Replace EventLogger with typed AnalyticsManager using PostHog

Complete analytics overhaul: delete EventLogger.swift, create Analytics.swift
with typed event enum (~45 events), screen tracking, super properties
(theme, icon pack, voting layout, etc.), session replay with kill switch,
autocapture, and network telemetry. Replace all 99 call sites across 38 files
with compiler-enforced typed events in object_action naming convention.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Shared/Services/BiometricAuthManager.swift

@@ -98,12 +98,12 @@ class BiometricAuthManager: ObservableObject {
 
             isUnlocked = success
             if success {
-                EventLogger.log(event: "biometric_unlock_success")
+                AnalyticsManager.shared.track(.biometricUnlockSuccess)
             }
             return success
         } catch {
             print("Authentication failed: \(error.localizedDescription)")
-            EventLogger.log(event: "biometric_unlock_failed", withData: ["error": error.localizedDescription])
+            AnalyticsManager.shared.track(.biometricUnlockFailed(error: error.localizedDescription))
 
             // If biometrics failed, try device passcode as fallback
             if canUseDevicePasscode && policy == .deviceOwnerAuthenticationWithBiometrics {
@@ -136,7 +136,7 @@ class BiometricAuthManager: ObservableObject {
     func lock() {
         guard isLockEnabled else { return }
         isUnlocked = false
-        EventLogger.log(event: "app_locked")
+        AnalyticsManager.shared.track(.appLocked)
     }
 
     func enableLock() async -> Bool {
@@ -159,7 +159,7 @@ class BiometricAuthManager: ObservableObject {
             if success {
                 isLockEnabled = true
                 isUnlocked = true
-                EventLogger.log(event: "privacy_lock_enabled")
+                AnalyticsManager.shared.track(.privacyLockEnabled)
             }
 
             return success
@@ -172,6 +172,6 @@ class BiometricAuthManager: ObservableObject {
     func disableLock() {
         isLockEnabled = false
         isUnlocked = true
-        EventLogger.log(event: "privacy_lock_disabled")
+        AnalyticsManager.shared.track(.privacyLockDisabled)
     }
 }

Shared/Services/ExportService.swift

@@ -45,6 +45,12 @@ class ExportService {
         .horrible: UIColor(red: 0.91, green: 0.30, blue: 0.24, alpha: 1.0)  // Red
     ]
 
+    private func trackDataExported(format: String, count: Int) {
+        Task { @MainActor in
+            AnalyticsManager.shared.track(.dataExported(format: format, count: count))
+        }
+    }
+
     // MARK: - CSV Export
 
     func generateCSV(entries: [MoodEntryModel]) -> String {
@@ -75,7 +81,7 @@ class ExportService {
 
         do {
             try csv.write(to: tempURL, atomically: true, encoding: .utf8)
-            EventLogger.log(event: "csv_exported", withData: ["count": entries.count])
+            trackDataExported(format: "csv", count: entries.count)
             return tempURL
         } catch {
             print("ExportService: Failed to write CSV: \(error)")
@@ -152,7 +158,7 @@ class ExportService {
             drawFooter(pageWidth: pageWidth, pageHeight: pageHeight, margin: margin, in: context)
         }
 
-        EventLogger.log(event: "pdf_exported", withData: ["count": entries.count])
+        trackDataExported(format: "pdf", count: entries.count)
         return data
     }
 

Shared/Services/HealthService.swift

@@ -79,11 +79,11 @@ class HealthService: ObservableObject {
             try await healthStore.requestAuthorization(toShare: [], read: readTypes)
             isAuthorized = true
             isEnabled = true
-            EventLogger.log(event: "healthkit_authorized")
+            AnalyticsManager.shared.track(.healthKitAuthorized)
             return true
         } catch {
             print("HealthService: Authorization failed: \(error.localizedDescription)")
-            EventLogger.log(event: "healthkit_auth_failed", withData: ["error": error.localizedDescription])
+            AnalyticsManager.shared.track(.healthKitAuthFailed(error: error.localizedDescription))
             return false
         }
     }

Shared/Services/PhotoManager.swift

@@ -95,7 +95,7 @@ class PhotoManager: ObservableObject {
             try? thumbnailData.write(to: thumbnailURL)
         }
 
-        EventLogger.log(event: "photo_saved")
+        AnalyticsManager.shared.track(.photoAdded)
         return photoID
     }
 
@@ -163,7 +163,7 @@ class PhotoManager: ObservableObject {
         }
 
         if success {
-            EventLogger.log(event: "photo_deleted")
+            AnalyticsManager.shared.track(.photoDeleted)
         }
 
         return success