ui: improve Compose stability and message UI

- Add minute/second abbreviations and kotlin.time-based relative time formatter
- Introduce FastPreview and update previews to use AppTheme with dark/dynamic colors
- Refactor attachments preview grid & waveform to use ImmutableList and reduce recompositions
- Tweak message bubble reply styling and swipe-to-reply animation/haptics
- Add Compose Stability Analyzer plugin and enable it in debug builds
- Cache shared images by sha256 and improve share intent/chooser text
- Minor UX polish (e.g., “No views”) and immutability annotations

core/ui/src/main/res/values-ru/strings.xml

@@ -232,8 +232,10 @@
     <string name="month_short">М</string>
     <string name="week_short">Н</string>
     <string name="day_short">Д</string>
+    <string name="second_short">С</string>
     <string name="time_now">Сейчас</string>
 
     <string name="confirm_chat_create_with_title">Вы действительно хотите создать чат «%s»?</string>
     <string name="confirm_chat_create_empty_with_title">Вы действительно хотите создать чат «%s» только с собой?</string>
+    <string name="minute_short">М</string>
 </resources>