port: complete 100% logic layer, eliminate pending dir, and unify client_main on port route

- Completed batch 4-f (Messenger, Guild, GuildMark), 4-g (PythonSystem, systemSetting), 4-h (PythonSoundManagerModule, MilesLib CSoundManager)
- Ported UserInterface/Locale.cpp, EterLocale/Japanese.cpp, EterLib/PathStack, EterLib/NetDatagram* UDP suite
- Modularized PythonApplication into Camera and Event handlers aligning with 40250 signatures
- Completely removed extension/src/platform/pending/ directory
- Logic layer reached 100.0% completion (3338/3338 functions, 0 TODO, 0 DIVERGENT) with empty port-map queue
- Removed legacy AppFlow route and fallback from project/client_main.gd, switching main loop unconditionally to native port route
- Verified 15/15 port.login_flow integration steps and 19/19 port_gate suites passing

audit/port-map/UserInterface/PythonApplicationProcedure.cpp.json

@@ -0,0 +1,28 @@
+{
+  "reference": "UserInterface/PythonApplicationProcedure.cpp",
+  "reference_sha256": "0ae949e664be6289494e27b557cadba5a48c34a73ebfc8e7b029bfdb82930a68",
+  "priority": "P4",
+  "contracts": [],
+  "functions": {
+    "CPythonApplication::SafeSetCapture": {
+      "status": "N_A",
+      "note": "Win32 HWND mouse capture; host engine manages input focus and mouse capture"
+    },
+    "CPythonApplication::SafeReleaseCapture": {
+      "status": "N_A",
+      "note": "Win32 HWND mouse release; host engine manages input focus and mouse capture"
+    },
+    "CPythonApplication::__SetFullScreenWindow": {
+      "status": "N_A",
+      "note": "Win32 ChangeDisplaySettings; host engine DisplayServer manages fullscreen modes"
+    },
+    "CPythonApplication::__MinimizeFullScreenWindow": {
+      "status": "N_A",
+      "note": "Win32 window minimize; host engine manages window state"
+    },
+    "CPythonApplication::WindowProcedure": {
+      "status": "N_A",
+      "note": "Win32 window message procedure; input and window events are forwarded via PythonBoot::UI*"
+    }
+  }
+}