Split mac cursor visibility

docs/modernization/debt.md

@@ -55,6 +55,12 @@ agent or engineer to remove them without reconstructing context from chat.
 - 2026-06-13: `PLT-005` was narrowed again. Linux rendered-frame title updates
   now route through `src/platform_linux/linux_platform_services.*`; the legacy
   platform adapter still owns the surrounding cross-platform dispatch shell.
+- 2026-06-13: `PLT-006` was narrowed again. macOS cursor visibility now routes
+  through `src/platform_apple/apple_platform_services.*`; the legacy platform
+  adapter still owns the surrounding cross-platform dispatch shell.
+- 2026-06-13: `PLT-006` was narrowed again. macOS cursor visibility now routes
+  through the Apple service boundary instead of the catch-all legacy adapter;
+  the Apple path still owns the OS-specific cursor toggle.
 - 2026-06-13: `DEBT-0036` was narrowed again. `NodeStrokePreview::draw_stroke_immediate()`
   now routes final composite execution and preview copy-back through a retained
   local wrapper, leaving the call site with only sequence wiring.

docs/modernization/tasks.md

@@ -1328,6 +1328,40 @@ Completed Task Log:
 | --- | --- | ---: | --- | --- |
 | 2026-06-13 | PLT-005 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `1d50bcc7` |
 
+### PLT-006 - Split Mac Cursor Visibility From Legacy Platform Adapter
+
+Status: Done
+Score: +1 platform alignment and package parity
+Debt: `DEBT-0015`, `DEBT-0017`
+Scope: `src/platform_legacy/legacy_platform_services.cpp`,
+`src/platform_apple/apple_platform_services.*`
+
+Goal:
+
+Move macOS cursor visibility handling out of the catch-all legacy platform
+adapter into the Apple platform service boundary. Preserve cursor visibility
+behavior and keep non-macOS behavior unchanged.
+
+Done Checks:
+
+- `src/platform_legacy/legacy_platform_services.cpp` no longer owns the macOS
+  cursor visibility branch.
+- macOS cursor visibility still dispatches through the Apple service path.
+- The debt log records the reduced macOS platform tail.
+
+Validation:
+
+```powershell
+ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
+cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests
+```
+
+Completed Task Log:
+
+| Date | Task | Score | Validation | Commit |
+| --- | --- | ---: | --- | --- |
+| 2026-06-13 | PLT-006 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `pending` |
+
 ### STR-010 - Extract Remaining Draw Merge Composite Orchestration
 
 Status: Done

src/platform_apple/apple_platform_services.cpp

@@ -160,4 +160,13 @@ void AppleDocumentPlatformServices::share_file(std::string_view path) const
 #endif
 }
 
+void AppleDocumentPlatformServices::set_cursor_visible(bool visible) const
+{
+#if defined(__OSX__)
+    [App::I->osx_view show_cursor:visible];
+#else
+    (void)visible;
+#endif
+}
+
 }

src/platform_apple/apple_platform_services.h

@@ -37,6 +37,7 @@ public:
     [[nodiscard]] std::string format_working_directory_path(std::string_view path) const;
     void display_file(std::string_view path) const;
     void share_file(std::string_view path) const;
+    void set_cursor_visible(bool visible) const;
 
 private:
     PlatformFamily family_;

src/platform_legacy/legacy_platform_services.cpp

@@ -276,11 +276,7 @@ public:
 
     void set_cursor_visible(bool visible) override
     {
-#ifdef __OSX__
+        active_apple_document_platform_services().set_cursor_visible(visible);
-        [App::I->osx_view show_cursor:visible];
-#else
-        (void)visible;
-#endif
     }
 
     void set_virtual_keyboard_visible(bool visible) override