Add iPad support, auto-pinning, and comprehensive logging

- Adaptive iPhone/iPad layout with NavigationSplitView sidebar
- Auto-detect SSL-pinned domains, fall back to passthrough
- Certificate install via local HTTP server (Safari profile flow)
- App Group-backed CA, per-domain leaf cert LRU cache
- DB-backed config repository, Darwin notification throttling
- Rules engine, breakpoint rules, pinned domain tracking
- os.Logger instrumentation across tunnel/proxy/mitm/capture/cert/rules/db/ipc/ui
- Fix dyld framework embed, race conditions, thread safety

.gitignore

@@ -1,5 +1,10 @@
 .DS_Store
 *.xcuserdata
+**/xcuserdata/
 DerivedData/
 .build/
+build/
 screens/
+*.xcuserstate
+ProxyApp.xcodeproj/project.xcworkspace/xcuserdata/
+ProxyApp.xcodeproj/xcuserdata/