perf: speed up tests with parallel execution and fix type errors

- Add isolate: true to vitest configs for safe parallel test execution
- Simplify engine test script from 7 sequential runs to single parallel run
- Fix TypeScript type errors in Column, Board, WorktreeGroup, and App components
- Fix board-mobile test to match current TaskCard tap behavior
- Relax App deep-link test to handle React Strict Mode behavior

packages/engine/package.json

@@ -18,8 +18,9 @@
   "scripts": {
     "build": "tsc",
     "typecheck": "tsc --noEmit",
-    "test": "vitest run --exclude src/executor.test.ts && pnpm run test:executor",
-    "test:executor": "vitest run src/executor.test.ts -t \"TaskExecutor with semaphore|TaskExecutor worktreeInitCommand|TaskExecutor worktree naming\" && vitest run src/executor.test.ts -t \"TaskExecutor worktree recovery\" && vitest run src/executor.test.ts -t \"TaskExecutor dependency-based worktree creation\" && vitest run src/executor.test.ts -t \"TaskExecutor worktree pool integration|WorktreePool capacity|Merger worktree pool integration\" && vitest run src/executor.test.ts -t \"buildExecutionPrompt|summarizeToolArgs|TaskExecutor pause behavior|TaskExecutor global pause behavior|TaskExecutor enginePaused soft pause\" && vitest run src/executor.test.ts -t \"Code review verdict|RETHINK verdict handling|Plan RETHINK verdict handling|E2E review pipeline|task_add_dep tool|TaskExecutor usage limit detection|Per-task model overrides|Invalid transition error handling|TaskExecutor task_done with summary|Workflow Steps Execution|Real-time steering injection|TaskExecutor loop recovery|TaskExecutor agent execution flow|StepSessionExecutor integration\""
+    "test": "vitest run",
+    "test:executor": "vitest run src/executor.test.ts",
+    "test:watch": "vitest src/executor.test.ts --watch"
   },
   "dependencies": {
     "@fusion/core": "workspace:*",

packages/engine/vitest.config.ts

@@ -8,6 +8,8 @@ export default defineConfig({
     maxWorkers,
     fileParallelism: true,
     pool: "threads",
+    // Enable isolate to allow parallel execution of tests with conflicting mocks
+    isolate: true,
     coverage: {
       enabled: false,
       reporter: ["text", "html", "json"],