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_with_fbink.sh

@@ -0,0 +1,74 @@
+#!/bin/sh
+# Sync Kobo highlights to home server with FBInk notifications
+# 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
+
+# Check if FBInk is available
+FBINK=""
+if command -v fbink >/dev/null 2>&1; then
+    FBINK="fbink"
+elif [ -x /usr/local/bin/fbink ]; then
+    FBINK="/usr/local/bin/fbink"
+elif [ -x /usr/bin/fbink ]; then
+    FBINK="/usr/bin/fbink"
+fi
+
+# Show "Syncing..." message
+if [ -n "$FBINK" ]; then
+    $FBINK -q -pm -y 10 "Syncing highlights..."
+fi
+
+# Log with timestamp
+echo "=== $(date) ===" >> "$LOGFILE"
+
+# Run exfiltrator and capture output
+OUTPUT=$(/usr/local/bin/kb_exfiltrator "$DB" "$ENDPOINT" 2>&1)
+EXIT_CODE=$?
+
+# Log the output
+echo "$OUTPUT" >> "$LOGFILE"
+
+# Parse the output for stats (if successful)
+if [ $EXIT_CODE -eq 0 ]; then
+    # Try to extract highlight count from output
+    COUNT=$(echo "$OUTPUT" | grep -o 'Extracted [0-9]* highlights' | grep -o '[0-9]*')
+
+    if [ -n "$FBINK" ]; then
+        if [ -n "$COUNT" ]; then
+            $FBINK -q -pm -y 10 "✓ Synced $COUNT highlights!"
+        else
+            $FBINK -q -pm -y 10 "✓ Highlights synced!"
+        fi
+    fi
+
+    echo "Success: Highlights synced!" >> "$LOGFILE"
+
+    # Clear notification after 2 seconds
+    sleep 2
+    if [ -n "$FBINK" ]; then
+        $FBINK -q -s
+    fi
+
+    exit 0
+else
+    # Failure
+    if [ -n "$FBINK" ]; then
+        $FBINK -q -pm -y 10 "✗ Sync failed! Check log"
+    fi
+
+    echo "Error: Sync failed" >> "$LOGFILE"
+
+    # Clear notification after 3 seconds
+    sleep 3
+    if [ -n "$FBINK" ]; then
+        $FBINK -q -s
+    fi
+
+    exit 1
+fi