docs: fix documentation drift (19 items)

Critical fixes:
- Fix projman version mismatch (3.1.0 -> 3.2.0 in plugin.json)
- Update CLAUDE.md version to 4.1.0

Stale documentation updates:
- Add viz-platform to README.md (plugins, MCP servers, verification table)
- Add viz-platform to COMMANDS-CHEATSHEET.md (8 commands, hooks, MCP table)
- Add viz-platform and data-platform to CANONICAL-PATHS.md
- Add viz-platform and data-platform to CONFIGURATION.md
- Fix CHANGELOG.md tool counts (Layout 5, Theme 6, Page 5)
- Add data-platform to CLAUDE.md repository structure

Missing documentation:
- Create mcp-servers/viz-platform/README.md (21 tools documented)
- Add viz-platform SessionStart hook to COMMANDS-CHEATSHEET.md

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

mcp-servers/viz-platform/README.md

@@ -0,0 +1,115 @@
+# viz-platform MCP Server
+
+Model Context Protocol (MCP) server for Dash Mantine Components validation and visualization tools.
+
+## Overview
+
+This MCP server provides 21 tools for:
+- **DMC Validation**: Version-locked component registry prevents Claude from hallucinating invalid props
+- **Chart Creation**: Plotly-based visualization with theme integration
+- **Layout Composition**: Dashboard layouts with responsive grids
+- **Theme Management**: Design token-based theming system
+- **Page Structure**: Multi-page Dash app generation
+
+## Tools
+
+### DMC Tools (3)
+
+| Tool | Description |
+|------|-------------|
+| `list_components` | List available DMC components by category |
+| `get_component_props` | Get valid props, types, and defaults for a component |
+| `validate_component` | Validate component definition before use |
+
+### Chart Tools (2)
+
+| Tool | Description |
+|------|-------------|
+| `chart_create` | Create Plotly chart (line, bar, scatter, pie, histogram, area, heatmap) |
+| `chart_configure_interaction` | Configure chart interactions (zoom, pan, hover) |
+
+### Layout Tools (5)
+
+| Tool | Description |
+|------|-------------|
+| `layout_create` | Create dashboard layout structure |
+| `layout_add_filter` | Add filter components to layout |
+| `layout_set_grid` | Configure responsive grid settings |
+| `layout_get` | Retrieve layout configuration |
+| `layout_add_section` | Add sections to layout |
+
+### Theme Tools (6)
+
+| Tool | Description |
+|------|-------------|
+| `theme_create` | Create new theme with design tokens |
+| `theme_extend` | Extend existing theme with overrides |
+| `theme_validate` | Validate theme completeness |
+| `theme_export_css` | Export theme as CSS custom properties |
+| `theme_list` | List available themes |
+| `theme_activate` | Set active theme for visualizations |
+
+### Page Tools (5)
+
+| Tool | Description |
+|------|-------------|
+| `page_create` | Create new page structure |
+| `page_add_navbar` | Add navigation bar to page |
+| `page_set_auth` | Configure page authentication |
+| `page_list` | List available pages |
+| `page_get_app_config` | Get full app configuration |
+
+## Configuration
+
+### Environment Variables
+
+| Variable | Required | Description |
+|----------|----------|-------------|
+| `DMC_VERSION` | No | Dash Mantine Components version (auto-detected if installed) |
+| `VIZ_DEFAULT_THEME` | No | Default theme name |
+| `CLAUDE_PROJECT_DIR` | No | Project directory for theme storage |
+
+### Theme Storage
+
+Themes can be stored at two levels:
+- **User-level**: `~/.config/claude/themes/`
+- **Project-level**: `{project}/.viz-platform/themes/`
+
+Project-level themes take precedence.
+
+## Component Registry
+
+The server uses a static JSON registry for DMC component validation:
+- Pre-generated from DMC source code
+- Version-tagged (e.g., `dmc_2_5.json`)
+- Prevents hallucination of non-existent props
+- Fast, deterministic validation
+
+Registry files are stored in `registry/` directory.
+
+## Tests
+
+94 tests with coverage:
+- `test_config.py`: 82% coverage
+- `test_component_registry.py`: 92% coverage
+- `test_dmc_tools.py`: 88% coverage
+- `test_chart_tools.py`: 68% coverage
+- `test_theme_tools.py`: 99% coverage
+
+Run tests:
+```bash
+cd mcp-servers/viz-platform
+source .venv/bin/activate
+pytest tests/ -v
+```
+
+## Dependencies
+
+- Python 3.10+
+- FastMCP
+- plotly
+- dash-mantine-components (optional, for version detection)
+
+## Usage
+
+This MCP server is used by the `viz-platform` plugin. See [plugins/viz-platform/README.md](../../plugins/viz-platform/README.md) for usage instructions.