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>

sync_highlights.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# Sync Kobo highlights to home server
+# Place at: /usr/local/bin/sync_highlights.sh
+
+DB="/mnt/onboard/.kobo/KoboReader.sqlite"
+ENDPOINT="http://192.168.88.69:42070/api/highlights"
+LOGFILE="/mnt/onboard/.adds/kb_exfiltrator.log"
+
+# Create log directory if needed
+mkdir -p /mnt/onboard/.adds
+
+# Log with timestamp
+echo "=== $(date) ===" >> "$LOGFILE"
+
+# Run exfiltrator and capture output
+if /usr/local/bin/kb_exfiltrator "$DB" "$ENDPOINT" >> "$LOGFILE" 2>&1; then
+    # Success
+    echo "Success: Highlights synced!" >> "$LOGFILE"
+    # Optional: Show a notification (requires FBInk or similar)
+    # fbink -g file=success.png
+    exit 0
+else
+    # Failure
+    echo "Error: Sync failed. Check log at .adds/kb_exfiltrator.log" >> "$LOGFILE"
+    exit 1
+fi