fix: 排除破坏行框的组合字符

src/mosaic.test.ts

@@ -98,6 +98,18 @@ describe('generateMosaic', () => {
     expect(expanded.outputLength).toBe(expanded.inputLength * 10)
   })
 
+  it('不生成可能跳出正常行框的 Unicode 组合符', () => {
+    const outputs = Array.from({ length: 20 }, (_, seed) =>
+      generateMosaic(SOURCE, [], {
+        volume: 1000,
+        disorder: 100,
+        seed,
+      }).output,
+    ).join('')
+
+    expect(outputs).not.toMatch(/\p{Mark}/u)
+  })
+
   it('相同种子可复现，不同种子会重新侵蚀', () => {
     const candidates = selectKeywords(SOURCE, 14, 1)
     const first = generateMosaic(SOURCE, candidates, {