feat: quick-capture bookmarklet

One-click job capture from any posting, reusing the existing
jobimport/preview parser.

- AddJobModal accepts initialUrl and auto-imports once on open
- App reads a /?add=<encoded url> param, opens Add Job pre-filled, and
  strips the param from the address bar
- QuickCaptureCard in Settings offers a draggable bookmarklet (href set
  via ref since React blocks javascript: URLs) plus copyable code
- EN/NB translations; README feature note
- 2 frontend tests; full suite green (22 suites / 50 tests)

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

job-tracker-ui/src/i18n/translations.ts

@@ -157,6 +157,11 @@ export const translations = {
     settingsOpenReminderInbox: "Open reminders",
     settingsReviewJobs: "Review jobs",
     settingsNotificationsTitle: "Notification settings",
+    settingsQuickCaptureTitle: "Quick capture bookmarklet",
+    settingsQuickCaptureSubtitle: "Drag this button to your bookmarks bar. On any job posting, click it to open Add Job pre-filled from that page.",
+    settingsQuickCaptureButton: "＋ Save to Jobbjakt",
+    settingsQuickCaptureDragHint: "Drag me to your bookmarks bar",
+    settingsQuickCaptureManual: "Or copy the bookmarklet code",
     settingsNotificationsBody: "Choose which reminders should show up in your workflow. SMTP delivery can be checked from the system page.",
     settingsNotificationsDelivery: "SMTP delivery and test mail live under Admin → System → Settings.",
     settingsNotificationsFollowUpReminders: "Email reminders for follow-ups",
@@ -1096,6 +1101,11 @@ export const translations = {
     settingsOpenReminderInbox: "Åpne påminnelser",
     settingsReviewJobs: "Gå til jobber",
     settingsNotificationsTitle: "Varslingsinnstillinger",
+    settingsQuickCaptureTitle: "Hurtiglagring (bokmerke)",
+    settingsQuickCaptureButton: "＋ Lagre til Jobbjakt",
+    settingsQuickCaptureSubtitle: "Dra denne knappen til bokmerkelinjen. På en stillingsannonse klikker du på den for å åpne Legg til jobb forhåndsutfylt fra siden.",
+    settingsQuickCaptureDragHint: "Dra meg til bokmerkelinjen",
+    settingsQuickCaptureManual: "Eller kopier bokmerkekoden",
     settingsNotificationsBody: "Velg hvilke påminnelser som skal vises i arbeidsflyten din. SMTP-levering kan kontrolleres fra systemsiden.",
     settingsNotificationsDelivery: "SMTP-levering og test-epost ligger under Admin → System → Innstillinger.",
     settingsNotificationsFollowUpReminders: "E-postpåminnelser for oppfølginger",