fix(app): stabilize native terminal rendering

Scale custom glyph paths in measured cell coordinates so box-drawing runs fill their cells on Android. Debounce daemon resize claims at the terminal pane boundary so keyboard layout animation sends only the settled dimensions.

packages/app/src/terminal/native-renderer/terminal-grid-metrics.test.ts

@@ -1,12 +1,23 @@
 import { describe, expect, it } from "vitest";
 
 import {
+  resolveTerminalCustomGlyphCellTransform,
   resolveTerminalGridMetricsMeasurement,
   resolveMeasuredTerminalCellMetrics,
   resolveTerminalCursorOffset,
 } from "./terminal-grid-metrics";
 
 describe("native terminal grid metrics", () => {
+  it("places each normalized custom glyph in run viewport coordinates", () => {
+    expect(
+      resolveTerminalCustomGlyphCellTransform({
+        cellOffset: 57,
+        cellWidth: 7.4,
+        cellHeight: 16.2,
+      }),
+    ).toBe("matrix(7.4 0 0 16.2 421.8 0)");
+  });
+
   it("preserves fractional measured cell width for horizontal layout", () => {
     expect(
       resolveMeasuredTerminalCellMetrics({

packages/app/src/terminal/native-renderer/terminal-grid-metrics.ts

@@ -21,6 +21,19 @@ export interface TerminalCursorOffset {
   y: number;
 }
 
+export interface TerminalCustomGlyphCellTransformInput {
+  cellOffset: number;
+  cellWidth: number;
+  cellHeight: number;
+}
+
+export function resolveTerminalCustomGlyphCellTransform(
+  input: TerminalCustomGlyphCellTransformInput,
+): string {
+  const translateX = input.cellOffset * input.cellWidth;
+  return `matrix(${input.cellWidth} 0 0 ${input.cellHeight} ${translateX} 0)`;
+}
+
 export function resolveMeasuredTerminalCellMetrics(
   input: TerminalGridCellMetricsInput,
 ): TerminalGridCellMetrics {

packages/app/src/terminal/native-renderer/terminal-grid-view.native.tsx

@@ -22,6 +22,7 @@ import { resolveNativeTerminalFontFamily } from "./font.native";
 import type { TerminalViewportState } from "./headless-terminal-state";
 import {
   resolveMeasuredTerminalCellMetrics,
+  resolveTerminalCustomGlyphCellTransform,
   resolveTerminalGridMetricsMeasurement,
   resolveTerminalCursorOffset,
   type TerminalGridCellMetrics,
@@ -192,7 +193,7 @@ function TerminalGridCustomGlyphRun({
         pointerEvents="none"
         preserveAspectRatio="none"
         style={styles.customGlyphSvg}
-        viewBox={`0 0 ${run.cellCount} 1`}
+        viewBox={`0 0 ${run.cellCount * cellWidth} ${cellHeight}`}
         width={run.cellCount * cellWidth}
       >
         <G fill="none" stroke={run.foregroundColor}>
@@ -204,7 +205,11 @@ function TerminalGridCustomGlyphRun({
                 strokeLinecap="butt"
                 strokeLinejoin="miter"
                 strokeWidth={cell.glyph.strokeWidth}
-                transform={`translate(${cell.offset} 0)`}
+                transform={resolveTerminalCustomGlyphCellTransform({
+                  cellOffset: cell.offset,
+                  cellWidth,
+                  cellHeight,
+                })}
                 vectorEffect="non-scaling-stroke"
               />
             ) : null,