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/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
     }