add export features

.gitignore

@@ -5,3 +5,4 @@ backend/uploads/
 .DS_Store
 frontend/dist/
 frontend-vue/dist
+.npm/**

backend/src/app.ts

@@ -4,6 +4,7 @@ import * as ChannelRoutes from "./routes/channel";
 import * as FileRoutes from "./routes/file";
 import * as MessageRoutes from "./routes/message";
 import * as SearchRoutes from "./routes/search";
+import * as BackupRoutes from "./routes/backup";
 import { authenticate } from "./middleware/auth";
 import { initializeDB } from "./db";
 import { FRONTEND_DIR, UPLOAD_DIR } from "./config";
@@ -20,6 +21,7 @@ app.use("/channels", ChannelRoutes.router);
 app.use("/channels/:channelId/messages", MessageRoutes.router);
 app.use("/channels/:channelId/messages/:messageId/files", FileRoutes.router);
 app.use("/search", SearchRoutes.router);
+app.use("/backup", BackupRoutes.router);
 
 app.get('/check-token', authenticate, (req, res) => {
     res.json({ message: 'Token is valid' });

backend/src/routes/backup.ts

@@ -0,0 +1,162 @@
+import { Router, type Request, type Response } from 'express';
+import { authenticate } from '../middleware/auth';
+import { db, FTS5Enabled } from '../db';
+import { DB_PATH } from '../config';
+import { logger } from '../globals';
+import Database from 'better-sqlite3';
+import multer from 'multer';
+import { unlink } from 'fs/promises';
+import { tmpdir } from 'os';
+import { join } from 'path';
+
+export const router = Router();
+
+const upload = multer({ dest: tmpdir() });
+
+// GET /backup - Download the entire database as a .db file
+router.get('/', authenticate, async (req: Request, res: Response) => {
+  try {
+    logger.info('Creating database backup...');
+
+    // Use better-sqlite3's backup API to create a safe copy
+    const backupPath = join(tmpdir(), `notebrook-backup-${Date.now()}.db`);
+    await db.backup(backupPath);
+
+    const timestamp = new Date().toISOString().split('T')[0];
+    const filename = `notebrook-backup-${timestamp}.db`;
+
+    res.download(backupPath, filename, async (err) => {
+      // Clean up temp file after download
+      try {
+        await unlink(backupPath);
+      } catch (e) {
+        logger.warn(`Failed to clean up backup temp file: ${e}`);
+      }
+
+      if (err) {
+        logger.critical(`Backup download error: ${err}`);
+      } else {
+        logger.info('Backup download completed');
+      }
+    });
+  } catch (error) {
+    logger.critical(`Backup failed: ${error}`);
+    res.status(500).json({ error: 'Failed to create backup' });
+  }
+});
+
+// POST /restore - Upload a .db file and restore the database
+router.post('/', authenticate, upload.single('database'), async (req: Request, res: Response) => {
+  if (!req.file) {
+    return res.status(400).json({ error: 'No database file provided' });
+  }
+
+  const uploadedPath = req.file.path;
+
+  try {
+    logger.info(`Restoring database from uploaded file: ${uploadedPath}`);
+
+    // Open the uploaded database to validate and read data
+    const uploadedDb = new Database(uploadedPath, { readonly: true });
+
+    // Validate that it has the expected tables
+    const tables = uploadedDb.prepare(`SELECT name FROM sqlite_master WHERE type='table'`).all() as { name: string }[];
+    const tableNames = tables.map(t => t.name);
+
+    if (!tableNames.includes('channels') || !tableNames.includes('messages')) {
+      uploadedDb.close();
+      await unlink(uploadedPath);
+      return res.status(400).json({ error: 'Invalid backup file: missing required tables' });
+    }
+
+    // Read all data from uploaded database
+    const channels = uploadedDb.prepare('SELECT * FROM channels').all();
+    const messages = uploadedDb.prepare('SELECT * FROM messages').all();
+    const files = tableNames.includes('files')
+      ? uploadedDb.prepare('SELECT * FROM files').all()
+      : [];
+    const meta = tableNames.includes('meta')
+      ? uploadedDb.prepare('SELECT * FROM meta').all()
+      : [];
+
+    uploadedDb.close();
+
+    // Begin transaction to restore data
+    const transaction = db.transaction(() => {
+      // Clear existing data (order matters due to foreign keys)
+      if (FTS5Enabled) {
+        db.exec('DELETE FROM messages_fts');
+      }
+      db.exec('DELETE FROM messages');
+      db.exec('DELETE FROM files');
+      db.exec('DELETE FROM channels');
+
+      // Reset auto-increment counters
+      db.exec(`DELETE FROM sqlite_sequence WHERE name IN ('channels', 'messages', 'files')`);
+
+      // Insert channels
+      if (channels.length > 0) {
+        const insertChannel = db.prepare(`
+          INSERT INTO channels (id, name, created_at) VALUES (@id, @name, @created_at)
+        `);
+        for (const channel of channels) {
+          insertChannel.run(channel);
+        }
+      }
+
+      // Insert files first (messages reference files)
+      if (files.length > 0) {
+        const insertFile = db.prepare(`
+          INSERT INTO files (id, channel_id, file_path, file_type, file_size, original_name, created_at)
+          VALUES (@id, @channel_id, @file_path, @file_type, @file_size, @original_name, @created_at)
+        `);
+        for (const file of files) {
+          insertFile.run(file);
+        }
+      }
+
+      // Insert messages
+      if (messages.length > 0) {
+        const insertMessage = db.prepare(`
+          INSERT INTO messages (id, channel_id, content, file_id, checked, created_at)
+          VALUES (@id, @channel_id, @content, @file_id, @checked, @created_at)
+        `);
+        for (const message of messages) {
+          insertMessage.run(message);
+        }
+
+        // Rebuild FTS index
+        if (FTS5Enabled) {
+          db.exec(`INSERT INTO messages_fts(messages_fts) VALUES('rebuild')`);
+        }
+      }
+    });
+
+    transaction();
+
+    // Clean up uploaded file
+    await unlink(uploadedPath);
+
+    logger.info('Database restore completed successfully');
+    res.json({
+      success: true,
+      message: 'Database restored successfully',
+      stats: {
+        channels: channels.length,
+        messages: messages.length,
+        files: files.length
+      }
+    });
+  } catch (error) {
+    logger.critical(`Restore failed: ${error}`);
+
+    // Clean up uploaded file on error
+    try {
+      await unlink(uploadedPath);
+    } catch (e) {
+      // Ignore cleanup errors
+    }
+
+    res.status(500).json({ error: 'Failed to restore database: ' + (error as Error).message });
+  }
+});

backend/src/server.ts

@@ -43,10 +43,9 @@ const getOrCreateCertificate = async () => {
 }
 
 const createSelfSignedSSLCert = async () => {
-  const selfsigned = await import('selfsigned');
+  const pems = await selfSigned.generate([{ name: 'commonName', value: 'localhost' }], {
-  const pems = selfsigned.generate([{ name: 'Notebrook Self Signed Auto Generated Key', value: 'localhost' }], {
     keySize: 2048,
-    days: 365
+    algorithm: 'sha256'
   });
   return {
     key: pems.private,

frontend-vue/package-lock.json

@@ -8,9 +8,11 @@
       "name": "notebrook-frontend-vue",
       "version": "1.0.0",
       "dependencies": {
+        "@types/jszip": "^3.4.0",
         "@vueuse/core": "^14.1.0",
         "@vueuse/sound": "^2.1.3",
         "idb-keyval": "^6.2.2",
+        "jszip": "^3.10.1",
         "pinia": "^3.0.4",
         "vue": "^3.5.25",
         "vue-router": "^4.6.3"
@@ -2859,6 +2861,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/jszip": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/@types/jszip/-/jszip-3.4.0.tgz",
+      "integrity": "sha512-GFHqtQQP3R4NNuvZH3hNCYD0NbyBZ42bkN7kO3NDrU/SnvIZWMS8Bp38XCsRKBT5BXvgm0y1zqpZWp/ZkRzBzg==",
+      "license": "MIT",
+      "dependencies": {
+        "jszip": "*"
+      }
+    },
     "node_modules/@types/node": {
       "version": "24.10.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-24.10.1.tgz",
@@ -4384,6 +4395,12 @@
         "url": "https://opencollective.com/core-js"
       }
     },
+    "node_modules/core-util-is": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
+      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ==",
+      "license": "MIT"
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -5717,6 +5734,12 @@
         "node": ">= 4"
       }
     },
+    "node_modules/immediate": {
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/immediate/-/immediate-3.0.6.tgz",
+      "integrity": "sha512-XXOFtyqDjNDAQxVfYxuF7g9Il/IbWmmlQg2MYKOH8ExIT1qg6xc4zyS3HaEEATgs1btfzxq15ciUiY7gjSXRGQ==",
+      "license": "MIT"
+    },
     "node_modules/import-fresh": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.3.1.tgz",
@@ -5744,6 +5767,12 @@
         "node": ">=0.8.19"
       }
     },
+    "node_modules/inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+      "license": "ISC"
+    },
     "node_modules/internal-slot": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/internal-slot/-/internal-slot-1.1.0.tgz",
@@ -6358,6 +6387,18 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/jszip": {
+      "version": "3.10.1",
+      "resolved": "https://registry.npmjs.org/jszip/-/jszip-3.10.1.tgz",
+      "integrity": "sha512-xXDvecyTpGLrqFrvkrUSoxxfJI5AH7U8zxxtVclpsUtMCq4JQ290LY8AW5c7Ggnr/Y/oK+bQMbqK2qmtk3pN4g==",
+      "license": "(MIT OR GPL-3.0-or-later)",
+      "dependencies": {
+        "lie": "~3.3.0",
+        "pako": "~1.0.2",
+        "readable-stream": "~2.3.6",
+        "setimmediate": "^1.0.5"
+      }
+    },
     "node_modules/keyv": {
       "version": "4.5.4",
       "resolved": "https://registry.npmjs.org/keyv/-/keyv-4.5.4.tgz",
@@ -6392,6 +6433,15 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/lie": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/lie/-/lie-3.3.0.tgz",
+      "integrity": "sha512-UaiMJzeWRlEujzAuw5LokY1L5ecNQYZKfmyZ9L7wDHb/p5etKaxXhohBcrw0EYby+G/NA52vRSN4N39dxHAIwQ==",
+      "license": "MIT",
+      "dependencies": {
+        "immediate": "~3.0.5"
+      }
+    },
     "node_modules/locate-path": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
@@ -6699,6 +6749,12 @@
       "dev": true,
       "license": "BlueOak-1.0.0"
     },
+    "node_modules/pako": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
+      "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
+      "license": "(MIT AND Zlib)"
+    },
     "node_modules/parent-module": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
@@ -6932,6 +6988,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/process-nextick-args": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
+      "license": "MIT"
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -6973,6 +7035,33 @@
         "safe-buffer": "^5.1.0"
       }
     },
+    "node_modules/readable-stream": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
+      "integrity": "sha512-8p0AUk4XODgIewSi0l8Epjs+EVnWiK7NoDIEGU0HhE7+ZyY8D1IMY7odu5lRrFXGg71L15KG8QrPmum45RTtdA==",
+      "license": "MIT",
+      "dependencies": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      }
+    },
+    "node_modules/readable-stream/node_modules/isarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+      "integrity": "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ==",
+      "license": "MIT"
+    },
+    "node_modules/readable-stream/node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "license": "MIT"
+    },
     "node_modules/reflect.getprototypeof": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/reflect.getprototypeof/-/reflect.getprototypeof-1.0.10.tgz",
@@ -7345,6 +7434,12 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/setimmediate": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
+      "integrity": "sha512-MATJdZp8sLqDl/68LfQmbP8zKPLQNV6BIZoIgrscFDQ+RsvK/BxeDQOgyxKKoh0y/8h3BqVFnCqQ/gd+reiIXA==",
+      "license": "MIT"
+    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -7539,6 +7634,21 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "license": "MIT",
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
+    "node_modules/string_decoder/node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "license": "MIT"
+    },
     "node_modules/string-width": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
@@ -8325,7 +8435,6 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/vite": {

frontend-vue/package.json

@@ -12,27 +12,29 @@
     "format": "prettier --write src/"
   },
   "dependencies": {
-    "vue": "^3.5.25",
+    "@types/jszip": "^3.4.0",
-    "vue-router": "^4.6.3",
-    "pinia": "^3.0.4",
-    "idb-keyval": "^6.2.2",
     "@vueuse/core": "^14.1.0",
-    "@vueuse/sound": "^2.1.3"
+    "@vueuse/sound": "^2.1.3",
+    "idb-keyval": "^6.2.2",
+    "jszip": "^3.10.1",
+    "pinia": "^3.0.4",
+    "vue": "^3.5.25",
+    "vue-router": "^4.6.3"
   },
   "devDependencies": {
     "@types/node": "^24.10.1",
-    "@vitejs/plugin-vue": "^6.0.2",
-    "@vue/tsconfig": "^0.8.1",
-    "typescript": "^5.9.3",
-    "vite": "^7.2.6",
-    "vue-tsc": "^3.1.5",
-    "vite-plugin-pwa": "^1.2.0",
     "@typescript-eslint/eslint-plugin": "^8.48.1",
     "@typescript-eslint/parser": "^8.48.1",
+    "@vitejs/plugin-vue": "^6.0.2",
     "@vue/eslint-config-prettier": "^10.2.0",
     "@vue/eslint-config-typescript": "^14.6.0",
+    "@vue/tsconfig": "^0.8.1",
     "eslint": "^9.39.1",
     "eslint-plugin-vue": "^10.6.2",
-    "prettier": "^3.7.3"
+    "prettier": "^3.7.3",
+    "typescript": "^5.9.3",
+    "vite": "^7.2.6",
+    "vite-plugin-pwa": "^1.2.0",
+    "vue-tsc": "^3.1.5"
   }
 }

frontend-vue/src/components/chat/MessageItem.vue

@@ -313,14 +313,22 @@ const handleFocus = () => {
 
 const toggleAriaLabel = computed(() => {
   if (isChecked.value === true) return 'Mark as unchecked'
-  if (isChecked.value === false) return 'Mark as checked'
+  if (isChecked.value === false) return 'Remove check'
   return 'Mark as checked'
 })
 
 const toggleChecked = async () => {
   if (props.isUnsent) return
   const msg = props.message as ExtendedMessage
-  const next = isChecked.value !== true
+  // Cycle: null → true → false → null
+  let next: boolean | null
+  if (isChecked.value === null) {
+    next = true
+  } else if (isChecked.value === true) {
+    next = false
+  } else {
+    next = null
+  }
   const prev = isChecked.value
   try {
     // optimistic

frontend-vue/src/components/dialogs/SettingsDialog.vue

@@ -146,6 +146,69 @@
         </div>
       </div>
 
+      <div class="setting-group">
+        <h3>Data Backup</h3>
+
+        <p class="setting-description">
+          Download a complete backup of all channels, messages, and data. Restore will replace all existing data.
+        </p>
+
+        <div class="setting-actions">
+          <BaseButton
+            type="button"
+            variant="secondary"
+            @click="handleBackup"
+            :loading="isBackingUp"
+          >
+            Download Backup
+          </BaseButton>
+
+          <BaseButton
+            type="button"
+            variant="secondary"
+            @click="triggerRestoreInput"
+            :disabled="isRestoring"
+          >
+            Restore from Backup
+          </BaseButton>
+          <input
+            ref="restoreInput"
+            type="file"
+            accept=".db,.sqlite,.sqlite3"
+            style="display: none"
+            @change="handleRestoreFileSelect"
+          />
+        </div>
+      </div>
+
+      <div class="setting-group">
+        <h3>Export Data</h3>
+
+        <p class="setting-description">
+          Export all channels and messages in various formats.
+        </p>
+
+        <div class="setting-item">
+          <label for="export-format">Format</label>
+          <select id="export-format" v-model="exportFormat" class="select">
+            <option value="markdown">Markdown (zipped)</option>
+            <option value="html-single">HTML (single file)</option>
+            <option value="html-individual">HTML (individual files, zipped)</option>
+          </select>
+        </div>
+
+        <div class="setting-actions">
+          <BaseButton
+            type="button"
+            variant="secondary"
+            @click="handleExport"
+            :loading="isExporting"
+          >
+            Export
+          </BaseButton>
+        </div>
+      </div>
+
       <div class="setting-group">
         <h3>Account</h3>
 
@@ -218,6 +281,34 @@
         </div>
       </div>
     </div>
+
+    <!-- Restore Confirmation Dialog -->
+    <div v-if="showRestoreConfirm" class="confirm-overlay">
+      <div class="confirm-dialog">
+        <h3>Restore from Backup</h3>
+        <p>This will replace all existing data with the backup. All current channels, messages, and data will be overwritten. This cannot be undone.</p>
+        <p v-if="pendingRestoreFile" class="file-info">
+          File: {{ pendingRestoreFile.name }}
+        </p>
+        <div class="confirm-actions">
+          <BaseButton
+            type="button"
+            variant="secondary"
+            @click="cancelRestore"
+          >
+            Cancel
+          </BaseButton>
+          <BaseButton
+            type="button"
+            variant="danger"
+            @click="handleRestore"
+            :loading="isRestoring"
+          >
+            Restore Backup
+          </BaseButton>
+        </div>
+      </div>
+    </div>
   </div>
 </template>
 
@@ -228,6 +319,8 @@ import { useAppStore } from '@/stores/app'
 import { useAuthStore } from '@/stores/auth'
 import { useToastStore } from '@/stores/toast'
 import { useAudio } from '@/composables/useAudio'
+import { apiService } from '@/services/api'
+import { getExporter, downloadBlob, type ExportFormat } from '@/utils/export'
 import { clear } from 'idb-keyval'
 import BaseButton from '@/components/base/BaseButton.vue'
 import type { AppSettings } from '@/types'
@@ -244,9 +337,16 @@ const { availableVoices, speak, setVoice } = useAudio()
 
 const isSaving = ref(false)
 const isResetting = ref(false)
+const isBackingUp = ref(false)
+const isRestoring = ref(false)
+const isExporting = ref(false)
+const exportFormat = ref<ExportFormat>('markdown')
 const showResetConfirm = ref(false)
+const showRestoreConfirm = ref(false)
+const pendingRestoreFile = ref<File | null>(null)
 const selectedVoiceURI = ref('')
 const soundInput = ref()
+const restoreInput = ref<HTMLInputElement>()
 
 // Computed property for current server URL
 const currentServerUrl = computed(() => authStore.serverUrl)
@@ -334,6 +434,85 @@ const handleResetData = async () => {
   }
 }
 
+const handleBackup = async () => {
+  isBackingUp.value = true
+
+  try {
+    await apiService.downloadBackup()
+    toastStore.success('Backup downloaded successfully')
+  } catch (error) {
+    console.error('Backup failed:', error)
+    toastStore.error('Failed to download backup')
+  } finally {
+    isBackingUp.value = false
+  }
+}
+
+const triggerRestoreInput = () => {
+  restoreInput.value?.click()
+}
+
+const handleRestoreFileSelect = (event: Event) => {
+  const input = event.target as HTMLInputElement
+  const file = input.files?.[0]
+
+  if (file) {
+    pendingRestoreFile.value = file
+    showRestoreConfirm.value = true
+  }
+
+  // Reset input so the same file can be selected again
+  input.value = ''
+}
+
+const handleRestore = async () => {
+  if (!pendingRestoreFile.value) return
+
+  isRestoring.value = true
+
+  try {
+    const result = await apiService.restoreBackup(pendingRestoreFile.value)
+    toastStore.success(`Restored ${result.stats.channels} channels, ${result.stats.messages} messages`)
+
+    // Clear local cache and reload data
+    await clear()
+    appStore.$reset()
+
+    showRestoreConfirm.value = false
+    pendingRestoreFile.value = null
+    emit('close')
+
+    // Reload the page to refresh all data
+    window.location.reload()
+  } catch (error) {
+    console.error('Restore failed:', error)
+    toastStore.error((error as Error).message || 'Failed to restore backup')
+  } finally {
+    isRestoring.value = false
+  }
+}
+
+const cancelRestore = () => {
+  showRestoreConfirm.value = false
+  pendingRestoreFile.value = null
+}
+
+const handleExport = async () => {
+  isExporting.value = true
+
+  try {
+    const exporter = getExporter(exportFormat.value)
+    const blob = await exporter.export(appStore.channels, appStore.messages)
+    downloadBlob(blob, exporter.filename)
+    toastStore.success('Export completed')
+  } catch (error) {
+    console.error('Export failed:', error)
+    toastStore.error('Export failed')
+  } finally {
+    isExporting.value = false
+  }
+}
+
 onMounted(() => {
   // Copy current settings to local state
   Object.assign(localSettings, appStore.settings)
@@ -382,6 +561,22 @@ onMounted(() => {
   color: #374151;
 }
 
+.setting-description {
+  margin: 0;
+  font-size: 0.875rem;
+  color: #6b7280;
+  line-height: 1.5;
+}
+
+.file-info {
+  font-family: monospace;
+  font-size: 0.875rem;
+  background: #f3f4f6;
+  padding: 0.5rem;
+  border-radius: 4px;
+  word-break: break-all;
+}
+
 .checkbox {
   width: 1.25rem;
   height: 1.25rem;
@@ -543,5 +738,14 @@ onMounted(() => {
   .confirm-dialog p {
     color: rgba(255, 255, 255, 0.6);
   }
+
+  .setting-description {
+    color: rgba(255, 255, 255, 0.6);
+  }
+
+  .file-info {
+    background: #374151;
+    color: rgba(255, 255, 255, 0.87);
+  }
 }
 </style>

frontend-vue/src/components/dialogs/VoiceRecordingDialog.vue

@@ -230,7 +230,7 @@ let animationInterval: number | null = null
 
 const startWaveAnimation = () => {
   waveAnimation.value = Array.from({ length: 20 }, () => Math.random() * 40 + 10)
-  animationInterval = setInterval(() => {
+  animationInterval = window.setInterval(() => {
     waveAnimation.value = waveAnimation.value.map(() => Math.random() * 40 + 10)
   }, 150)
 }

frontend-vue/src/composables/useAudio.ts

@@ -248,7 +248,7 @@ export function useAudio() {
       recordingStartTime = Date.now()
 
       // Update duration every 100ms
-      recordingInterval = setInterval(() => {
+      recordingInterval = window.setInterval(() => {
         recording.value.duration = (Date.now() - recordingStartTime) / 1000
       }, 100)
 

frontend-vue/src/composables/useOfflineSync.ts

@@ -119,7 +119,7 @@ export function useOfflineSync() {
   const startAutoSave = () => {
     if (syncInterval) clearInterval(syncInterval)
     
-    syncInterval = setInterval(async () => {
+    syncInterval = window.setInterval(async () => {
       try {
         await appStore.saveState()
         

frontend-vue/src/services/api.ts

@@ -167,6 +167,55 @@ class ApiService {
   getFileUrl(filePath: string): string {
     return `${this.baseUrl}/uploads/${filePath.replace(/^.*\/uploads\//, '')}`
   }
+
+  // Backup - returns a download URL
+  async downloadBackup(): Promise<void> {
+    const response = await fetch(`${this.baseUrl}/backup`, {
+      headers: { Authorization: this.token }
+    })
+
+    if (!response.ok) {
+      throw new Error(`Backup failed: ${response.status} ${response.statusText}`)
+    }
+
+    // Get filename from Content-Disposition header or use default
+    const contentDisposition = response.headers.get('Content-Disposition')
+    let filename = 'notebrook-backup.db'
+    if (contentDisposition) {
+      const match = contentDisposition.match(/filename="?(.+?)"?(?:;|$)/)
+      if (match && match[1]) filename = match[1]
+    }
+
+    // Download the file
+    const blob = await response.blob()
+    const url = window.URL.createObjectURL(blob)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = filename
+    document.body.appendChild(a)
+    a.click()
+    document.body.removeChild(a)
+    window.URL.revokeObjectURL(url)
+  }
+
+  // Restore - upload a .db file
+  async restoreBackup(file: File): Promise<{ success: boolean; message: string; stats: { channels: number; messages: number; files: number } }> {
+    const formData = new FormData()
+    formData.append('database', file)
+
+    const response = await fetch(`${this.baseUrl}/backup`, {
+      method: 'POST',
+      headers: { Authorization: this.token },
+      body: formData
+    })
+
+    if (!response.ok) {
+      const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+      throw new Error(error.error || `Restore failed: ${response.status} ${response.statusText}`)
+    }
+
+    return response.json()
+  }
 }
 
 export const apiService = new ApiService()

frontend-vue/src/utils/export.ts

@@ -0,0 +1,201 @@
+import JSZip from 'jszip'
+import type { Channel, ExtendedMessage } from '@/types'
+
+export type ExportFormat = 'markdown' | 'html-single' | 'html-individual'
+
+interface Exporter {
+  export(channels: Channel[], messages: Record<number, ExtendedMessage[]>): Promise<Blob>
+  filename: string
+  mimeType: string
+}
+
+function getDateString(): string {
+  return new Date().toISOString().split('T')[0] ?? 'export'
+}
+
+function escapeHtml(text: string): string {
+  return text
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+    .replace(/'/g, '&#039;')
+}
+
+function formatTimestamp(dateString: string): string {
+  return new Date(dateString).toLocaleString()
+}
+
+function sanitizeFilename(name: string): string {
+  return name.replace(/[<>:"/\\|?*]/g, '_').trim() || 'untitled'
+}
+
+// ============ Markdown Exporter ============
+
+class MarkdownExporter implements Exporter {
+  get filename(): string {
+    return `notebrook-export-${getDateString()}.zip`
+  }
+
+  get mimeType(): string {
+    return 'application/zip'
+  }
+
+  async export(channels: Channel[], messages: Record<number, ExtendedMessage[]>): Promise<Blob> {
+    const zip = new JSZip()
+
+    for (const channel of channels) {
+      const channelMessages = messages[channel.id] || []
+      const content = this.formatChannel(channel, channelMessages)
+      const filename = `${sanitizeFilename(channel.name)}.md`
+      zip.file(filename, content)
+    }
+
+    return zip.generateAsync({ type: 'blob' })
+  }
+
+  private formatChannel(channel: Channel, messages: ExtendedMessage[]): string {
+    const lines: string[] = []
+    lines.push(`# ${channel.name}`)
+    lines.push('')
+
+    for (const msg of messages) {
+      const timestamp = formatTimestamp(msg.created_at)
+      lines.push(`## ${timestamp}`)
+      lines.push('')
+      lines.push(`### ${msg.content}`)
+      lines.push('')
+    }
+
+    return lines.join('\n')
+  }
+}
+
+// ============ HTML Single Exporter ============
+
+class HtmlSingleExporter implements Exporter {
+  get filename(): string {
+    return `notebrook-export-${getDateString()}.html`
+  }
+
+  get mimeType(): string {
+    return 'text/html'
+  }
+
+  async export(channels: Channel[], messages: Record<number, ExtendedMessage[]>): Promise<Blob> {
+    const html = this.generateHtml(channels, messages)
+    return new Blob([html], { type: this.mimeType })
+  }
+
+  private generateHtml(channels: Channel[], messages: Record<number, ExtendedMessage[]>): string {
+    const body: string[] = []
+
+    for (const channel of channels) {
+      const channelMessages = messages[channel.id] || []
+      body.push(`<h2>${escapeHtml(channel.name)}</h2>`)
+
+      for (const msg of channelMessages) {
+        const timestamp = formatTimestamp(msg.created_at)
+        body.push(`<h3>${escapeHtml(timestamp)}</h3>`)
+        body.push(`<h4>${escapeHtml(msg.content)}</h4>`)
+      }
+    }
+
+    return `<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Notebrook Export</title>
+  <style>
+    body { font-family: system-ui, -apple-system, sans-serif; max-width: 800px; margin: 0 auto; padding: 2rem; line-height: 1.6; }
+    h1 { border-bottom: 2px solid #333; padding-bottom: 0.5rem; }
+    h2 { margin-top: 2rem; color: #2563eb; }
+    h3 { font-size: 0.875rem; color: #6b7280; margin-bottom: 0.25rem; }
+    h4 { margin-top: 0; font-weight: normal; white-space: pre-wrap; }
+  </style>
+</head>
+<body>
+  <h1>Notebrook Export</h1>
+  ${body.join('\n  ')}
+</body>
+</html>`
+  }
+}
+
+// ============ HTML Individual Exporter ============
+
+class HtmlIndividualExporter implements Exporter {
+  get filename(): string {
+    return `notebrook-export-${getDateString()}.zip`
+  }
+
+  get mimeType(): string {
+    return 'application/zip'
+  }
+
+  async export(channels: Channel[], messages: Record<number, ExtendedMessage[]>): Promise<Blob> {
+    const zip = new JSZip()
+
+    for (const channel of channels) {
+      const channelMessages = messages[channel.id] || []
+      const html = this.generateChannelHtml(channel, channelMessages)
+      const filename = `${sanitizeFilename(channel.name)}.html`
+      zip.file(filename, html)
+    }
+
+    return zip.generateAsync({ type: 'blob' })
+  }
+
+  private generateChannelHtml(channel: Channel, messages: ExtendedMessage[]): string {
+    const body: string[] = []
+
+    for (const msg of messages) {
+      const timestamp = formatTimestamp(msg.created_at)
+      body.push(`<h2>${escapeHtml(timestamp)}</h2>`)
+      body.push(`<h3>${escapeHtml(msg.content)}</h3>`)
+    }
+
+    return `<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>${escapeHtml(channel.name)} - Notebrook Export</title>
+  <style>
+    body { font-family: system-ui, -apple-system, sans-serif; max-width: 800px; margin: 0 auto; padding: 2rem; line-height: 1.6; }
+    h1 { border-bottom: 2px solid #333; padding-bottom: 0.5rem; }
+    h2 { font-size: 0.875rem; color: #6b7280; margin-bottom: 0.25rem; }
+    h3 { margin-top: 0; font-weight: normal; white-space: pre-wrap; }
+  </style>
+</head>
+<body>
+  <h1>${escapeHtml(channel.name)}</h1>
+  ${body.join('\n  ')}
+</body>
+</html>`
+  }
+}
+
+// ============ Factory ============
+
+const exporters: Record<ExportFormat, Exporter> = {
+  'markdown': new MarkdownExporter(),
+  'html-single': new HtmlSingleExporter(),
+  'html-individual': new HtmlIndividualExporter()
+}
+
+export function getExporter(format: ExportFormat): Exporter {
+  return exporters[format]
+}
+
+export function downloadBlob(blob: Blob, filename: string): void {
+  const url = window.URL.createObjectURL(blob)
+  const a = document.createElement('a')
+  a.href = url
+  a.download = filename
+  document.body.appendChild(a)
+  a.click()
+  document.body.removeChild(a)
+  window.URL.revokeObjectURL(url)
+}