ui: dramatically improve DocumentReviewPage inspector UI

- Gradient header with radial glow and icon-labeled badges
- Glass morphism cards with consistent 24px border radius
- Section headers with descriptive icons (Shield, Layers, Activity, etc.)
- Quality score progress bar visualization
- Better table styling with hover states and alternating rows
- Chart containers with dark glass backgrounds and styled tooltips
- Action buttons grouped horizontally with border-radius: full
- Improved correction form with FormControl labels and 2-column layout
- Forensic anomaly cards with hover transitions
- Knowledge graph legend with glow effects on color dots
- Better empty states with centered icons
- Improved PDF viewer toolbar with badge page indicator
- Integrity check panels with decorative glow effects
- All functionality preserved - zero logic changes

Author: Anandb71