ShanireZ · ShanireZ · Aug 27, 2026 · Aug 27, 2026
diff --git a/site/index.html b/site/index.html
@@ -51,7 +51,7 @@
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diff --git a/site/src/components/demos/bitmask/BoardDemo.tsx b/site/src/components/demos/bitmask/BoardDemo.tsx
@@ -55,23 +55,23 @@ export default function BoardDemo() {
           <div>
             <div className="stepper__lab">棋盘边长 N</div>
             <div className="stepper__row">
-              <button onClick={() => changeN(N - 1)} disabled={N <= 3} aria-label="N 减">
+              <button type="button" onClick={() => changeN(N - 1)} disabled={N <= 3} aria-label="N 减">
                 <Minus size={13} />
               </button>
               <span className="stepper__val">{N}</span>
-              <button onClick={() => changeN(N + 1)} disabled={N >= 6} aria-label="N 加">
+              <button type="button" onClick={() => changeN(N + 1)} disabled={N >= 6} aria-label="N 加">
                 <Plus size={13} />
               </button>
             </div>
           </div>
           <div>
             <div className="stepper__lab">放置王数 K</div>
             <div className="stepper__row">
-              <button onClick={() => changeK(K - 1)} disabled={K <= 1} aria-label="K 减">
+              <button type="button" onClick={() => changeK(K - 1)} disabled={K <= 1} aria-label="K 减">
                 <Minus size={13} />
               </button>
               <span className="stepper__val">{K}</span>
-              <button onClick={() => changeK(K + 1)} disabled={K >= N * N} aria-label="K 加">
+              <button type="button" onClick={() => changeK(K + 1)} disabled={K >= N * N} aria-label="K 加">
                 <Plus size={13} />
               </button>
             </div>
@@ -148,7 +148,7 @@ export default function BoardDemo() {
           />
 
           <div className="bm__count-row">
-            <button className="bm__count-btn" onClick={() => setShowCount((s) => !s)}>
+            <button type="button" className="bm__count-btn" onClick={() => setShowCount((s) => !s)}>
               <Sigma size={15} /> {showCount ? '收起方案总数' : '看方案总数（状压 DP）'}
             </button>
             {showCount && total != null && (

diff --git a/site/src/components/demos/bitmask/CoverDemo.tsx b/site/src/components/demos/bitmask/CoverDemo.tsx
@@ -81,7 +81,7 @@ export default function CoverDemo() {
                 {Array.from({ length: N }, (_, el) => {
                   const on = ((c.cover >> el) & 1) === 1
                   return (
-                    <button
+                    <button type="button"
                       key={el}
                       className={`bm__cover-cell${on ? ' on' : ''}`}
                       onClick={() => toggleCover(ci, el)}
@@ -94,18 +94,18 @@ export default function CoverDemo() {
               </div>
               <div className="bm__choice-cost">
                 <span>代价</span>
-                <button onClick={() => bumpCost(ci, -1)} disabled={c.cost <= 1} aria-label="代价减">
+                <button type="button" onClick={() => bumpCost(ci, -1)} disabled={c.cost <= 1} aria-label="代价减">
                   <Minus size={11} />
                 </button>
                 <b>{c.cost}</b>
-                <button onClick={() => bumpCost(ci, 1)} disabled={c.cost >= 15} aria-label="代价加">
+                <button type="button" onClick={() => bumpCost(ci, 1)} disabled={c.cost >= 15} aria-label="代价加">
                   <Plus size={11} />
                 </button>
               </div>
             </div>
           ))}
         </div>
-        <button className="bm__reset" onClick={reset} aria-label="重置">
+        <button type="button" className="bm__reset" onClick={reset} aria-label="重置">
           <RotateCcw size={13} /> 复位
         </button>
       </div>

diff --git a/site/src/components/demos/bitmask/SubsetEnumDemo.tsx b/site/src/components/demos/bitmask/SubsetEnumDemo.tsx
@@ -46,7 +46,7 @@ export default function SubsetEnumDemo() {
             {Array.from({ length: N }, (_, i) => {
               const on = ((S >> i) & 1) === 1
               return (
-                <button
+                <button type="button"
                   key={i}
                   className={`bm__toggle${on ? ' on' : ''}`}
                   onClick={() => toggle(i)}

diff --git a/site/src/components/demos/bitmask/TspDemo.tsx b/site/src/components/demos/bitmask/TspDemo.tsx
@@ -89,28 +89,28 @@ export default function TspDemo() {
               <div className="bm__mover" key={i}>
                 <span className="bm__mover-id">{i}</span>
                 <div className="bm__pad">
-                  <button onClick={() => move(i, 0, 1)} aria-label={`点${i}上移`}>↑</button>
+                  <button type="button" onClick={() => move(i, 0, 1)} aria-label={`点${i}上移`}>↑</button>
                   <div className="bm__pad-mid">
-                    <button onClick={() => move(i, -1, 0)} aria-label={`点${i}左移`}>←</button>
+                    <button type="button" onClick={() => move(i, -1, 0)} aria-label={`点${i}左移`}>←</button>
                     <span className="bm__coord">
                       {p.x},{p.y}
                     </span>
-                    <button onClick={() => move(i, 1, 0)} aria-label={`点${i}右移`}>→</button>
+                    <button type="button" onClick={() => move(i, 1, 0)} aria-label={`点${i}右移`}>→</button>
                   </div>
-                  <button onClick={() => move(i, 0, -1)} aria-label={`点${i}下移`}>↓</button>
+                  <button type="button" onClick={() => move(i, 0, -1)} aria-label={`点${i}下移`}>↓</button>
                 </div>
               </div>
             ))}
           </div>
           <div className="bm__count">
             <span className="demo-control__group-label" style={{ margin: 0 }}>点数 {n}</span>
-            <button onClick={removePt} disabled={n <= 3} aria-label="减少点">
+            <button type="button" onClick={removePt} disabled={n <= 3} aria-label="减少点">
               <Minus size={13} />
             </button>
-            <button onClick={addPt} disabled={n >= 5} aria-label="增加点">
+            <button type="button" onClick={addPt} disabled={n >= 5} aria-label="增加点">
               <Plus size={13} />
             </button>
-            <button className="bm__reset" onClick={() => setPts(INIT)} aria-label="重置点位">
+            <button type="button" className="bm__reset" onClick={() => setPts(INIT)} aria-label="重置点位">
               <RotateCcw size={13} /> 复位
             </button>
           </div>