Add complete Kobo highlight sync system with NickelMenu integration

- Add text cleaning to remove page reference numbers (e.g., "10After" -> "After")
- Implement cleanHighlightText() function with boundary detection
- Add NickelMenu configuration for UI integration
- Create sync wrapper scripts (with and without FBInk notifications)
- Add installation guides for Kobo deployment
- Include pointer/slice explanation examples for learning

Features:
- Extracts highlights from Kobo SQLite database
- Cleans page references from academic texts
- Computes SHA-256 hashes for deduplication
- POSTs JSON to Flask API endpoint
- Supports ARM static linking for Kobo hardware
- Optional FBInk notifications for user feedback

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

FBINK_GUIDE.md

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+# FBInk Integration Guide
+
+## What is FBInk?
+
+FBInk is a tool for drawing text and images on e-ink displays. It's commonly bundled with KOReader and other Kobo mods.
+
+## Check if FBInk is installed
+
+```bash
+ssh root@192.168.88.110
+which fbink
+# or
+fbink --version
+```
+
+If not installed, it usually comes with KOReader at `/usr/local/koreader/fbink`
+
+## Basic Usage in Scripts
+
+### Show a message
+```bash
+fbink -pm "Hello, World!"
+```
+
+### Show message at specific position
+```bash
+fbink -pm -y 10 "Message at row 10"
+```
+
+### Clear the screen
+```bash
+fbink -s
+```
+
+### Show without refresh (faster)
+```bash
+fbink -q -pm "Quick message"
+```
+
+## Common Options
+
+- `-pm` - Print centered (middle)
+- `-q` - Quiet mode (no verbose output)
+- `-y N` - Print at row N
+- `-s` - Clear screen
+- `-h` - Refresh (full screen)
+- `-f` - Flash (for animations)
+
+## Testing FBInk
+
+SSH into your Kobo and try:
+```bash
+fbink -pm "Testing FBInk!"
+sleep 2
+fbink -s  # Clear it
+```
+
+## Enhanced sync_highlights.sh
+
+The `sync_highlights_with_fbink.sh` script shows:
+- "Syncing highlights..." while running
+- "✓ Synced N highlights!" on success
+- "✗ Sync failed! Check log" on error
+
+Auto-clears after 2-3 seconds so it doesn't clutter the screen.
+
+## Installation
+
+Replace your existing sync script:
+```bash
+scp sync_highlights_with_fbink.sh root@192.168.88.110:/usr/local/bin/sync_highlights.sh
+ssh root@192.168.88.110 chmod +x /usr/local/bin/sync_highlights.sh
+```
+
+## Custom Messages
+
+You can customize the messages in the script:
+
+```bash
+# Change this line:
+$FBINK -q -pm -y 10 "✓ Synced $COUNT highlights!"
+
+# To something like:
+$FBINK -q -pm -y 10 "📚 $COUNT new highlights saved!"
+```
+
+## Advanced: Progress Bar
+
+For future enhancements, FBInk can show progress bars:
+```bash
+fbink -pm -P 50  # Show 50% progress
+```
+
+Could be useful if syncing takes a while!
+
+## Fallback Behavior
+
+The script automatically detects if FBInk is available. If not found, it runs silently (just logs to file). So it works either way!