feat(viz-platform): complete Sprint 1 - plugin structure and tests

Sprint 1 - viz-platform Plugin completed (13/13 issues):
- Commands: 7 files (initial-setup, chart, dashboard, theme, theme-new, theme-css, component)
- Agents: 3 files (theme-setup, layout-builder, component-check)
- Documentation: README.md, claude-md-integration.md
- Tests: 94 tests passing (68-99% coverage)
- CHANGELOG updated with completion status

Closes: #178, #179, #180, #181, #182

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

CHANGELOG.md

@@ -8,7 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Added
 
-#### Sprint 1: viz-platform Plugin (Planned)
+#### Sprint 1: viz-platform Plugin ✅ Completed
 - **viz-platform** v1.0.0 - Visualization tools with Dash Mantine Components validation and theming
   - **DMC Tools** (3 tools): `list_components`, `get_component_props`, `validate_component`
     - Version-locked component registry prevents Claude from hallucinating invalid props
@@ -22,14 +22,21 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
     - Dual storage: user-level (`~/.config/claude/themes/`) and project-level
   - **Page Tools** (3 tools): `page_create`, `page_add_navbar`, `page_set_auth`
     - Multi-page Dash app structure generation
-  - **Commands**: `/chart`, `/dashboard`, `/theme`, `/theme new`, `/theme css`, `/component`, `/initial-setup`
+  - **Commands**: `/chart`, `/dashboard`, `/theme`, `/theme-new`, `/theme-css`, `/component`, `/initial-setup`
   - **Agents**: `theme-setup`, `layout-builder`, `component-check`
   - **SessionStart Hook**: DMC version check (non-blocking)
+  - **Tests**: 94 tests passing
+    - config.py: 82% coverage
+    - component_registry.py: 92% coverage
+    - dmc_tools.py: 88% coverage
+    - chart_tools.py: 68% coverage
+    - theme_tools.py: 99% coverage
 
-**Sprint Planning:**
-- Milestone: Sprint 1 - viz-platform Plugin
-- Issues: #170-#182 (13 issues)
+**Sprint Completed:**
+- Milestone: Sprint 1 - viz-platform Plugin (closed 2026-01-26)
+- Issues: #170-#182 (13/13 closed)
 - Wiki: [Sprint-1-viz-platform-Implementation-Plan](https://gitea.hotserv.cloud/personal-projects/leo-claude-mktplace/wiki/Sprint-1-viz-platform-Implementation-Plan)
+- Lessons: [sprint-1---viz-platform-plugin-implementation](https://gitea.hotserv.cloud/personal-projects/leo-claude-mktplace/wiki/lessons/sprints/sprint-1---viz-platform-plugin-implementation)
 - Reference: `docs/changes/CHANGE_V04_0_0_PROPOSAL_ORIGINAL.md` (Phases 4-5)
 
 ---