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/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
         }
     }