Fix vote widget to show actual voting date instead of hardcoded Today

When rating for a previous day (e.g., rating last night for yesterday),
the medium vote widget now correctly shows the date like "Sun, Dec 28"
instead of always displaying "Today".

- Add votingDate property to VoteWidgetEntry
- Add dynamic date formatting in VotedStatsView
- Update all preview entries with votingDate parameter

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

FeelsWidget2/WidgetModels.swift

@@ -56,6 +56,7 @@ struct SimpleEntry: TimelineEntry {
 
 struct VoteWidgetEntry: TimelineEntry {
     let date: Date
+    let votingDate: Date
     let hasSubscription: Bool
     let hasVotedToday: Bool
     let todaysMood: Mood?