diff --git a/docs/modernization/build-inventory.md b/docs/modernization/build-inventory.md
index 90e8103..5e0756c 100644
--- a/docs/modernization/build-inventory.md
+++ b/docs/modernization/build-inventory.md
@@ -543,8 +543,8 @@ Known local toolchain state:
   render-target binding hooks, render platform hint hooks, render-capture frame
   hooks, render debug callback hooks, per-frame platform hooks, picker
   callbacks, recording cleanup, exported-image publishing, persistent storage
-  flushing, live asset/layout reload policy, diagnostic stacktrace/crash hooks,
-  prepared-file save/download handoff;
+  flushing, document browse roots, live asset/layout reload policy, diagnostic
+  stacktrace/crash hooks, prepared-file save/download handoff;
   Windows
   live app execution now uses injected
   `WindowsPlatformServices` from
diff --git a/docs/modernization/debt.md b/docs/modernization/debt.md
index 8def995..467f5ea 100644
--- a/docs/modernization/debt.md
+++ b/docs/modernization/debt.md
@@ -68,6 +68,7 @@ agent or engineer to remove them without reconstructing context from chat.
 | DEBT-0048 | Open | Modernization | ABR/PPBR brush package import execution now consumes pure `pp_app_core` through document-open confirmation callbacks, `pano_cli plan-brush-package-import`, `BrushPackageImportServices`, and `src/legacy_brush_package_import_services.*`; imported brush tip/pattern target paths now consume `pp_assets::brush_package`, but the bridge still launches detached legacy `NodePanelBrushPreset::import_abr`/`import_ppbr` worker threads and depends on the legacy preset panel as the importer/storage owner | Preserve current brush import behavior while brush package parsing, preset storage, progress/error reporting, and UI refresh move toward asset/paint/UI services | `pp_assets_brush_package_tests`; `pp_app_core_brush_package_import_tests`; `pano_cli plan-brush-package-import --kind ppbr --path D:/Paint/Brushes/clouds.ppbr`; `pano_cli plan-brush-package-import --kind abr --path D:/Paint/Brushes/clouds.abr`; `pano_cli plan-brush-package-import --kind ppbr`; `ctest --preset desktop-fast --build-config Debug`; `cmake --build --preset windows-msvc-default --config Debug --target PanoPainter` | ABR/PPBR parsing, preset creation/storage, import threading/progress, duplicate asset policy, and UI refresh are owned by injected brush asset/paint/UI services with document-open callbacks only confirming user intent |
 | DEBT-0049 | Open | Modernization | `pp_assets::validate_ppbr_header` intentionally preserves the legacy PPBR version check from `NodePanelBrushPreset::import_ppbr`, which accepts files when either major is `0` or minor is `1` instead of requiring exactly version `0.1` | Avoid rejecting existing brush packages before compatibility fixtures prove the stricter rule is safe | `pp_assets_brush_package_tests`; `pano_cli plan-brush-package-export --path D:/Paint/clouds.ppbr`; `ctest --preset desktop-fast --build-config Debug`; `cmake --build --preset windows-msvc-default --config Debug --target PanoPainter` | Add PPBR compatibility fixtures for accepted/rejected historical package versions, then require canonical `0.1` or an explicit supported-version matrix and update live import accordingly |
 | DEBT-0050 | Open | Modernization | iOS exported-image photo-library publishing and WebGL persistent-storage flushing now dispatch through `PlatformServices`, but non-Windows execution still lives in `src/platform_legacy/legacy_platform_services.*` and forwards to retained `save_image_library`/`webgl_sync` bridges | Preserve current iOS/Web export and save behavior while the Apple/Web platform shells are extracted incrementally | `pp_platform_api_tests`; `ctest --preset desktop-fast --build-config Debug`; platform package smoke once Apple/Web root builds exist | Exported-image publishing and persistent-storage flushing are owned by injected Apple/Web `pp_platform_*` services with no legacy adapter branch |
+| DEBT-0051 | Open | Modernization | Document browser search roots now dispatch through `PlatformServices`, but iOS `Inbox` inclusion still lives in `src/platform_legacy/legacy_platform_services.*` | Preserve current iOS document import/browse behavior while Apple platform shells are extracted incrementally | `pp_platform_api_tests`; `ctest --preset desktop-fast --build-config Debug`; Apple package smoke once root Apple builds exist | Document browse roots are owned by injected Apple and desktop `pp_platform_*` services with no legacy adapter branch |
 
 ## Closed Debt
 
diff --git a/docs/modernization/roadmap.md b/docs/modernization/roadmap.md
index e8df039..1ab028d 100644
--- a/docs/modernization/roadmap.md
+++ b/docs/modernization/roadmap.md
@@ -643,6 +643,9 @@ Canvas image export publishing and explicit persistent-storage flushes now
 dispatch through `PlatformServices` too, preserving iOS photo-library export
 publication and WebGL filesystem sync behavior in the legacy adapter while
 removing those direct platform calls from `Canvas` and brush preset storage.
+Document-browser search root selection now dispatches through
+`PlatformServices`, preserving the iOS `Inbox` root in the legacy adapter while
+removing the iOS-specific branch from `App::dialog_browse`.
 `App::show_cursor`, `App::hide_cursor`, `App::showKeyboard`, and
 `App::hideKeyboard` now dispatch through the active service without local
 platform guards; unsupported platforms rely on their service no-op behavior.
@@ -1684,7 +1687,8 @@ Results:
   lifecycle dispatch, render-target binding dispatch, render platform hint
   dispatch, render debug callback dispatch, render-capture frame hook dispatch,
   recording cleanup dispatch, exported-image publish dispatch, persistent
-  storage flush dispatch, live asset/layout reload policy dispatch,
+  storage flush dispatch, document browse-root dispatch,
+  live asset/layout reload policy dispatch,
   diagnostic hook dispatch, per-frame platform hook dispatch, picker callback
   dispatch, and prepared-file save/download callback dispatch. The live Windows
   app now
diff --git a/src/app.h b/src/app.h
index bef9f39..236692e 100644
--- a/src/app.h
+++ b/src/app.h
@@ -206,6 +206,7 @@ public:
     void clear_platform_recorded_files(std::string path);
     void publish_exported_image(std::string path);
     void flush_platform_storage();
+    [[nodiscard]] std::vector<std::string> document_browse_roots() const;
     [[nodiscard]] bool platform_enables_live_asset_reloading();
     void update_platform_frame(float delta_time_seconds);
     void report_rendered_frames(int frames);
diff --git a/src/app_dialogs.cpp b/src/app_dialogs.cpp
index c3839ef..18c9f15 100644
--- a/src/app_dialogs.cpp
+++ b/src/app_dialogs.cpp
@@ -238,11 +238,7 @@ void App::dialog_browse()
         // load thumbnail test
         auto dialog = std::make_shared<NodeDialogBrowse>();
         dialog->set_manager(&layout);
-#ifdef __IOS__
-        dialog->search_paths = {work_path, data_path + "/Inbox"};
-#else
-        dialog->search_paths = {work_path};
-#endif
+        dialog->search_paths = document_browse_roots();
         dialog->init();
         dialog->create();
         dialog->loaded();
diff --git a/src/app_events.cpp b/src/app_events.cpp
index 205c770..e0f975c 100644
--- a/src/app_events.cpp
+++ b/src/app_events.cpp
@@ -287,6 +287,11 @@ void App::flush_platform_storage()
     active_platform_services().flush_persistent_storage();
 }
 
+std::vector<std::string> App::document_browse_roots() const
+{
+    return active_platform_services().document_browse_roots(work_path, data_path);
+}
+
 bool App::platform_enables_live_asset_reloading()
 {
     return active_platform_services().enables_live_asset_reloading();
diff --git a/src/platform_api/platform_services.h b/src/platform_api/platform_services.h
index afb7fe5..079e6c5 100644
--- a/src/platform_api/platform_services.h
+++ b/src/platform_api/platform_services.h
@@ -43,6 +43,9 @@ public:
     virtual void clear_recorded_files(std::string_view recording_path) = 0;
     virtual void publish_exported_image(std::string_view path) = 0;
     virtual void flush_persistent_storage() = 0;
+    [[nodiscard]] virtual std::vector<std::string> document_browse_roots(
+        std::string_view work_path,
+        std::string_view data_path) = 0;
     [[nodiscard]] virtual bool enables_live_asset_reloading() = 0;
     virtual void update_platform_frame(float delta_time_seconds) = 0;
     virtual void report_rendered_frames(int frames) = 0;
diff --git a/src/platform_legacy/legacy_platform_services.cpp b/src/platform_legacy/legacy_platform_services.cpp
index 09afc9d..2dfef4e 100644
--- a/src/platform_legacy/legacy_platform_services.cpp
+++ b/src/platform_legacy/legacy_platform_services.cpp
@@ -298,6 +298,21 @@ public:
 #endif
     }
 
+    [[nodiscard]] std::vector<std::string> document_browse_roots(
+        std::string_view work_path,
+        std::string_view data_path) override
+    {
+#ifdef __IOS__
+        return {
+            std::string(work_path),
+            std::string(data_path) + "/Inbox",
+        };
+#else
+        (void)data_path;
+        return { std::string(work_path) };
+#endif
+    }
+
     [[nodiscard]] bool enables_live_asset_reloading() override
     {
 #if defined(__OSX__)
diff --git a/src/platform_windows/windows_platform_services.cpp b/src/platform_windows/windows_platform_services.cpp
index 415ef64..0859407 100644
--- a/src/platform_windows/windows_platform_services.cpp
+++ b/src/platform_windows/windows_platform_services.cpp
@@ -378,6 +378,14 @@ public:
     {
     }
 
+    [[nodiscard]] std::vector<std::string> document_browse_roots(
+        std::string_view work_path,
+        std::string_view data_path) override
+    {
+        (void)data_path;
+        return { std::string(work_path) };
+    }
+
     [[nodiscard]] bool enables_live_asset_reloading() override
     {
         return true;
diff --git a/tests/platform_api/platform_services_tests.cpp b/tests/platform_api/platform_services_tests.cpp
index 9d35ff1..ccea12b 100644
--- a/tests/platform_api/platform_services_tests.cpp
+++ b/tests/platform_api/platform_services_tests.cpp
@@ -134,6 +134,16 @@ public:
         ++persistent_storage_flushes;
     }
 
+    [[nodiscard]] std::vector<std::string> document_browse_roots(
+        std::string_view work_path,
+        std::string_view data_path) override
+    {
+        ++document_browse_root_requests;
+        browse_work_path.assign(work_path);
+        browse_data_path.assign(data_path);
+        return browse_roots;
+    }
+
     [[nodiscard]] bool enables_live_asset_reloading() override
     {
         ++live_asset_reload_policy_checks;
@@ -228,6 +238,7 @@ public:
     int recording_clears = 0;
     int exported_image_publishes = 0;
     int persistent_storage_flushes = 0;
+    int document_browse_root_requests = 0;
     int live_asset_reload_policy_checks = 0;
     int platform_frame_updates = 0;
     int frame_reports = 0;
@@ -252,6 +263,8 @@ public:
     std::string prepared_file_name;
     std::string cleared_recording_path;
     std::string exported_image_path;
+    std::string browse_work_path;
+    std::string browse_data_path;
     std::string picker_path = "D:/Paint/import.png";
     std::string save_path = "D:/Paint/export.ppi";
     std::string directory_path = "D:/Paint";
@@ -263,6 +276,10 @@ public:
     };
     std::vector<std::string> picked_file_types;
     std::vector<std::string> save_file_types;
+    std::vector<std::string> browse_roots = {
+        "D:/Paint/work",
+        "D:/Paint/Inbox",
+    };
 
 private:
     std::string clipboard_value_;
@@ -404,6 +421,21 @@ void platform_services_dispatch_exported_image_and_storage_flush(pp::tests::Harn
     PP_EXPECT(harness, fake.persistent_storage_flushes == 1);
 }
 
+void platform_services_dispatch_document_browse_roots(pp::tests::Harness& harness)
+{
+    FakePlatformServices fake("unused");
+    pp::platform::PlatformServices& services = fake;
+
+    const auto roots = services.document_browse_roots("D:/Paint/work", "D:/Paint");
+
+    PP_EXPECT(harness, fake.document_browse_root_requests == 1);
+    PP_EXPECT(harness, fake.browse_work_path == "D:/Paint/work");
+    PP_EXPECT(harness, fake.browse_data_path == "D:/Paint");
+    PP_EXPECT(harness, roots.size() == 2);
+    PP_EXPECT(harness, roots[0] == "D:/Paint/work");
+    PP_EXPECT(harness, roots[1] == "D:/Paint/Inbox");
+}
+
 void platform_services_dispatch_live_asset_reload_policy(pp::tests::Harness& harness)
 {
     FakePlatformServices fake("unused");
@@ -509,6 +541,7 @@ int main()
     harness.run("platform services dispatch render capture hooks", platform_services_dispatch_render_capture_hooks);
     harness.run("platform services dispatch recording cleanup", platform_services_dispatch_recording_cleanup);
     harness.run("platform services dispatch exported image and storage flush", platform_services_dispatch_exported_image_and_storage_flush);
+    harness.run("platform services dispatch document browse roots", platform_services_dispatch_document_browse_roots);
     harness.run("platform services dispatch live asset reload policy", platform_services_dispatch_live_asset_reload_policy);
     harness.run("platform services dispatch frame hooks", platform_services_dispatch_frame_hooks);
     harness.run("platform services dispatch file actions", platform_services_dispatch_file_actions);