feat: ship v0.9.0 with pomodoro, achievements, and injection history

Add pomodoro timer with goal notifications, writing streak milestones, and knowledge injection logging with UI previews across AI writing flows.

Co-authored-by: Cursor <cursoragent@cursor.com>

public/locales/en/translation.json

@@ -224,6 +224,28 @@
   "cockpit.todayProgress": "Today {{current}} / {{goal}} words",
   "cockpit.streak": "{{days}}-day streak",
   "cockpit.heatmap": "Writing heatmap",
+  "cockpit.achievements": "Writing achievements",
+  "cockpit.pomodoroToday": "{{count}} pomodoros today",
+  "pomodoro.start": "Start pomodoro",
+  "pomodoro.pause": "Pause",
+  "pomodoro.resume": "Resume",
+  "pomodoro.cancel": "Cancel",
+  "pomodoro.complete": "Pomodoro complete! {{words}} words written",
+  "pomodoro.switchedBook": "Book switched — pomodoro cancelled",
+  "goal.dailyMet": "Daily goal met: {{current}} / {{goal}} words",
+  "achievement.streak7": "7-day streak",
+  "achievement.streak30": "30-day streak",
+  "achievement.streak100": "100-day streak",
+  "achievement.unlocked": "Achievement unlocked: {{name}}",
+  "knowledge.injectionHistory": "Injection history",
+  "knowledge.injectionPreview": "Recent injections",
+  "knowledge.injectionEntry": "{{date}} · {{mode}} · {{chapter}}",
+  "knowledge.injectionMode.interactive": "Interactive",
+  "knowledge.injectionMode.auto": "Auto writing",
+  "knowledge.injectionMode.wizard": "Wizard",
+  "settings.pomodoroDuration": "Pomodoro duration (minutes)",
+  "settings.systemNotifications": "Enable system notifications",
+  "settings.goalNotifications": "Enable goal notifications",
   "bridge.title": "Chapter bridge",
   "bridge.loading": "Analyzing…",
   "bridge.previousTail": "Previous chapter ending",