Fix Month view showing fake data and show all 5 moods in exports

- Fix critical bug in generateObjectNotInArray() that ignored the mood
  parameter and generated random moods instead of placeholders, causing
  Month view to display fake colored entries for days without real data
- Update Month and Year shareableView exports to show all 5 mood types
  even when some have 0 entries (previously filtered out empty moods)

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

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

Shared/Persisence/DataControllerHelper.swift

@@ -48,14 +48,9 @@ extension DataController {
 
     /// Creates an entry that is NOT inserted into the context - used for UI placeholders
     func generateObjectNotInArray(forDate date: Date = Date(), withMood mood: Mood = .placeholder) -> MoodEntryModel {
-        var moodValue = Int.random(in: 2...4)
-        if Int.random(in: 0...400) % 5 == 0 {
-            moodValue = Int.random(in: 0...4)
-        }
-
         let entry = MoodEntryModel(
             forDate: date,
-            moodValue: moodValue,
+            moodValue: mood.rawValue,
             entryType: EntryType.listView.rawValue,
             canEdit: false,
             canDelete: false