Update Neon colors and show color circles in theme picker

- Update NeonMoodTint to use synthwave colors matching Neon voting style
  (cyan, lime, yellow, orange, magenta)
- Replace text label with 5 color circles in theme preview Colors row
- Remove unused textColor customization code and picker views
- Add .id(moodTint) to Month/Year views for color refresh
- Clean up various unused color-related code

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

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

Shared/Persisence/DataControllerADD.swift

@@ -10,9 +10,12 @@ import Foundation
 
 extension DataController {
     func add(mood: Mood, forDate date: Date, entryType: EntryType) {
-        // Delete existing entry for this date if present
-        if let existing = getEntry(byDate: date) {
-            modelContext.delete(existing)
+        // Delete ALL existing entries for this date (handles duplicates)
+        let existing = getAllEntries(byDate: date)
+        for entry in existing {
+            modelContext.delete(entry)
+        }
+        if !existing.isEmpty {
             try? modelContext.save()
         }
 
@@ -50,15 +53,23 @@ extension DataController {
 
         let missing = Array(Set(allDates).subtracting(existingDates)).sorted(by: >)
 
+        guard !missing.isEmpty else { return }
+
+        // Batch insert all missing dates without triggering listeners
         for date in missing {
             // Add 12 hours to avoid UTC offset issues
             let adjustedDate = Calendar.current.date(byAdding: .hour, value: 12, to: date)!
-            add(mood: .missing, forDate: adjustedDate, entryType: .filledInMissing)
+            let entry = MoodEntryModel(
+                forDate: adjustedDate,
+                mood: .missing,
+                entryType: .filledInMissing
+            )
+            modelContext.insert(entry)
         }
 
-        if !missing.isEmpty {
-            EventLogger.log(event: "filled_in_missing_entries", withData: ["count": missing.count])
-        }
+        // Single save and listener notification at the end
+        saveAndRunDataListeners()
+        EventLogger.log(event: "filled_in_missing_entries", withData: ["count": missing.count])
     }
 
     func fixWrongWeekdays() {