Implement Tefter per SPEC.md: NV-style notes with server, sync, PWA, desktop

- frontend/: Svelte 4 + TS + Vite app — omnibar (search-and-create), ranked
  diacritic-insensitive filtering, CodeMirror 6 markdown editor with 400ms
  autosave, marked+DOMPurify preview with [[wiki-links]], tag filter, undo
  toast, light/dark, narrow-screen stacked layout, IndexedDB store, pull-then-
  push sync engine with conflict handling, versioned cache-first service
  worker + manifest (installable PWA)
- server/: tefterd — Go stdlib HTTP + modernc.org/sqlite, /api/v1 sync API
  (changes/batch/health/import), SHA-256 hashed bearer token, LWW-with-
  conflict-copies push rules, subcommands: init, token rotate, import
  simplenote, compact, backup (VACUUM INTO); embeds the frontend bundle
- desktop/: Wails v2 shell — single instance, hide-to-tray (fyne systray),
  global Ctrl+Shift+Space hotkey, quit-on-close flag
- Simplenote import (CLI + web upload), idempotent via source_id dedupe;
  verified against a real 242-note export
- Makefile (frontend/server/server-all/desktop/test), GitHub release workflow,
  README with systemd/Caddy/backup docs

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "tefter-frontend",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "check": "svelte-check --tsconfig ./tsconfig.json"
+  },
+  "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "^3.1.2",
+    "@types/node": "^26.1.1",
+    "svelte": "^4.2.19",
+    "svelte-check": "^3.8.6",
+    "tslib": "^2.8.1",
+    "typescript": "^5.6.3",
+    "vite": "^5.4.11"
+  },
+  "dependencies": {
+    "@codemirror/commands": "^6.7.1",
+    "@codemirror/lang-markdown": "^6.3.1",
+    "@codemirror/language": "^6.10.6",
+    "@codemirror/state": "^6.5.0",
+    "@codemirror/view": "^6.35.3",
+    "@lezer/highlight": "^1.2.1",
+    "dompurify": "^3.2.3",
+    "marked": "^15.0.4"
+  }
+}