docs: overhaul documentation for fork readiness

- Rewrite README from scratch: accurate stack versions, correct setup
  sequence, verified feature list, full API reference, architecture
  overview, and security model — all sourced directly from the codebase
- Remove internal/stale docs: COLOR_SCHEME_MODERNIZATION.md, plan.md,
  frontend/README.md (CRA boilerplate)
- Clean up DESIGN_SYSTEM.md: remove emoji headers and version footer
- Fix WEEKLY_REPORT_FEATURE.md: replace hardcoded absolute paths with
  relative paths
- Clean up test_cases_auth.md: remove stale branch and date references

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

DESIGN_SYSTEM.md

@@ -1,6 +1,6 @@
 # CVE Intelligence Dashboard - Design System Reference
 
-## 🎨 Color Palette
+## Color Palette
 
 ### Primary Colors
 ```css
@@ -33,7 +33,7 @@
 | **Medium** | `#0EA5E9` | `rgba(14, 165, 233, 0.25)` | `#7DD3FC` | `#0EA5E9` |
 | **Low** | `#10B981` | `rgba(16, 185, 129, 0.25)` | `#6EE7B7` | `#10B981` |
 
-## 📐 Layout Structure
+## Layout Structure
 
 ### Three-Column Grid Layout
 ```
@@ -60,7 +60,7 @@
 - **Desktop (lg+)**: 3-column layout (3-6-3 grid)
 - **Tablet/Mobile**: Stacked single column
 
-## 🎯 Component Specifications
+## Component Specifications
 
 ### Stat Cards
 ```css
@@ -117,7 +117,7 @@ Letter Spacing: 0.5px
 Glow Dot: 8px circle with pulse animation
 ```
 
-## ✨ Interactions & Animations
+## Interactions & Animations
 
 ### Hover Effects
 - **Cards**: `translateY(-2px)`, enhanced border, subtle glow
@@ -151,7 +151,7 @@ Fast: all 0.2s ease
 Ripple: width/height 0.5s
 ```
 
-## 🔤 Typography
+## Typography
 
 ### Font Families
 ```css
@@ -178,7 +178,7 @@ Accent Headings: 0 0 16px rgba(14, 165, 233, 0.3), 0 0 32px rgba(14, 165, 233, 0
 Badge Text: 0 0 8px rgba([color], 0.5)
 ```
 
-## 🎨 Visual Effects
+## Visual Effects
 
 ### Shadows
 ```css
@@ -223,7 +223,7 @@ linear-gradient(rgba(14, 165, 233, 0.025) 1px, transparent 1px)
 Size: 20px × 20px
 ```
 
-## 🧩 Specific Component Patterns
+## Specific Component Patterns
 
 ### Wiki/Knowledge Base Entry
 ```css
@@ -261,7 +261,7 @@ Chevron: Rotate -90deg (collapsed) to 0deg (expanded)
 Vendor Cards: Nested with reduced opacity borders
 ```
 
-## 📱 Accessibility
+## Accessibility
 
 ### Contrast Ratios
 - Primary text on dark: 18.5:1 (AAA)
@@ -278,7 +278,7 @@ Vendor Cards: Nested with reduced opacity borders
 - Line height: 1.5 for body text
 - Letter spacing: Generous for uppercase labels
 
-## 🎯 Design Principles
+## Design Principles
 
 1. **Professional Sophistication**: Modern enterprise feel, not arcade
 2. **Tactical Intelligence**: Purpose-driven, information-dense
@@ -288,7 +288,3 @@ Vendor Cards: Nested with reduced opacity borders
 6. **Monospace Data**: Technical data uses JetBrains Mono for clarity
 7. **Generous Spacing**: Breathing room prevents overwhelming density
 
----
-
-**Last Updated**: February 10, 2026
-**Version**: 2.0 (Modern Professional Redesign)