Route canvas keyboard claims through text and gesture boundaries

tests/headless/input-router.test.mjs

@@ -0,0 +1,4 @@
+import {test} from 'node:test';import assert from 'node:assert/strict';
+import {routeCanvasKey} from '../../src/lib/canvas-bindings/input-router.ts';
+test('text, IME, overlays and already consumed input never execute document shortcuts',()=>{for(const flags of [{textEditing:true},{composing:true},{overlay:true},{defaultPrevented:true}]){let calls=0;const result=routeCanvasKey({key:'Backspace',...flags},{gesture:()=>{calls++;return true;},shortcut:()=>{calls++;return true;}});assert.equal(calls,0);assert.ok(['text','overlay','unclaimed'].includes(result));}});
+test('gesture then tool then shortcut claim once; declining handlers fall through',()=>{for(const winner of ['gesture','tool','shortcut']){const calls=[];const handlers=Object.fromEntries(['gesture','tool','shortcut'].map(layer=>[layer,()=>{calls.push(layer);return layer===winner;}]));assert.equal(routeCanvasKey({key:'Escape'},handlers),winner);assert.deepEqual(calls,['gesture','tool','shortcut'].slice(0,['gesture','tool','shortcut'].indexOf(winner)+1));}assert.equal(routeCanvasKey({key:'x'},{}),'unclaimed');});

tests/headless/renderer.integration.mjs

@@ -161,6 +161,9 @@ try {
   assert.equal(calls.some(call => call.path.endsWith('/canvas')), false, 'canonical project read the legacy snapshot');
   assert.equal(await evaluate('!!document.querySelector("[aria-label=画布快捷操作]") && !document.querySelector("[aria-label=展开侧边栏]")'), true);
   const click = label => evaluate(`document.querySelector('[aria-label=${JSON.stringify(label)}]').click()`);
+  assert.deepEqual(await evaluate(`(()=>{const canvas=document.querySelector('[data-headless-canvas]');const fire=(key,options={})=>{const e=new KeyboardEvent('keydown',{key,bubbles:true,cancelable:true,...options});canvas.dispatchEvent(e);return e.defaultPrevented;};return [fire('h',{ctrlKey:true}),fire('v',{metaKey:true}),fire('h',{isComposing:true}),fire('F9'),fire('h'),fire('v')];})()`),[false,false,false,false,true,true]);
+  console.log('PASS canvas keyboard routing leaves modifiers, IME and unknown keys unclaimed and consumes plain tool shortcuts');
+
   await click('添加文本卡片'); await until('document.querySelectorAll(".react-flow__node").length === 3', 'create did not render');
   for (let i = 0; i < 100 && documents.get(root).elements.size !== 4; i++) await pause(20);
   assert.equal(documents.get(root).elements.size, 4);