docs(9): Add Phase 9 summary and update STATE.md

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

.planning/STATE.md

@@ -2,7 +2,7 @@
 
 ## Current Status
 - **Milestone**: 1 - Infrastructure Fixes, Private URLs & UI Polish
-- **Current Phase**: 9 - FileManager Disk Usage UI
+- **Current Phase**: 10 - Integration Testing
 - **Phase Status**: Pending
 - **Last Updated**: 2026-01-19
 
@@ -18,9 +18,20 @@
 | 6 | completed | 2026-01-19 | 2026-01-19 |
 | 7 | completed | 2026-01-19 | 2026-01-19 |
 | 8 | completed | 2026-01-19 | 2026-01-19 |
-| 9 | pending | - | - |
+| 9 | completed | 2026-01-19 | 2026-01-19 |
 | 10 | pending | - | - |
 
+## Phase 9 Summary
+FileManager disk usage UI fully implemented:
+- Backend: analyze_directory_sizes, get_file_type_breakdown, get_all_disk_mounts
+- Multi-mount disk usage widget with color-coded progress bars
+- Directory analysis panel with horizontal bar charts
+- File type breakdown with Recharts PieChart
+- Largest files list with navigation
+- Collapsible sidebar with localStorage persistence
+- Lucide icons replacing all emoji file icons
+- Responsive layout with mobile sidebar slide-in
+
 ## Phase 8 Summary
 Applications UI polish fully implemented:
 - Lucide icons replacing all inline SVGs
@@ -85,9 +96,10 @@ Completed all 8 tasks:
 None currently identified.
 
 ## Notes
-- Phase 8 complete - applications page polished with full feature set
-- Both Templates and Applications pages now have consistent UX
-- Ready for Phase 9 (FileManager Disk Usage UI) or Phase 10 (Integration Testing)
+- Phase 9 complete - FileManager now has comprehensive disk visualization
+- All UI pages polished: Dashboard, Templates, Applications, FileManager
+- Ready for Phase 10 (Integration Testing)
+- Milestone 1 nearly complete - only testing phase remains
 
 ## Quick Links
 - [ROADMAP.md](./ROADMAP.md)
@@ -97,3 +109,4 @@ None currently identified.
 - [Phase 6 Summary](./phases/06-dashboard-historical-metrics/SUMMARY.md)
 - [Phase 7 Summary](./phases/07-templates-page-polish/SUMMARY.md)
 - [Phase 8 Summary](./phases/08-applications-ui-polish/SUMMARY.md)
+- [Phase 9 Summary](./phases/09-filemanager-disk-usage/SUMMARY.md)

.planning/phases/09-filemanager-disk-usage/SUMMARY.md

@@ -0,0 +1,82 @@
+# Phase 9: FileManager Disk Usage UI - Summary
+
+## Overview
+Comprehensive enhancement of the FileManager page with disk usage visualization, directory analysis, file type breakdown charts, and improved layout with collapsible sidebar.
+
+## Completed
+- [x] Task 1: Add Backend Directory Size Analysis Endpoint
+- [x] Task 2: Add Multi-Mount Disk Usage Widget
+- [x] Task 3: Create Directory Analysis Panel
+- [x] Task 4: Add Storage Type Breakdown
+- [x] Task 5: Add Largest Files List
+- [x] Task 6: Reorganize Layout with Collapsible Sidebar
+- [x] Task 7: Add Lucide Icons Throughout
+- [x] Task 8: Polish and Responsive Adjustments
+
+## Implementation Details
+
+### Backend Enhancements
+- **`get_all_disk_mounts()`**: Uses `psutil.disk_partitions()` to list all mount points with usage stats
+- **`analyze_directory_sizes(path, depth, limit)`**: Recursively calculates subdirectory sizes with depth limit
+- **`get_file_type_breakdown(path, max_depth)`**: Categorizes files into 8 types (images, videos, audio, documents, code, archives, data, other)
+- New API endpoints: `/files/disk-mounts`, `/files/analyze`, `/files/type-breakdown`
+
+### Multi-Mount Disk Widget
+- Shows all mount points with device, mountpoint, and usage
+- Color-coded progress bars: green (<70%), yellow (70-90%), red (>=90%)
+- Collapsible section with state persisted in localStorage
+- Refresh button with last updated timestamp
+
+### Directory Analysis Panel
+- "Analyze" button in toolbar triggers analysis
+- Dual-view toggle: Directories vs Files
+- Horizontal bar charts showing relative sizes
+- Click directory bar to navigate into it
+- Click file to select in file list
+
+### File Type Breakdown
+- Recharts PieChart with donut style
+- 8 file categories with distinct colors
+- Legend showing category name and size
+- Displayed when analysis is active
+
+### Largest Files List
+- Top 10 largest files in current directory
+- Shows filename and size
+- Click to select file in main list
+
+### Sidebar Layout
+- Right sidebar with 320px width
+- Toggle button in toolbar
+- Contains: Disk Usage, Directory Analysis, File Types
+- Mobile: slides in from right as overlay
+- State persisted in localStorage
+
+### Lucide Icons
+- Replaced all emoji-based file icons with Lucide components
+- Icon types: Folder, File, FileCode, FileImage, FileVideo, FileAudio, FileArchive, Database, Terminal, FileText
+- Color-coded by file type
+- All toolbar buttons now use Lucide icons
+
+### Responsive Design
+- Sidebar becomes slide-in panel on <1024px
+- File list columns hide progressively on smaller screens
+- Touch-friendly tap targets
+- Smooth transitions
+
+## Files Changed
+- `backend/app/services/file_service.py` - Added analysis methods
+- `backend/app/api/files.py` - Added analysis endpoints
+- `frontend/src/services/api.js` - Added API methods
+- `frontend/src/pages/FileManager.jsx` - Complete rewrite with sidebar and analysis
+- `frontend/src/styles/pages/_file-manager.less` - Extended with new styles
+
+## Commits
+- `4c7f551` - feat(9): Add backend directory analysis and disk mount endpoints
+- `135f053` - feat(9): Add FileManager disk usage visualization and analysis
+
+## Notes
+- Directory analysis has depth limits to prevent performance issues on large directories
+- File type breakdown walks up to 3 levels deep by default
+- PieChart uses Recharts library already present in project
+- Sidebar state persisted separately from disk collapsed state