Q-W2v: split VST god-modules — editor 8 face-axis TUs (+pure layout hoist), processor 3 TUs, component_state_io codec split (extension drops the voice engine), zone_params.h, core/wire putLE; formats frozen, 61/61 green

src/core/instrument/ui/browser_scroll.h

@@ -104,4 +104,21 @@ bool nameMatchesQuery(const std::string& name, const std::string& query);
 std::vector<int> filterNameIndices(const std::vector<std::string>& names,
                                    const std::string& query);
 
+// --- The Browse-modal (S-VIEW-5) top-level regions (Q-W2v hoist, T2-06) -------
+//
+// A title band with a Back button, the search box, the browser sub-area (tabs + card
+// grid — layoutBrowser's origin), and a footer with Cancel / Load-confirm. The picker
+// covers the full window (F3: full-window overlay). Draw + hit-test both derive from
+// this single layout so they never drift. Homed here (not editor_geometry) because the
+// search-box height feeds it — browser_scroll already owns the search/scroll geometry.
+struct BrowseModal {
+    Rect title;
+    Rect back;      // the "Back" title-band button
+    Rect search;    // the type-to-filter box (absolute)
+    Rect content;   // the browser sub-area (tabs + grid) — layoutBrowser's origin
+    Rect cancel;    // footer Cancel
+    Rect confirm;   // footer Load (confirm)
+};
+BrowseModal computeBrowseModal(int w, int h);
+
 }  // namespace reasampler::instrument::ui