fix:优化工作面板，支持动态字数

app/static/app.js

@@ -17,6 +17,15 @@ const wechatBtn = $("wechatBtn");
 const imBtn = $("imBtn");
 const coverUploadBtn = $("coverUploadBtn");
 const logoutBtn = $("logoutBtn");
+const targetBodyCharsInput = $("targetBodyChars");
+
+function syncTargetCharChips() {
+  const val = Number((targetBodyCharsInput && targetBodyCharsInput.value) || 0);
+  document.querySelectorAll(".target-char-chip").forEach((btn) => {
+    const n = Number(btn.getAttribute("data-target-chars") || 0);
+    btn.classList.toggle("is-active", Number.isFinite(val) && val === n);
+  });
+}
 
 function countText(v) {
   return (v || "").trim().length;
@@ -183,12 +192,30 @@ if (logoutBtn) {
   });
 }
 
+document.querySelectorAll(".target-char-chip").forEach((btn) => {
+  btn.addEventListener("click", () => {
+    const n = Number(btn.getAttribute("data-target-chars") || 0);
+    if (!targetBodyCharsInput || !Number.isFinite(n) || n < 1) return;
+    targetBodyCharsInput.value = String(n);
+    syncTargetCharChips();
+  });
+});
+
+if (targetBodyCharsInput) {
+  targetBodyCharsInput.addEventListener("input", syncTargetCharChips);
+}
+
 $("rewriteBtn").addEventListener("click", async () => {
   const sourceText = $("sourceText").value.trim();
+  const targetBodyChars = Number(($("targetBodyChars") && $("targetBodyChars").value) || 500);
   if (sourceText.length < 20) {
     setStatus("原始内容太短，至少 20 个字符", true);
     return;
   }
+  if (!Number.isFinite(targetBodyChars) || targetBodyChars < 180 || targetBodyChars > 2200) {
+    setStatus("改写目标字数需在 180~2200 之间", true);
+    return;
+  }
 
   setStatus("正在改写...");
   setLoading(rewriteBtn, true, "改写并排版", "改写中...");
@@ -202,6 +229,7 @@ $("rewriteBtn").addEventListener("click", async () => {
       audience,
       keep_points: $("keepPoints").value,
       avoid_words: $("avoidWords").value,
+      target_body_chars: Math.round(targetBodyChars),
     });
     $("title").value = data.title || "";
     $("summary").value = data.summary || "";
@@ -307,3 +335,4 @@ $("imBtn").addEventListener("click", async () => {
 updateCounters();
 initMultiDropdowns();
 initWechatAccountSwitch();
+syncTargetCharChips();