完善角色与消息权限：收紧板管内容处置，彻底删除仅站长，并统一管理删帖/评弹窗。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/components/StaffDeleteFields.tsx

@@ -0,0 +1,82 @@
+"use client";
+
+import { POST_DELETE_TYPES } from "@/lib/api";
+
+/** 管理软删共用：类型单选 + 仅「其他」时的补充理由 */
+export default function StaffDeleteFields({
+  deleteType,
+  onTypeChange,
+  reason,
+  onReasonChange,
+  reasonId,
+  reasonPlaceholder,
+  typeHint,
+  reasonHint,
+}: {
+  deleteType: string;
+  onTypeChange: (value: string) => void;
+  reason: string;
+  onReasonChange: (value: string) => void;
+  reasonId: string;
+  reasonPlaceholder: string;
+  typeHint: string;
+  reasonHint: string;
+}) {
+  const reasonRequired = deleteType === "other";
+
+  return (
+    <>
+      <p className="mb-2 text-[12.5px] font-medium" style={{ color: "var(--ink)" }}>
+        删除类型
+      </p>
+      <div
+        className="grid grid-cols-1 sm:grid-cols-2 gap-1.5 mb-1"
+        role="radiogroup"
+        aria-label="删除类型"
+      >
+        {POST_DELETE_TYPES.map((t) => {
+          const active = deleteType === t.value;
+          return (
+            <button
+              key={t.value}
+              type="button"
+              role="radio"
+              aria-checked={active}
+              onClick={() => onTypeChange(t.value)}
+              className="text-left rounded-lg px-3 py-2.5 text-[13px] transition-colors"
+              style={{
+                border: `1.5px solid ${active ? "var(--accent)" : "var(--line)"}`,
+                background: active ? "var(--accent-soft)" : "var(--panel-2)",
+                color: active ? "var(--accent)" : "var(--ink)",
+              }}
+            >
+              {t.label}
+            </button>
+          );
+        })}
+      </div>
+      <p className="meta text-[11.5px] mb-4 leading-relaxed">{typeHint}</p>
+      {reasonRequired ? (
+        <>
+          <label
+            className="block mb-1.5 text-[12.5px] font-medium"
+            style={{ color: "var(--ink)" }}
+            htmlFor={reasonId}
+          >
+            补充理由 <span style={{ color: "var(--danger)" }}>*</span>
+          </label>
+          <textarea
+            id={reasonId}
+            className="field"
+            rows={3}
+            value={reason}
+            onChange={(e) => onReasonChange(e.target.value)}
+            placeholder={reasonPlaceholder}
+            maxLength={200}
+          />
+          <p className="meta text-[11.5px] mt-1.5">{reasonHint}</p>
+        </>
+      ) : null}
+    </>
+  );
+}