userType":"external","cwd":"C:\\Users\\MikeSwanson\\claude-projects\\gururmm\\guru-rmm","sessionId":"51c76fee-90cf-42ed-a71d-53ebb1c548b8","version":"2.1.1","gitBranch":"master","agentId":"ab9b351","message":{"model":"claude-opus-4-5-20251101","id":"msg_01DXv4xiPWwGSwGgTtsNzoLW","type":"message","role":"assistant","content":[{"type":"text","text":"I'm warmed up and ready to help you explore the guru-rmm codebase and design implementation plans. What would you like me to look into?"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":34,"cache_creation_input_tokens":298,"cache_read_input_tokens":12193,"cache_creation":{"ephemeral_5m_input_tokens":298,"ephemeral_1h_input_tokens":0},"output_tokens":36,"service_tier":"standard"}},"requestId":"req_011CWvYtBH18yUmepwocGLJW","type":"assistant","uuid":"c62ac1b1-1de1-4d9c-9d02-d832f3647df6","timestamp":"2026-01-08T20:34:54.520Z"}