Initial commit: Ultimate Notetaking, Sync & Backup System

A NixOS-based system for managing personal data across three tiers:
- Tier 1: Configuration (shareable via git)
- Tier 2: Syncable data (nb + Syncthing)
- Tier 3: Large data (self-hosted services + backup)

Includes:
- NixOS modules for nb, Syncthing, backup (restic)
- Server modules for Forgejo, Immich, Jellyfin
- Helper scripts (usync, ustatus)
- Comprehensive documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/usync

@@ -0,0 +1,156 @@
+#!/usr/bin/env bash
+#
+# usync - Unified sync command for the Ultimate Notetaking System
+#
+# Syncs both nb notebooks and triggers Syncthing scans.
+#
+# Usage:
+#   usync          - Sync everything
+#   usync nb       - Sync only nb notebooks
+#   usync st       - Sync only Syncthing folders
+#   usync status   - Show sync status
+
+set -euo pipefail
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+log_info() {
+    echo -e "${BLUE}[INFO]${NC} $1"
+}
+
+log_success() {
+    echo -e "${GREEN}[OK]${NC} $1"
+}
+
+log_warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+sync_nb() {
+    log_info "Syncing nb notebooks..."
+
+    if ! command -v nb &> /dev/null; then
+        log_error "nb not found in PATH"
+        return 1
+    fi
+
+    # Get list of notebooks
+    notebooks=$(nb notebooks --names 2>/dev/null || echo "")
+
+    if [ -z "$notebooks" ]; then
+        log_warn "No nb notebooks found"
+        return 0
+    fi
+
+    # Sync each notebook
+    for notebook in $notebooks; do
+        log_info "  Syncing notebook: $notebook"
+        if nb "$notebook:sync" 2>/dev/null; then
+            log_success "  $notebook synced"
+        else
+            log_warn "  $notebook sync failed (no remote?)"
+        fi
+    done
+}
+
+sync_syncthing() {
+    log_info "Triggering Syncthing scan..."
+
+    if ! command -v syncthing &> /dev/null; then
+        log_error "syncthing not found in PATH"
+        return 1
+    fi
+
+    # Check if Syncthing is running
+    if ! syncthing cli show system &> /dev/null; then
+        log_warn "Syncthing is not running"
+        return 1
+    fi
+
+    # Trigger scan on all folders
+    if syncthing cli scan --all 2>/dev/null; then
+        log_success "Syncthing scan triggered"
+    else
+        log_error "Failed to trigger Syncthing scan"
+        return 1
+    fi
+}
+
+show_status() {
+    echo "=== Sync Status ==="
+    echo ""
+
+    # nb status
+    echo "--- nb Notebooks ---"
+    if command -v nb &> /dev/null; then
+        nb notebooks 2>/dev/null || echo "  No notebooks"
+        echo ""
+        echo "Last sync times:"
+        for notebook in $(nb notebooks --names 2>/dev/null); do
+            nb_dir="${NB_DIR:-$HOME/.nb}"
+            if [ -d "$nb_dir/$notebook/.git" ]; then
+                last_commit=$(git -C "$nb_dir/$notebook" log -1 --format="%ar" 2>/dev/null || echo "never")
+                echo "  $notebook: $last_commit"
+            fi
+        done
+    else
+        echo "  nb not installed"
+    fi
+
+    echo ""
+
+    # Syncthing status
+    echo "--- Syncthing ---"
+    if command -v syncthing &> /dev/null && syncthing cli show system &> /dev/null; then
+        syncthing cli show system 2>/dev/null | grep -E "(myID|startTime)" || true
+        echo ""
+        echo "Folders:"
+        syncthing cli show config 2>/dev/null | jq -r '.folders[] | "  \(.label // .id): \(.path)"' 2>/dev/null || echo "  Unable to get folder info"
+    else
+        echo "  Syncthing not running"
+    fi
+}
+
+# Main
+case "${1:-all}" in
+    nb)
+        sync_nb
+        ;;
+    st|syncthing)
+        sync_syncthing
+        ;;
+    status)
+        show_status
+        ;;
+    all|"")
+        sync_nb
+        echo ""
+        sync_syncthing
+        echo ""
+        log_success "All sync operations complete"
+        ;;
+    -h|--help|help)
+        echo "usync - Unified sync command"
+        echo ""
+        echo "Usage:"
+        echo "  usync          Sync everything (nb + Syncthing)"
+        echo "  usync nb       Sync only nb notebooks"
+        echo "  usync st       Trigger Syncthing scan"
+        echo "  usync status   Show sync status"
+        echo "  usync help     Show this help"
+        ;;
+    *)
+        log_error "Unknown command: $1"
+        echo "Run 'usync help' for usage"
+        exit 1
+        ;;
+esac