Merge release/v2.14.0 into chore/floret-implementation

Brings the 2.14.0 feature set (Month week numbers, .ics restore +
per-calendar export picker, Day view on date-header tap, wrapped long
titles, Simplified Chinese) onto the floret-kit migration without
resurrecting the inline component copies the kit now owns.

Conflict resolutions (both were import-block collisions where the
migration repointed to de.jeanlucmakiola.floret.* while release kept the
old app-local imports):

- CalendarsScreen.kt: keep the kit imports (CollapsingScaffold,
  DialogAmountField/DialogUnitDropdown, collapseExit/expandEnter,
  predictiveBack) and repoint FullScreenPicker + positionOf to the kit
  (both moved out of ui.common). Keep the genuinely app-local
  LeadingAvatar/SourceLogo/curatedSourcePackage; drop the renamed
  calendarCollapseExit/calendarExpandEnter (0 uses).
- ImportScreen.kt: keep the app-local CalendarPickerGroups, use the kit's
  predictiveBack, drop the now-unused OptionCard import.

Semantic fixup: CalendarPickerGroups.kt (new in 2.14.0) relied on
same-package resolution of GroupedRow/Position, which the migration moved
to the kit — added the explicit floret.components imports.

Verified: :app:compileDebugKotlin, ./gradlew test (app + kit), and
scripts/check_translations.py all green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/src/main/res/values/strings.xml

@@ -289,6 +289,8 @@
     <string name="settings_font_import_failed">Couldn\'t read that file as a font</string>
     <string name="settings_week_start">Week starts on</string>
     <string name="settings_week_start_auto">Automatic</string>
+    <string name="settings_week_numbers">Week numbers</string>
+    <string name="settings_week_numbers_summary">Show calendar-week numbers in month view</string>
     <string name="settings_time_format">Time format</string>
     <string name="settings_time_format_auto">Automatic</string>
     <string name="settings_time_format_12h">12-hour (2:00 PM)</string>
@@ -430,6 +432,12 @@
     <string name="calendars_backup_header">Backup</string>
     <string name="calendars_backup_hint">Local calendars aren\'t synced anywhere, so export them to an .ics file to keep a copy.</string>
     <string name="calendars_backup_action">Export as .ics file</string>
+    <string name="calendars_export_title">Export calendars</string>
+    <string name="calendars_export_hint">Choose which calendars to include in the .ics file.</string>
+    <string name="calendars_export_action">Export</string>
+    <string name="calendars_restore_header">Restore</string>
+    <string name="calendars_restore_action">Restore from .ics file</string>
+    <string name="calendars_restore_hint">Import events from a backup or another calendar app.</string>
     <string name="calendars_auto_backup">Automatic backup</string>
     <string name="calendars_auto_backup_hint">Periodically export your local calendars to a folder as an .ics file.</string>
     <string name="calendars_auto_backup_folder">Backup folder</string>
@@ -462,11 +470,19 @@
     <string name="import_failed">Couldn\'t read this file.</string>
     <string name="import_no_calendar">No writable calendar to import into. Create a local calendar first.</string>
     <string name="import_done_title">Import complete</string>
+    <string name="import_done_dedup_note">Events already in the calendar were skipped.</string>
+    <string name="import_done_added_label">Added</string>
+    <string name="import_done_skipped_label">Duplicates</string>
     <string name="import_close">Close</string>
     <string name="import_warning_recurrence">Some changed occurrences of recurring events were skipped.</string>
     <string name="import_warning_no_start">An event without a start time was skipped.</string>
     <string name="import_warning_attendees">Guest lists weren\'t imported.</string>
     <string name="import_warning_timezone">An unknown time zone fell back to your device\'s.</string>
+    <string name="import_button">Import</string>
+    <plurals name="import_title_count">
+        <item quantity="one">Importing %d event</item>
+        <item quantity="other">Importing %d events</item>
+    </plurals>
     <plurals name="import_event_count">
         <item quantity="one">%d event in this file.</item>
         <item quantity="other">%d events in this file.</item>

app/src/main/res/xml/locales_config.xml

@@ -12,4 +12,5 @@
     <locale android:name="de" />
     <locale android:name="es" />
     <locale android:name="it" />
+    <locale android:name="zh-CN" />
 </locale-config>