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/AppDelegate.swift

@@ -28,8 +28,6 @@ class AppDelegate: NSObject, UIApplicationDelegate {
         UITabBar.appearance().standardAppearance = appearance
         UITabBar.appearance().scrollEdgeAppearance = appearance
 
-        EventLogger.log(event: "app_launced")
-
         return true
     }