fix(electrobun): clear min-size before each resize drag (enables shrink)

WebKitWebView re-propagates content size as minimum on every layout cycle,
overriding the one-time init fix. Now clearMinSizeTree() runs right before
each gtk_window_begin_resize_drag call, allowing resize-in (shrink).

Also removed red debug background from resize handles.

ui-electrobun/src/bun/gtk-window.ts

@@ -155,9 +155,44 @@ export function ensureResizable(windowPtr: number | bigint): boolean {
   }
 }
 
+/**
+ * Clear min-size constraints on the widget tree right before resize.
+ * WebKitWebView re-propagates content size as minimum on every layout cycle,
+ * so we must clear it each time — not just at init.
+ */
+function clearMinSizeTree(lib: NonNullable<typeof gtk3>, windowPtr: any) {
+  function walk(widget: any, depth: number) {
+    if (!widget || depth > 10) return;
+    lib.symbols.gtk_widget_set_size_request(widget, -1, -1);
+    try {
+      const child = lib.symbols.gtk_bin_get_child(widget);
+      if (child) walk(child, depth + 1);
+    } catch { /* not a GtkBin */ }
+    try {
+      const list = lib.symbols.gtk_container_get_children(widget);
+      if (list) {
+        const len = lib.symbols.g_list_length(list);
+        for (let i = 0; i < len && i < 20; i++) {
+          const child = lib.symbols.g_list_nth_data(list, i);
+          if (child) walk(child, depth + 1);
+        }
+        lib.symbols.g_list_free(list);
+      }
+    } catch { /* not a GtkContainer */ }
+  }
+  walk(windowPtr, 0);
+  // Re-apply geometry hints with small minimum
+  try {
+    const buf = new ArrayBuffer(72);
+    const view = new Int32Array(buf);
+    view[0] = 400; view[1] = 300; view[2] = 32767; view[3] = 32767;
+    lib.symbols.gtk_window_set_geometry_hints(windowPtr, null, ptr(buf) as any, 2 | 4);
+  } catch { /* ignore */ }
+}
+
 /**
  * Delegate resize to the window manager.
- * The WM handles cursor, animation, constraints — zero CPU from us.
+ * Clears min-size constraints first so resize-in (shrink) works.
  */
 export function beginResizeDrag(
   windowPtr: number | bigint,
@@ -169,6 +204,8 @@ export function beginResizeDrag(
   const lib = getGtk();
   if (!lib) return false;
   try {
+    // Clear min-size RIGHT BEFORE resize so shrinking is allowed
+    clearMinSizeTree(lib, windowPtr as any);
     lib.symbols.gtk_window_begin_resize_drag(
       windowPtr as any,
       edge,

ui-electrobun/src/mainview/App.svelte

@@ -619,7 +619,7 @@
   }
 
   /* ── Resize handles — 6px edges, 12px corners, fixed on viewport ── */
-  .rz { position: fixed; z-index: 9999; background: rgba(255,0,0,0.15); }
+  .rz { position: fixed; z-index: 9999; }
   .rz-n  { top: 0; left: 12px; right: 12px; height: 6px; cursor: n-resize; }
   .rz-s  { bottom: 0; left: 12px; right: 12px; height: 6px; cursor: s-resize; }
   .rz-e  { right: 0; top: 12px; bottom: 12px; width: 6px; cursor: e-resize; }