feat(feedback): 移除联系方式步骤，登录态用户身份已知

之前第三步要求填写微信/钉钉等联系方式，但用户已登录，后端已经
记录 user_id / user_name（与水印取的同一份），可以直接通过内部
渠道触达，无需再问。

流程从 4 步收紧为 3 步：
  1) 选类型
  2) 写内容 + 截图 + 板块
  3) 成功页

提交概览页一并删除（信息不变就直接提交，少一次点击）。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/FeedbackFab.tsx

@@ -71,11 +71,10 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
   const [open, setOpen] = useState(false);
   const [historyOpen, setHistoryOpen] = useState(false);
   const [menuOpen, setMenuOpen] = useState(false);
-  const [step, setStep] = useState<1 | 2 | 3 | 4>(1);
+  const [step, setStep] = useState<1 | 2 | 3>(1); // 1=选类型, 2=写内容, 3=成功页
   const [type, setType] = useState<FeedbackType | null>(null);
   const [mod, setMod] = useState<string>('');
   const [content, setContent] = useState('');
-  const [contact, setContact] = useState('');
   const [shots, setShots] = useState<UploadedImg[]>([]);
   const [uploading, setUploading] = useState(false);
   const [submitting, setSubmitting] = useState(false);
@@ -125,7 +124,6 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
     setStep(1);
     setType(null);
     setContent('');
-    setContact('');
     setShots([]);
     setError(null);
   };
@@ -147,12 +145,11 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
           type,
           module: mod || null,
           content: content.trim(),
-          contact: contact.trim() || null,
           screenshots: shots.map(s => s.url),
           userAgent: navigator.userAgent.slice(0, 500),
         }),
       });
-      setStep(4);
+      setStep(3);
     } catch (e) {
       setError(e instanceof Error ? e.message : String(e));
     } finally {
@@ -162,21 +159,17 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
 
   const next = () => {
     if (step === 1 && !type) return;
-    if (step === 2 && !content.trim()) {
-      taRef.current?.focus();
-      return;
-    }
-    if (step === 3) {
+    if (step === 2) {
+      if (!content.trim()) { taRef.current?.focus(); return; }
       submit();
       return;
     }
-    setStep((step + 1) as typeof step);
   };
 
   const back = () => setStep((Math.max(1, step - 1)) as typeof step);
 
   const canNext = step === 1 ? !!type : step === 2 ? content.trim().length > 0 : true;
-  const progress = ((step === 4 ? 4 : step) / 4) * 100;
+  const progress = step >= 3 ? 100 : (step / 2) * 100;
 
   return (
     <>
@@ -265,13 +258,12 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
                     </div>
                     <div>
                       <div className="text-sm font-black text-slate-800 leading-tight">
-                        {step === 4 ? '收到啦~' : '提个建议'}
+                        {step === 3 ? '收到啦~' : '提个建议'}
                       </div>
                       <div className="text-[10px] text-slate-400 font-bold">
-                        {step === 1 && '第一步 / 共 3 步'}
-                        {step === 2 && '第二步 / 共 3 步'}
-                        {step === 3 && '第三步 / 共 3 步'}
-                        {step === 4 && '感谢你的反馈'}
+                        {step === 1 && '第一步 / 共 2 步'}
+                        {step === 2 && '第二步 / 共 2 步'}
+                        {step === 3 && '感谢你的反馈'}
                       </div>
                     </div>
                   </div>
@@ -411,32 +403,7 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
                   )}
 
                   {step === 3 && (
-                    <motion.div key="s3" initial={{ opacity: 0, x: 12 }} animate={{ opacity: 1, x: 0 }} exit={{ opacity: 0, x: -12 }} transition={{ duration: 0.2 }} className="space-y-3">
-                      <p className="text-[12px] font-bold text-slate-600">方便留个联系方式吗？</p>
-                      <p className="text-[11px] text-slate-400 font-bold">非必填。留下我们可以跟进进展，没留也不影响提交～</p>
-                      <input
-                        type="text"
-                        value={contact}
-                        onChange={(e) => setContact(e.target.value)}
-                        autoFocus
-                        maxLength={120}
-                        placeholder="微信 / 钉钉 / 邮箱 / 手机号 都行"
-                        className="w-full bg-slate-50 border-none rounded-xl p-3 text-[12px] text-slate-700 outline-none focus:ring-2 focus:ring-blue-500/20"
-                      />
-                      <div className="bg-slate-50 rounded-xl p-3 mt-1">
-                        <div className="text-[10px] font-bold text-slate-400 uppercase mb-1.5">提交概览</div>
-                        <div className="text-[11px] text-slate-600 space-y-1">
-                          <div>类型：<span className="font-bold text-slate-800">{TYPE_OPTIONS.find(t => t.key === type)?.label}</span></div>
-                          <div>板块：<span className="font-bold text-slate-800">{MODULE_LABELS[mod] || '通用'}</span></div>
-                          <div className="break-words">内容：<span className="font-bold text-slate-800 line-clamp-3">{content}</span></div>
-                        </div>
-                      </div>
-                      {error && <div className="text-[11px] text-rose-500 font-bold">{error}</div>}
-                    </motion.div>
-                  )}
-
-                  {step === 4 && (
-                    <motion.div key="s4" initial={{ opacity: 0, scale: 0.9 }} animate={{ opacity: 1, scale: 1 }} transition={{ duration: 0.3 }} className="text-center py-6">
+                    <motion.div key="s3" initial={{ opacity: 0, scale: 0.9 }} animate={{ opacity: 1, scale: 1 }} transition={{ duration: 0.3 }} className="text-center py-6">
                       <motion.div
                         initial={{ scale: 0, rotate: -180 }}
                         animate={{ scale: 1, rotate: 0 }}
@@ -446,14 +413,14 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
                         <Check size={28} strokeWidth={3} className="text-white" />
                       </motion.div>
                       <div className="text-base font-black text-slate-800 mb-1">谢谢你的反馈 ❤️</div>
-                      <div className="text-[12px] text-slate-500 font-bold leading-relaxed">产品同学会认真看每一条<br />有进展会通过你留的联系方式同步</div>
+                      <div className="text-[12px] text-slate-500 font-bold leading-relaxed">产品同学会认真看每一条<br />有进展可以在「我的反馈」里查看</div>
                     </motion.div>
                   )}
                 </AnimatePresence>
               </div>
 
               {/* Footer */}
-              {step < 4 && (
+              {step < 3 && (
                 <div className="px-4 py-3 border-t border-slate-100 flex items-center gap-2">
                   {step > 1 && (
                     <button
@@ -469,12 +436,12 @@ export default function FeedbackFab({ module: moduleProp }: Props = {}) {
                     disabled={!canNext || submitting}
                     className="px-4 py-2 rounded-xl text-[12px] font-bold bg-blue-600 text-white shadow shadow-blue-100 disabled:bg-slate-200 disabled:text-slate-400 disabled:shadow-none flex items-center gap-1"
                   >
-                    {submitting ? '提交中…' : step === 3 ? '提交' : '下一步'}
-                    {!submitting && step !== 3 && <ChevronRight size={14} />}
+                    {submitting ? '提交中…' : step === 2 ? '提交' : '下一步'}
+                    {!submitting && step !== 2 && <ChevronRight size={14} />}
                   </button>
                 </div>
               )}
-              {step === 4 && (
+              {step === 3 && (
                 <div className="px-4 py-3 border-t border-slate-100">
                   <button
                     onClick={close}