Split Android storage paths from legacy fallback

docs/modernization/roadmap.md

@@ -70,6 +70,16 @@ What is already real:
 - `pp_app_core`
 
 Latest slice:
+- `src/platform_legacy/legacy_platform_services.cpp` now reads Android storage
+  paths from Android-owned retained state instead of the shared legacy
+  storage-path singleton.
+- `src/legacy_app_startup_services.cpp` and `android/src/cpp/main.cpp` now
+  update Android-owned retained storage paths instead of the shared legacy
+  storage-path singleton.
+- `src/app_events.cpp`, `linux/src/main.cpp`, and
+  `src/platform_legacy/legacy_platform_state.*` now route the Linux FPS-title
+  callback through a narrow legacy GLFW title helper instead of reaching into
+  retained GLFW window state from `App::set_platform_services(...)`.
 - `src/platform_apple/apple_platform_state.cpp` no longer reads Apple storage
   paths from `pp::platform::legacy::active_legacy_storage_paths()`;
   Apple-owned retained state now carries that path bundle.

docs/modernization/tasks.md

@@ -78,6 +78,15 @@ Completed, blocked, and superseded task history moved to
   the queue is now ordered by code movement instead.
 
 Current slice:
+- `src/platform_legacy/legacy_platform_services.cpp` plus
+  `src/platform_legacy/legacy_platform_state.*` now give Android its own
+  retained storage-path surface instead of reading the shared legacy singleton.
+- `src/legacy_app_startup_services.cpp` and `android/src/cpp/main.cpp` now
+  write Android-owned retained storage paths.
+- `src/app_events.cpp`, `linux/src/main.cpp`, and
+  `src/platform_legacy/legacy_platform_state.*` now use a narrow GLFW title
+  helper for Linux FPS-title updates instead of direct retained-window access
+  in the app event layer.
 - `src/platform_apple/apple_platform_state.cpp` now reads Apple storage paths
   from Apple-owned retained state rather than the shared legacy storage-path
   singleton.