Fix memory leaks and add debug tools, remove ControlCenterTip

Memory optimization:
- Add onDisappear cleanup for repeatForever animations in LockScreenView
- Add onDisappear cleanup for animations in FeelsSubscriptionStoreView
- Add onDisappear cleanup in AddMoodHeaderView and PaywallPreviewSettingsView

Debug improvements:
- Add test data and clear data buttons to Settings (debug builds only)

TipKit changes:
- Remove ControlCenterTip (unused)
- Add TipKit-Tips.md documentation

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

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

Shared/Views/SettingsView/SettingsView.swift

@@ -55,6 +55,8 @@ struct SettingsContentView: View {
                 trialDateButton
                 animationLabButton
                 paywallPreviewButton
+                addTestDataButton
+                clearDataButton
                 #endif
 
                 Spacer()
@@ -159,7 +161,6 @@ struct SettingsContentView: View {
         }
         .padding(.top, 20)
         .padding(.horizontal, 4)
-        .controlCenterTip()
     }
 
     private var legalSectionHeader: some View {
@@ -331,6 +332,66 @@ struct SettingsContentView: View {
             }
         }
     }
+
+    private var addTestDataButton: some View {
+        ZStack {
+            theme.currentTheme.secondaryBGColor
+            Button {
+                DataController.shared.populateTestData()
+            } label: {
+                HStack(spacing: 12) {
+                    Image(systemName: "plus.square.on.square")
+                        .font(.title2)
+                        .foregroundColor(.green)
+                        .frame(width: 32)
+
+                    VStack(alignment: .leading, spacing: 2) {
+                        Text("Add Test Data")
+                            .foregroundColor(textColor)
+
+                        Text("Populate with sample mood entries")
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+
+                    Spacer()
+                }
+                .padding()
+            }
+        }
+        .fixedSize(horizontal: false, vertical: true)
+        .cornerRadius(Constants.viewsCornerRaidus, corners: [.topLeft, .topRight, .bottomLeft, .bottomRight])
+    }
+
+    private var clearDataButton: some View {
+        ZStack {
+            theme.currentTheme.secondaryBGColor
+            Button {
+                DataController.shared.clearDB()
+            } label: {
+                HStack(spacing: 12) {
+                    Image(systemName: "trash")
+                        .font(.title2)
+                        .foregroundColor(.red)
+                        .frame(width: 32)
+
+                    VStack(alignment: .leading, spacing: 2) {
+                        Text("Clear All Data")
+                            .foregroundColor(textColor)
+
+                        Text("Delete all mood entries")
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+
+                    Spacer()
+                }
+                .padding()
+            }
+        }
+        .fixedSize(horizontal: false, vertical: true)
+        .cornerRadius(Constants.viewsCornerRaidus, corners: [.topLeft, .topRight, .bottomLeft, .bottomRight])
+    }
     #endif
 
     // MARK: - Privacy Lock Toggle