fix(web): code review round 3 -- UI bugs and remaining design fidelity

- FileAttachment never surfaced a failed authenticated download -- the
  card looked identically clickable whether it worked or not, and
  clicking while broken silently no-op'd. Added an error state/retry
  (useAuthedBlobUrl gained a retry() escape hatch for this).
  ImageAttachment/AudioAttachment already handled this; only the file
  card didn't.
- --shadow-btn was one token serving two different specs: round 2's fix
  (0 6px 16px, from the 50px auth CTAs) actually regressed the 36px
  messaging send button (ConversationView/VoiceRecorder), which needs
  0 4px 12px per 02-messages.dc.html. Split into --shadow-btn /
  --shadow-btn-sm.
- loadOlder's scroll-restore guard compared topicId by value, which
  false-positives on an A->B->A round trip within one request's
  lifetime (same string, but the DOM was torn down and rebuilt by the
  intervening open/close). Switched to a generation counter, same
  pattern as topics.ts's leave-race fix.
- errorToast wasn't included in ConversationView/DetailColumn's
  topicId-reset effects -- a failed action's toast could keep showing
  over a conversation/contact switched to afterward. Also switched
  those effects (and MessagesLayout's) from useEffect to
  useLayoutEffect -- since none of these components remount on
  topicId change, a post-paint effect could let one frame render with
  the previous topicId's stale UI still showing.
- VoiceRecorder never listened for MediaRecorder's own onerror -- a
  mid-recording failure left the "录音中" timer ticking forever with no
  indication the recording had already died.
- VerificationCodeButton's phone-change countdown reset (round 2) only
  cleared the button's own state; RegisterPage/ResetPasswordPage's
  challengeId was still tied to whatever phone the code was actually
  issued for, with nothing cross-checking it against a since-edited
  phone number.
- Agreement's checkbox used bare accent-color on a native input, which
  only tints the checked fill and leaves size/radius/border to the
  browser/OS; replaced with the spec's exact 16x16 border-radius:4px
  box + check glyph.
- Added a catch-all route (App.tsx), TenantFeedbackPage image-picker
  validation feedback + corrected remove-button style, and a handful of
  smaller token/spacing corrections against screens/*.dc.html (NavRail
  font-weight, LoginPage/TenantEntryPage logo size+shadow+color,
  ChatListColumn row padding/icon size, --shadow-modal alpha).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/App.tsx

@@ -48,6 +48,10 @@ const router = createBrowserRouter([
       },
     ],
   },
+  // A stale bookmark/link to a route renamed during this redesign should land somewhere the app
+  // itself resolves (tenant/login/messages, per RequireAuth's own gating), not React Router's
+  // generic unstyled default error boundary.
+  { path: '*', element: <Navigate to="/" replace /> },
 ]);
 
 export default function App() {

web/src/app/NavRail.tsx

@@ -46,7 +46,7 @@ function NavRailButton({ item }: { item: NavRailItem }) {
 export function NavRail({ selfInitial = '我', unreadMessages = 0 }: { selfInitial?: string; unreadMessages?: number }) {
   return (
     <nav className="flex h-full w-16 flex-none flex-col items-center border-r border-[#e6e9ee] bg-surface-rail pb-3 pt-3.5">
-      <div className="mb-[22px] grid h-[38px] w-[38px] place-items-center rounded-[10px] bg-accent text-base font-medium text-white">
+      <div className="mb-[22px] grid h-[38px] w-[38px] place-items-center rounded-[10px] bg-accent text-base font-semibold text-white">
         {selfInitial}
       </div>
       <div className="flex flex-1 flex-col items-center gap-1.5">

web/src/features/auth/LoginPage.tsx

@@ -68,7 +68,7 @@ export function LoginPage() {
       <div className="relative hidden shrink-0 flex-col justify-center overflow-hidden bg-gradient-to-br from-[#1677ff] to-[#0f56c4] px-16 text-white min-[900px]:flex min-[900px]:w-[56%]">
         <div className="pointer-events-none absolute inset-x-0 top-0 h-96 bg-[radial-gradient(circle_at_20%_-10%,rgba(255,255,255,0.25),transparent_60%)]" />
         <div className="absolute left-16 top-14 flex items-center gap-2.5">
-          <div className="grid h-10 w-10 place-items-center rounded-[10px] bg-white text-lg font-bold text-accent">M</div>
+          <div className="grid h-10 w-10 place-items-center rounded-[10px] bg-white text-[22px] font-bold text-accent">M</div>
           <strong className="text-xl font-semibold">{BASE_APP_NAME}</strong>
         </div>
         <h2 className="m-0 max-w-md text-[40px] leading-tight font-semibold text-balance">
@@ -77,7 +77,7 @@ export function LoginPage() {
         <p className="mt-4 max-w-md text-base text-white/80">
           单聊、群聊、通讯录、文件与收藏、音视频通话，消息与回执在桌面端和手机端保持一致。
         </p>
-        <div className="absolute bottom-14 left-16 flex gap-5 text-[13px] text-white/75">
+        <div className="absolute bottom-14 left-16 flex gap-7 text-[13px] text-white/75">
           <span>下载桌面客户端</span>
           <span>iOS / Android</span>
           <span>帮助中心</span>
@@ -93,8 +93,10 @@ export function LoginPage() {
         <div className="flex flex-1 flex-col items-center justify-center">
           <form onSubmit={submit} className="flex w-full max-w-[380px] flex-col gap-4">
             <div className="mb-1 flex flex-col items-center gap-3 min-[900px]:hidden">
-              <div className="grid h-[72px] w-[72px] place-items-center rounded-2xl bg-accent text-3xl font-bold text-white">M</div>
-              <strong className="text-2xl font-bold text-text-heading">{tenant.name}</strong>
+              <div className="grid h-[72px] w-[72px] place-items-center rounded-2xl bg-accent text-[36px] font-bold text-white shadow-[0_10px_26px_rgba(35,74,125,0.18)]">
+                M
+              </div>
+              <strong className="text-[26px] font-bold text-text-title">{tenant.name}</strong>
             </div>
             <div className="hidden flex-col gap-1 min-[900px]:flex">
               <span className="text-[13px] text-text-tertiary-2">{tenant.name}</span>

web/src/features/auth/RegisterPage.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
 
 import { Link, Navigate, useNavigate } from 'react-router-dom';
 
@@ -41,6 +41,14 @@ export function RegisterPage() {
   const [formError, setFormError] = useState('');
   const [submitting, setSubmitting] = useState(false);
 
+  // A challengeId/code pair is only valid for the phone number it was issued for -- without this,
+  // editing the phone after requesting a code (typo fix) leaves a stale challengeId in place that
+  // verifyRegisterCode() has no way to cross-check against the NEW phone in the field.
+  useEffect(() => {
+    setChallengeId('');
+    setCode('');
+  }, [phone]);
+
   if (!tenant) return <Navigate to="/tenant" replace />;
 
   const usingPhone = !!phone;

web/src/features/auth/ResetPasswordPage.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
 
 import { Link, Navigate, useNavigate } from 'react-router-dom';
 
@@ -25,6 +25,14 @@ export function ResetPasswordPage() {
   const [submitting, setSubmitting] = useState(false);
   const [toast, setToast] = useState('');
 
+  // A challengeId/code pair is only valid for the phone number it was issued for -- without this,
+  // editing the phone after requesting a code (typo fix) leaves a stale challengeId in place that
+  // verifyPasswordResetCode() has no way to cross-check against the NEW phone in the field.
+  useEffect(() => {
+    setChallengeId('');
+    setCode('');
+  }, [phone]);
+
   if (!tenant) return <Navigate to="/tenant" replace />;
 
   const submit = async (e: React.FormEvent) => {

web/src/features/auth/TenantEntryPage.tsx

@@ -11,6 +11,7 @@ import { parseWebsocketEndpoint, useSessionStore } from '@/stores/session';
 export function TenantEntryPage() {
   const navigate = useNavigate();
   const setTenant = useSessionStore((s) => s.setTenant);
+  const myUserId = useSessionStore((s) => s.myUserId);
   const [code, setCode] = useState('');
   const [error, setError] = useState('');
   const [submitting, setSubmitting] = useState(false);
@@ -18,6 +19,10 @@ export function TenantEntryPage() {
   const submit = async (e: React.FormEvent) => {
     e.preventDefault();
     if (!code.trim() || submitting) return;
+    // Reachable by navigating back here while already logged in (no route guard keeps an
+    // authenticated user out of /tenant) -- resetTinode() below would otherwise silently tear down
+    // that live session with no warning at all.
+    if (myUserId && !window.confirm('切换企业将退出当前登录，确定继续吗？')) return;
     setSubmitting(true);
     setError('');
     try {
@@ -43,10 +48,10 @@ export function TenantEntryPage() {
       </Link>
       <form onSubmit={submit} className="flex w-full max-w-[380px] flex-col gap-5">
         <div className="mb-2 flex flex-col items-center gap-3">
-          <div className="grid h-[72px] w-[72px] place-items-center rounded-2xl bg-accent text-3xl font-bold text-white">
+          <div className="grid h-[72px] w-[72px] place-items-center rounded-2xl bg-accent text-[36px] font-bold text-white shadow-[0_10px_26px_rgba(35,74,125,0.18)]">
             M
           </div>
-          <strong className="text-2xl font-bold text-text-heading">MeetingIM</strong>
+          <strong className="text-[26px] font-bold text-text-title">MeetingIM</strong>
         </div>
         {error ? (
           <div className="flex items-center gap-1.5 rounded-lg bg-error-strip-bg px-3 py-2.5 text-sm text-error-strip-text">

web/src/features/auth/TenantFeedbackPage.tsx

@@ -25,6 +25,7 @@ export function TenantFeedbackPage() {
   const addImages = (files: FileList | null) => {
     const selected = Array.from(files || []).slice(0, 9 - images.length);
     const valid = selected.filter((f) => f.size <= 10 * 1024 * 1024 && ['image/jpeg', 'image/png', 'image/webp'].includes(f.type));
+    if (valid.length < selected.length) setError('部分图片未添加：仅支持 JPG/PNG/WebP，且不超过 10MB');
     setImages((prev) => prev.concat(valid.map((file) => ({ file, url: URL.createObjectURL(file) }))));
   };
 
@@ -92,21 +93,21 @@ export function TenantFeedbackPage() {
             <span className="self-end text-xs text-text-tertiary-3">{description.length}/500</span>
           </div>
 
-          <div className="grid grid-cols-4 gap-2">
+          <div className="grid grid-cols-4 gap-2.5">
             {images.map((img, i) => (
-              <div key={img.url} className="relative aspect-square overflow-hidden rounded-lg bg-surface-rail">
-                <img src={img.url} alt="" className="h-full w-full object-cover" />
+              <div key={img.url} className="relative aspect-square rounded-lg bg-surface-rail">
+                <img src={img.url} alt="" className="h-full w-full rounded-lg object-cover" />
                 <button
                   type="button"
                   onClick={() => removeImage(i)}
-                  className="absolute right-1 top-1 grid h-5 w-5 place-items-center rounded-full bg-black/50 text-white"
+                  className="absolute -right-1.5 -top-1.5 grid h-[18px] w-[18px] place-items-center rounded-full bg-white text-text-tertiary-1"
                 >
-                  <Icon name="close" className="text-[14px]" />
+                  <Icon name="cancel" className="text-[18px]" />
                 </button>
               </div>
             ))}
             {images.length < 9 ? (
-              <label className="flex aspect-square cursor-pointer flex-col items-center justify-center gap-1 rounded-lg border border-dashed border-[#c5cad2] text-text-tertiary-3">
+              <label className="flex aspect-square cursor-pointer flex-col items-center justify-center gap-1 rounded-lg border-[1.5px] border-dashed border-[#c5cad2] text-text-tertiary-3">
                 <input type="file" accept="image/jpeg,image/png,image/webp" multiple onChange={(e) => addImages(e.target.files)} className="hidden" />
                 <Icon name="add_photo_alternate" className="text-[20px]" />
                 <span className="text-xs">{images.length}/9</span>

web/src/features/auth/components/Agreement.tsx

@@ -1,3 +1,4 @@
+import { Icon } from '@/app/Icon';
 import { BASE_APP_NAME } from '@/lib/config';
 
 interface AgreementProps {
@@ -6,15 +7,23 @@ interface AgreementProps {
   prefix?: string;
 }
 
+/** README/`01-account.dc.html`'s exact 16x16 `border-radius:4px` box with a custom check glyph --
+ *  `accent-color` alone only tints the native widget's fill and leaves its unchecked border/size/
+ *  radius to the browser/OS, which doesn't match this spec on any platform. */
 export function Agreement({ checked, onChange, prefix = `同意${BASE_APP_NAME}` }: AgreementProps) {
   return (
     <label className="flex items-start gap-2 text-[13px] text-text-tertiary-1">
-      <input
-        type="checkbox"
-        checked={checked}
-        onChange={(e) => onChange(e.target.checked)}
-        className="mt-0.5 accent-accent"
-      />
+      <span className="relative mt-0.5 flex-none">
+        <input
+          type="checkbox"
+          checked={checked}
+          onChange={(e) => onChange(e.target.checked)}
+          className="peer absolute inset-0 m-0 h-4 w-4 cursor-pointer appearance-none"
+        />
+        <span className="grid h-4 w-4 place-items-center rounded border-[1.5px] border-[#c5cad2] peer-checked:border-accent peer-checked:bg-accent">
+          {checked ? <Icon name="check" className="text-[12px] text-white" /> : null}
+        </span>
+      </span>
       <span>
         {prefix}{' '}
         <a href="#agreement" onClick={(e) => e.preventDefault()} className="text-accent no-underline">

web/src/features/messages/AttachmentPreview.tsx

@@ -47,7 +47,12 @@ export function FileAttachment({ data }: { data: FileData }) {
       href={href}
       download={data.name}
       onClick={(e) => {
-        if (!href) e.preventDefault();
+        if (remote.error) {
+          e.preventDefault();
+          remote.retry();
+        } else if (!href) {
+          e.preventDefault();
+        }
       }}
       className="flex w-[280px] items-center gap-3 rounded-lg bg-white px-3.5 py-3 no-underline shadow-bubble"
     >
@@ -56,11 +61,15 @@ export function FileAttachment({ data }: { data: FileData }) {
       </span>
       <span className="flex min-w-0 flex-col">
         <span className="truncate text-sm font-medium text-text-body">{data.name || '文件'}</span>
-        <span className="text-xs text-text-tertiary-2">
-          {typeof data.size === 'number' ? formatFileSize(data.size) : ''} · {remote.loading ? '加载中…' : '点击下载'}
+        <span className={`text-xs ${remote.error ? 'text-danger-text' : 'text-text-tertiary-2'}`}>
+          {typeof data.size === 'number' ? formatFileSize(data.size) : ''} ·{' '}
+          {remote.error ? '下载失败，点击重试' : remote.loading ? '加载中…' : '点击下载'}
         </span>
       </span>
-      <Icon name="download" className="ml-auto flex-none text-[20px] text-text-placeholder-2" />
+      <Icon
+        name={remote.error ? 'error_outline' : 'download'}
+        className={`ml-auto flex-none text-[20px] ${remote.error ? 'text-danger-text' : 'text-text-placeholder-2'}`}
+      />
     </a>
   );
 }

web/src/features/messages/ChatListColumn.tsx

@@ -73,10 +73,10 @@ export function ChatListColumn() {
             <Link
               key={entry.key}
               to={entry.route}
-              className="grid min-h-[68px] grid-cols-[44px_minmax(0,1fr)_auto] items-center gap-3 border-b border-list-item bg-white px-4 py-2.5 no-underline hover:bg-[#f6f8fb]"
+              className="grid min-h-[68px] grid-cols-[44px_minmax(0,1fr)_auto] items-center gap-3 border-b border-list-item bg-white py-2.5 pl-4 pr-3 no-underline hover:bg-[#f6f8fb]"
             >
               <span className={`grid h-11 w-11 place-items-center rounded-lg ${entry.colorClass}`}>
-                <Icon name={entry.icon} className="text-[22px]" />
+                <Icon name={entry.icon} className="text-2xl" />
               </span>
               <span className="flex min-w-0 flex-col gap-1">
                 <strong className="truncate text-[15px] font-medium text-[#272b31]">{entry.label}</strong>
@@ -105,7 +105,7 @@ export function ChatListColumn() {
               <Link
                 key={contact.topic}
                 to={`/messages/${contact.topic}`}
-                className={`grid min-h-[68px] grid-cols-[44px_minmax(0,1fr)_auto] items-center gap-3 border-b border-list-item px-4 py-2.5 no-underline ${
+                className={`grid min-h-[68px] grid-cols-[44px_minmax(0,1fr)_auto] items-center gap-3 border-b border-list-item py-2.5 pl-4 pr-3 no-underline ${
                   active ? 'bg-accent-selected-bg' : 'bg-white hover:bg-[#f6f8fb]'
                 }`}
               >

web/src/features/messages/ConversationView.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState } from 'react';
+import { useEffect, useLayoutEffect, useRef, useState } from 'react';
 
 import { Link, useOutletContext, useParams } from 'react-router-dom';
 import type { StoredMessage } from 'tinode-sdk';
@@ -72,10 +72,13 @@ export function ConversationView() {
   const [errorToast, setErrorToast] = useState('');
   const streamRef = useRef<HTMLDivElement>(null);
   const autoScrollRef = useRef(true);
-  const topicIdRef = useRef(topicId);
-  useEffect(() => {
-    topicIdRef.current = topicId;
-  });
+  // Bumped every time a conversation is (re)opened below -- NOT the same as comparing topicId by
+  // value, which would false-positive if the user opens A, then B, then A again within a single
+  // loadOlder() round trip: topicId ends up back at "A" even though the DOM has since been torn
+  // down and rebuilt by the intervening open/close cycle, so a same-topicId check alone would wrongly
+  // treat that as "still the same open" and apply a scroll-restore computed against content that
+  // isn't there anymore.
+  const openGenerationRef = useRef(0);
 
   // Every "fire and forget" send/recall/favorite/forward action below used to swallow its own
   // failure with an empty `.catch(() => {})` (or, for forward, no catch at all) -- e.g. an
@@ -91,7 +94,12 @@ export function ConversationView() {
     };
   }, [topicId]);
 
-  useEffect(() => {
+  // useLayoutEffect, not useEffect -- this component never remounts on topicId change (route is
+  // `:topicId`), so a plain useEffect (which fires after paint) can let one frame render with the
+  // PREVIOUS conversation's select-mode/menu/etc. still showing over the new conversation's message
+  // list underneath, self-correcting only on the next tick.
+  useLayoutEffect(() => {
+    openGenerationRef.current += 1;
     setSelectMode(false);
     setSelectedSeqs(new Set());
     setMenu(null);
@@ -110,6 +118,9 @@ export function ConversationView() {
     // NEW conversation and silently skips scrolling it to the bottom on open.
     setLoadingOlder(false);
     autoScrollRef.current = true;
+    // An error toast from the previous conversation (e.g. "图片发送失败") would otherwise keep
+    // showing over whichever conversation is now open, misattributing the failure.
+    setErrorToast('');
   }, [topicId]);
 
   useEffect(() => {
@@ -139,7 +150,7 @@ export function ConversationView() {
    */
   const loadOlder = async () => {
     if (loadingOlder) return;
-    const calledForTopicId = topicId;
+    const calledForGeneration = openGenerationRef.current;
     const el = streamRef.current;
     const min = topic.minMsgSeq();
     const max = topic.maxMsgSeq();
@@ -151,12 +162,13 @@ export function ConversationView() {
     try {
       await topic.getMessagesPage(MESSAGES_PAGE, gaps, min, max);
     } finally {
-      // If the user switched to a different conversation while this was in flight, `el` is now
-      // showing that OTHER topic's messages -- prevTop/prevHeight were measured against content
-      // that isn't there anymore, so applying them would jump the NEW conversation's scroll
-      // position to a meaningless spot. Only the topic that actually asked for more history should
-      // ever clear its own loading flag or touch the scroll position.
-      if (topicIdRef.current === calledForTopicId) {
+      // If the conversation was closed and reopened (even back to this SAME topicId) while this was
+      // in flight, `el` now shows content from a different open/close cycle -- prevTop/prevHeight
+      // were measured against content that isn't there anymore, so applying them would jump the
+      // current conversation's scroll to a meaningless spot. Comparing topicId alone would miss an
+      // A->B->A round trip (same string, different generation); only the specific open this request
+      // was made for should ever clear its own loading flag or touch the scroll position.
+      if (openGenerationRef.current === calledForGeneration) {
         setLoadingOlder(false);
         requestAnimationFrame(() => {
           if (el) el.scrollTop = prevTop + (el.scrollHeight - prevHeight);
@@ -446,7 +458,7 @@ export function ConversationView() {
                   type="button"
                   onClick={submit}
                   disabled={!draft.trim()}
-                  className="h-9 rounded-lg bg-btn px-5.5 text-sm font-medium text-white shadow-btn disabled:bg-btn-disabled disabled:shadow-none"
+                  className="h-9 rounded-lg bg-btn px-5.5 text-sm font-medium text-white shadow-btn-sm disabled:bg-btn-disabled disabled:shadow-none"
                 >
                   发送
                 </button>

web/src/features/messages/DetailColumn.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useLayoutEffect, useState } from 'react';
 
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
 import { useNavigate } from 'react-router-dom';
@@ -56,10 +56,14 @@ export function DetailColumn({ topicId, peerName, onClose, onOpenHistory }: Deta
 
   // DetailColumn is reused across every contact when docked (no `key={topicId}`, same instance),
   // so without this an in-progress remark edit for the PREVIOUS contact stays open and could be
-  // saved against the NEW one.
-  useEffect(() => {
+  // saved against the NEW one, and a leftover error toast would keep showing over the new contact
+  // misattributing the failure. useLayoutEffect (not useEffect) so this resolves before paint --
+  // this component never remounts on topicId change, so a post-paint effect can let one frame
+  // render with the previous contact's stale edit box still open.
+  useLayoutEffect(() => {
     setRemarkEditing(false);
     setRemarkDraft('');
+    setErrorToast('');
   }, [topicId]);
 
   const friendsQuery = useQuery({ queryKey: ['friends'], queryFn: () => fetchAllPages((cursor) => getFriends('', cursor)) });
@@ -98,7 +102,7 @@ export function DetailColumn({ topicId, peerName, onClose, onOpenHistory }: Deta
   });
 
   const blocksQuery = useQuery({ queryKey: ['blocks'], queryFn: () => fetchAllPages((cursor) => getBlocks(cursor)) });
-  const isBlocked = !!blocksQuery.data?.some((b) => b.user_id === topicId);
+  const isBlocked = !!blocksQuery.data?.some((b) => b.user.user_id === topicId);
 
   const deleteFriendMutation = useMutation({
     mutationFn: () => deleteFriend(topicId),

web/src/features/messages/MessagesLayout.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useLayoutEffect, useState } from 'react';
 
 import { Outlet, useParams } from 'react-router-dom';
 
@@ -37,7 +37,7 @@ export function MessagesLayout() {
   // MessagesLayout is one long-lived instance reused across every conversation (route is
   // `:topicId`) -- a history-search modal left open while switching topics would otherwise keep
   // showing results for whichever topic it was opened against, not the one now on screen.
-  useEffect(() => setHistoryTab(null), [topicId]);
+  useLayoutEffect(() => setHistoryTab(null), [topicId]);
 
   return (
     <div className="relative flex h-full w-full">

web/src/features/messages/VoiceRecorder.tsx

@@ -74,6 +74,16 @@ export function VoiceRecorder({ onSend, onCancel }: VoiceRecorderProps) {
         recorder.ondataavailable = (e) => {
           if (e.data.size > 0) chunksRef.current.push(e.data);
         };
+        // Without this, a mid-recording failure (mic unplugged, OS audio error) auto-transitions
+        // the recorder to 'inactive' with nothing telling the UI -- the "录音中" timer just keeps
+        // ticking forever with no way to know the recording already died until the user manually
+        // hits 取消/发送 and finish()'s own `recorder.state === 'inactive'` check silently no-ops.
+        recorder.onerror = () => {
+          if (finishedRef.current) return;
+          finishedRef.current = true;
+          stopStream();
+          setError('录音失败，请重试');
+        };
         recorder.start();
         recorderRef.current = recorder;
         startedAtRef.current = Date.now();
@@ -125,7 +135,7 @@ export function VoiceRecorder({ onSend, onCancel }: VoiceRecorderProps) {
           type="button"
           onClick={() => finish(true)}
           disabled={!ready}
-          className="flex h-8 items-center gap-1 rounded-lg bg-btn px-4 text-sm font-medium text-white shadow-btn disabled:bg-btn-disabled"
+          className="flex h-8 items-center gap-1 rounded-lg bg-btn px-4 text-sm font-medium text-white shadow-btn-sm disabled:bg-btn-disabled"
         >
           <Icon name="send" className="text-[16px]" />
           发送

web/src/index.css

@@ -103,10 +103,14 @@
 
   /* Shadows */
   --shadow-card: 0 8px 32px rgba(35, 74, 125, 0.10);
-  --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.18);
+  --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.2);
   --shadow-menu: 0 12px 36px rgba(0, 0, 0, 0.16);
   --shadow-bubble: 0 1px 2px rgba(0, 0, 0, 0.06);
+  /* screens/01-account.dc.html's 50px auth CTAs (登录/注册/提交...). */
   --shadow-btn: 0 6px 16px rgba(54, 139, 250, 0.2);
+  /* screens/02-messages.dc.html's 36px 发送 button (ConversationView/VoiceRecorder) -- a smaller
+     button gets a smaller shadow, not the same token as the 50px auth buttons above. */
+  --shadow-btn-sm: 0 4px 12px rgba(54, 139, 250, 0.2);
   --shadow-focus-ring: 0 0 0 3px rgba(22, 119, 255, 0.1);
 }
 

web/src/lib/hooks.ts

@@ -9,8 +9,9 @@ import { fileAuthHeaders, fileDownloadUrl } from '@/lib/api/upload';
  * into a blob URL rather than a direct URL. `ref` is anything fileDownloadUrl accepts: a full
  * "/v0/file/s/xxx" path (Drafty `refurl`), or an absolute URL.
  */
-export function useAuthedBlobUrl(ref: string | undefined): { url: string | null; loading: boolean; error: boolean } {
+export function useAuthedBlobUrl(ref: string | undefined): { url: string | null; loading: boolean; error: boolean; retry: () => void } {
   const [state, setState] = useState<{ url: string | null; loading: boolean; error: boolean }>({ url: null, loading: !!ref, error: false });
+  const [retryCount, setRetryCount] = useState(0);
 
   useEffect(() => {
     if (!ref) return undefined;
@@ -34,9 +35,9 @@ export function useAuthedBlobUrl(ref: string | undefined): { url: string | null;
       cancelled = true;
       if (objectUrl) URL.revokeObjectURL(objectUrl);
     };
-  }, [ref]);
+  }, [ref, retryCount]);
 
-  return state;
+  return { ...state, retry: () => setRetryCount((n) => n + 1) };
 }
 
 /** Ported from the old app's use-cached-data.js -- debounces a fast-changing value (e.g. search input). */