[feat] 15-G convert to mesh + quad selection, and the three mesh-edit defects it surfaced

src/components/menu/MeshEditPopup.svelte

@@ -82,6 +82,12 @@
 	];
 
 	const GRANULARITIES = [
+		{
+			value: 'quad',
+			label: 'Quad',
+			title:
+				'Pick the quad under the cursor — the two triangles that form it (a 3-sided face picks alone)'
+		},
 		{ value: 'face', label: 'Face', title: 'Pick the whole coplanar face' },
 		{ value: 'triangle', label: 'Tri', title: 'Pick the single triangle under the cursor' },
 		{

src/components/play/VREditMenu.svelte

@@ -17,6 +17,16 @@
 	// Control meshes stay named vredit-<full action> for the vrControls raycast;
 	// the 111 grab/persist applies (id editmenu).
 
+	// 15-G: one label map instead of a nested ternary — that ternary predated
+	// 'object' and would have shown BOTH 'quad' and 'object' as "Triangle"
+	const GRAN_LABELS: Record<string, string> = {
+		quad: 'Quad',
+		face: 'Face',
+		triangle: 'Triangle',
+		shell: 'Shell',
+		object: 'Object'
+	}
+
 	const { renderer } = useThrelte()
 
 	const WIDTH = 0.22
@@ -48,7 +58,7 @@
 			// 212: granularity + multi toggles above the ops
 			const nSel = $faceEditSelectedTris.length
 			list.push(
-				{ action: 'edit:granularity', label: `Select: ${$faceEditGranularity === 'shell' ? 'Shell' : $faceEditGranularity === 'face' ? 'Face' : 'Triangle'}`, active: $faceEditGranularity !== 'face' },
+				{ action: 'edit:granularity', label: `Select: ${GRAN_LABELS[$faceEditGranularity] ?? 'Quad'}`, active: $faceEditGranularity !== 'quad' },
 				{ action: 'edit:multi', label: `Multi: ${$faceEditMulti ? 'On' : 'Off'}${$faceEditMulti && nSel ? ` (${nSel})` : ''}`, active: $faceEditMulti },
 				{ action: 'face:extrude', label: 'Extrude', active: op === 'extrude' },
 				{ action: 'face:inset', label: 'Inset', active: op === 'inset' },

src/components/ui/Icon.svelte

@@ -10,6 +10,7 @@
 		Boxes,
 		Brush,
 		Camera,
+		Combine,
 		Copy,
 		Eye,
 		FileText,
@@ -51,6 +52,7 @@
 		boxes: Boxes,
 		brush: Brush,
 		camera: Camera,
+		combine: Combine,
 		copy: Copy,
 		eye: Eye,
 		'file-text': FileText,