fix(electrobun): set_size_request(1,1) not (-1,-1) + revert to begin_resize_drag

Codex review found: set_size_request(-1,-1) means "use preferred size"
which RE-ENABLES WebView content-based minimum. Using (1,1) FORCES a
1x1 minimum, actually overriding the preferred size.

Reverted to native begin_resize_drag (WM handles resize smoothly).
Fixed onResizeStart sync: e.stopPropagation() now runs BEFORE any async
work, preventing sidebar drag handler from intercepting.

Removed JS mousemove resize loop — native GTK resize is correct approach.

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

@@ -102,60 +102,9 @@ export function ensureResizable(windowPtr: number | bigint): boolean {
       const nowResizable = lib.symbols.gtk_window_get_resizable(windowPtr as any);
       console.log(`[gtk-window] After set_resizable(true): ${nowResizable}`);
     }
-    // Override minimum size on the entire widget tree.
+    // Force small min-size on entire widget tree (1×1 per widget, 400×300 via geometry hints)
-    // WebKitWebView requests min_size = content_size, which GTK propagates
+    console.log("[gtk-window] Forcing small min-size on widget tree");
-    // to WM_NORMAL_HINTS, blocking resize. Fix: set -1 (no minimum) recursively.
+    forceSmallMinSize(lib, windowPtr as any);
-    console.log("[gtk-window] Resetting minimum size constraints on widget tree");
-
-    function clearMinSize(widget: any, depth: number) {
-      if (!widget || depth > 10) return;
-      lib!.symbols.gtk_widget_set_size_request(widget, -1, -1);
-      // Try as GtkBin (single child)
-      try {
-        const child = lib!.symbols.gtk_bin_get_child(widget);
-        if (child) {
-          console.log(`[gtk-window]   ${"  ".repeat(depth)}child (bin)`);
-          clearMinSize(child, depth + 1);
-        }
-      } catch { /* not a GtkBin */ }
-      // Try as GtkContainer (multiple children)
-      try {
-        const list = lib!.symbols.gtk_container_get_children(widget);
-        if (list) {
-          const len = lib!.symbols.g_list_length(list);
-          console.log(`[gtk-window]   ${"  ".repeat(depth)}container (${len} children)`);
-          for (let i = 0; i < len && i < 20; i++) {
-            const child = lib!.symbols.g_list_nth_data(list, i);
-            if (child) clearMinSize(child, depth + 1);
-          }
-          lib!.symbols.g_list_free(list);
-        }
-      } catch { /* not a GtkContainer */ }
-    }
-    clearMinSize(windowPtr as any, 0);
-    // Set geometry hints with small minimum via GdkGeometry struct
-    // GdkGeometry: min_width(i32), min_height(i32), ... (rest are padding)
-    // GdkWindowHints: GDK_HINT_MIN_SIZE = 1<<1 = 2
-    try {
-      // Allocate GdkGeometry struct (18 ints = 72 bytes)
-      const buf = new ArrayBuffer(72);
-      const view = new Int32Array(buf);
-      view[0] = 400;   // min_width
-      view[1] = 300;   // min_height
-      view[2] = 32767; // max_width
-      view[3] = 32767; // max_height
-      const GDK_HINT_MIN_SIZE = 2;
-      const GDK_HINT_MAX_SIZE = 4;
-      lib.symbols.gtk_window_set_geometry_hints(
-        windowPtr as any,
-        null,              // widget = null → applies to window itself
-        ptr(buf) as any,   // GdkGeometry*
-        GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE,
-      );
-      console.log("[gtk-window] Set geometry hints: min=400×300 max=32767×32767");
-    } catch (err) {
-      console.error("[gtk-window] geometry hints failed:", err);
-    }
     return true;
   } catch (err) {
     console.error("[gtk-window] ensureResizable failed:", err);
@@ -168,10 +117,17 @@ export function ensureResizable(windowPtr: number | bigint): boolean {
  * 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) {
+/**
+ * Force small minimum size on the entire widget tree.
+ * Key insight (from Codex review): set_size_request(-1, -1) means "use preferred size"
+ * which RE-ENABLES the WebView's content-based minimum. Using set_size_request(1, 1)
+ * FORCES a 1×1 minimum, overriding the preferred size.
+ */
+function forceSmallMinSize(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);
+    // Force 1x1 minimum — NOT -1,-1 which means "use preferred size"
+    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);
@@ -189,7 +145,7 @@ function clearMinSizeTree(lib: NonNullable<typeof gtk3>, windowPtr: any) {
     } catch { /* not a GtkContainer */ }
   }
   walk(windowPtr, 0);
-  // Re-apply geometry hints with small minimum
+  // Set geometry hints: min=400×300 (our real minimum), max=32767×32767
   try {
     const buf = new ArrayBuffer(72);
     const view = new Int32Array(buf);
@@ -213,7 +169,7 @@ export function beginResizeDrag(
   if (!lib) return false;
   try {
     // Clear min-size RIGHT BEFORE resize so shrinking is allowed
-    clearMinSizeTree(lib, windowPtr as any);
+    forceSmallMinSize(lib, windowPtr as any);
     lib.symbols.gtk_window_begin_resize_drag(
       windowPtr as any,
       edge,
@@ -267,7 +223,7 @@ export function gtkSetFrame(
   if (!lib) return false;
   try {
     // Clear min-size on every frame update during resize
-    clearMinSizeTree(lib, windowPtr as any);
+    forceSmallMinSize(lib, windowPtr as any);
     lib.symbols.gtk_window_resize(windowPtr as any, Math.max(400, Math.round(width)), Math.max(300, Math.round(height)));
     lib.symbols.gtk_window_move(windowPtr as any, Math.round(x), Math.round(y));
     return true;

ui-electrobun/src/mainview/App.svelte

@@ -104,60 +104,18 @@
     e.preventDefault();
   }
 
-  // ── Window resize — JS-based with GTK min-size clear ────────
+  // ── Window resize — native GTK begin_resize_drag ────────
-  let resizeEdge: string | null = null;
+  function onResizeStart(e: MouseEvent, edge: string) {
-  let resizeStartX = 0;
+    // MUST stop propagation SYNCHRONOUSLY to prevent sidebar drag handler
-  let resizeStartY = 0;
-  let resizeFrame = { x: 0, y: 0, width: 0, height: 0 };
-
-  const CURSOR_MAP: Record<string, string> = {
-    n: 'n-resize', s: 's-resize', e: 'e-resize', w: 'w-resize',
-    ne: 'ne-resize', nw: 'nw-resize', se: 'se-resize', sw: 'sw-resize',
-  };
-
-  async function onResizeStart(e: MouseEvent, edge: string) {
-    // Clear min-size constraints first (enables shrink)
-    appRpc.request['window.clearMinSize']({}).catch(() => {});
-    // Capture current frame BEFORE starting resize
-    try {
-      const frame = await appRpc.request['window.getFrame']({});
-      resizeFrame = { x: frame.x, y: frame.y, width: frame.width, height: frame.height };
-    } catch {
-      // fallback — use defaults
-      resizeFrame = { x: 100, y: 100, width: 1400, height: 900 };
-    }
-    resizeEdge = edge;
-    resizeStartX = e.screenX;
-    resizeStartY = e.screenY;
-    // Lock cursor during resize
-    document.body.style.cursor = CURSOR_MAP[edge] || 'default';
-    document.body.style.userSelect = 'none';
     e.preventDefault();
     e.stopPropagation();
-  }
+    // Delegate to GTK window manager — handles cursor, animation, constraints
-
+    appRpc.request['window.beginResize']({
-  function onResizeMove(e: MouseEvent) {
+      edge,
-    if (!resizeEdge) return;
+      button: e.button + 1, // DOM: 0=left, GTK: 1=left
-    const dx = e.screenX - resizeStartX;
+      rootX: e.screenX,
-    const dy = e.screenY - resizeStartY;
+      rootY: e.screenY,
-    let { x, y, width, height } = resizeFrame;
+    }).catch(() => {});
-    const MIN_W = 400, MIN_H = 300;
-
-    if (resizeEdge.includes('e')) width = Math.max(MIN_W, width + dx);
-    if (resizeEdge.includes('w')) { const nw = Math.max(MIN_W, width - dx); x += width - nw; width = nw; }
-    if (resizeEdge.includes('s')) height = Math.max(MIN_H, height + dy);
-    if (resizeEdge.includes('n')) { const nh = Math.max(MIN_H, height - dy); y += height - nh; height = nh; }
-
-    // Use GTK FFI directly — bypasses Electrobun's setSize which respects WebView min-size
-    appRpc.request['window.gtkSetFrame']({ x: Math.round(x), y: Math.round(y), width: Math.round(width), height: Math.round(height) }).catch(() => {});
-  }
-
-  function onResizeEnd() {
-    if (!resizeEdge) return;
-    resizeEdge = null;
-    document.body.style.cursor = '';
-    document.body.style.userSelect = '';
-    saveWindowFrame();
   }
 
   // ── Window frame persistence (debounced 500ms) ──────────────
@@ -258,9 +216,7 @@
     setAgentToastFn(showToast);
     setupErrorBoundary();
 
-    // JS-based resize needs global mouse listeners
+    // Native GTK begin_resize_drag handles resize — no JS mousemove needed
-    document.addEventListener('mousemove', onResizeMove);
-    document.addEventListener('mouseup', onResizeEnd);
 
     // Blink + session timers — MUST be in onMount, NOT $effect
     // $effect interacts with reactive graph and causes cycles
@@ -356,8 +312,7 @@
       clearInterval(sessionId);
       document.removeEventListener("keydown", handleSearchShortcut);
       window.removeEventListener("palette-command", handlePaletteCommand);
-      document.removeEventListener('mousemove', onResizeMove);
+      // no resize listeners to clean up — native GTK handles it
-      document.removeEventListener('mouseup', onResizeEnd);
     };
   });
 </script>