Add background bulk import for Komoot

Replace the per-tour import UI with a fire-and-forget background job:

- Add `import_batches` DB table tracking status, found/imported/duplicate counts
- Add `runKomootBulkImport` server function that pages all Komoot tours,
  fetches GPX, creates activities, and deduplicates via sync_imports
- Add `komoot-bulk-import` pg-boss job registered at server startup
- Add POST /api/sync/komoot/import to enqueue the job
- Add GET /api/sync/komoot/import-status to return the latest batch
- Replace the Komoot import page with a progress UI that polls every 2s
  while a batch is running and shows found/imported/skipped counts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/i18n/src/locales/de.ts

@@ -445,6 +445,23 @@ export default {
       connectSuccess: "Komoot-Konto verbunden.",
       authError: "Ungültige Komoot-Zugangsdaten. Bitte E-Mail und Passwort prüfen.",
       modeBadge: "Modus: {{mode}}",
+      import: {
+        noImportYet: "Es wurde noch kein Import durchgeführt. Klicke unten, um alle deine Komoot-Touren zu importieren.",
+        startImport: "Alle Touren importieren",
+        starting: "Wird gestartet…",
+        runAgain: "Erneut ausführen",
+        found: "Gefunden",
+        imported: "Importiert",
+        skipped: "Bereits importiert",
+        completedIn: "Abgeschlossen in {{duration}}",
+        viewActivities: "Aktivitäten ansehen",
+        status: {
+          pending: "In Warteschlange",
+          running: "Wird importiert…",
+          completed: "Abgeschlossen",
+          failed: "Fehlgeschlagen",
+        },
+      },
     },
     sync: {
       import: "Importieren",

packages/i18n/src/locales/en.ts

@@ -445,6 +445,23 @@ export default {
       connectSuccess: "Komoot account connected.",
       authError: "Invalid Komoot credentials. Please check your email and password.",
       modeBadge: "Mode: {{mode}}",
+      import: {
+        noImportYet: "No import has been run yet. Click the button below to import all your Komoot tours.",
+        startImport: "Import all tours",
+        starting: "Starting…",
+        runAgain: "Run again",
+        found: "Found",
+        imported: "Imported",
+        skipped: "Already imported",
+        completedIn: "Completed in {{duration}}",
+        viewActivities: "View your activities",
+        status: {
+          pending: "Queued",
+          running: "Importing…",
+          completed: "Completed",
+          failed: "Failed",
+        },
+      },
     },
     sync: {
       import: "Import",