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>

.github/workflows/release.yml

@@ -0,0 +1,113 @@
+name: release
+
+on:
+  push:
+    tags: ['v*']
+  workflow_dispatch:
+
+env:
+  NODE_VERSION: '22'
+  GO_VERSION: 'stable'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: '22' }
+      - uses: actions/setup-go@v5
+        with: { go-version: 'stable' }
+      - name: Build frontend
+        run: make frontend && rm -rf server/webdist/dist && cp -r frontend/dist server/webdist/dist
+      - name: Go tests
+        run: cd server && go vet ./... && go test ./...
+
+  server:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: '22' }
+      - uses: actions/setup-go@v5
+        with: { go-version: 'stable' }
+      - name: Build tefterd for all platforms
+        run: make server-all VERSION=${{ github.ref_name }}
+      - uses: actions/upload-artifact@v4
+        with:
+          name: tefterd
+          path: build/tefterd-*
+
+  desktop:
+    needs: test
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            artifact: tefter-desktop-linux
+          - os: macos-latest
+            artifact: tefter-desktop-macos
+          - os: windows-latest
+            artifact: tefter-desktop-windows
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: '22' }
+      - uses: actions/setup-go@v5
+        with: { go-version: 'stable' }
+      - name: Linux deps
+        if: runner.os == 'Linux'
+        run: sudo apt-get update && sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev libx11-dev
+      - name: Install Wails
+        run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
+      - name: Build frontend
+        run: make frontend VERSION=${{ github.ref_name }}
+      - name: Copy bundle into desktop
+        shell: bash
+        run: |
+          rm -rf desktop/frontend/dist
+          mkdir -p desktop/frontend
+          cp -r frontend/dist desktop/frontend/dist
+      - name: Wails build (Linux)
+        if: runner.os == 'Linux'
+        run: cd desktop && wails build -tags webkit2_41 -ldflags "-X main.Version=${{ github.ref_name }}"
+      - name: Wails build (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          cd desktop && wails build -ldflags "-X main.Version=${{ github.ref_name }}"
+          cd build/bin && zip -r Tefter.app.zip Tefter.app
+      - name: Wails build (Windows)
+        if: runner.os == 'Windows'
+        run: cd desktop && wails build -ldflags "-X main.Version=${{ github.ref_name }}"
+      - name: Package Linux artifact (.desktop file included)
+        if: runner.os == 'Linux'
+        run: |
+          mkdir -p pkg
+          cp desktop/build/bin/tefter-desktop pkg/
+          cp desktop/tefter.desktop pkg/
+          cp frontend/public/icon-512.png pkg/tefter.png
+          tar -C pkg -czf tefter-desktop-linux-amd64.tar.gz .
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact }}
+          path: |
+            tefter-desktop-linux-amd64.tar.gz
+            desktop/build/bin/Tefter.app.zip
+            desktop/build/bin/tefter-desktop.exe
+          if-no-files-found: ignore
+
+  release:
+    needs: [server, desktop]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with: { merge-multiple: true, path: dist }
+      - uses: softprops/action-gh-release@v2
+        with:
+          files: dist/**
+          generate_release_notes: true