fix: clarify quick share creation failures

web/src/features/home/Home.tsx

@@ -6,6 +6,7 @@ import { useGlobalPaste } from '@/lib/useGlobalPaste';
 import { useChannels } from '@/store/channels';
 import { useShares } from '@/store/shares';
 import { solveCreationCaptcha } from '@/core-bridge/captcha';
+import { errorMessage } from '@/core-bridge/errors';
 import { Button } from '@/ui/Button';
 import { ChannelList } from './ChannelList';
 import { CreateSheet } from './CreateSheet';
@@ -22,7 +23,7 @@ export function Home() {
   const [createOpen, setCreateOpen] = useState(false);
   const [scanOpen, setScanOpen] = useState(false);
   const [busy, setBusy] = useState(false);
-  const [failed, setFailed] = useState(false);
+  const [failedMessage, setFailedMessage] = useState('');
   const [shareText, setShareText] = useState('');
   const [shareFiles, setShareFiles] = useState<File[]>([]);
 
@@ -32,15 +33,15 @@ export function Home() {
     async (p: ClipboardPayload) => {
       if (busy || (p.files.length === 0 && !p.text.trim())) return false;
       setBusy(true);
-      setFailed(false);
+      setFailedMessage('');
       try {
         const captchaToken = await solveCreationCaptcha();
         open(await createDraft(p, captchaToken));
         setShareFiles([]);
         setShareText('');
         return true;
-      } catch {
-        setFailed(true);
+      } catch (error) {
+        setFailedMessage(errorMessage(error));
         return false;
       } finally {
         setBusy(false);
@@ -71,7 +72,7 @@ export function Home() {
           onFilesChange={setShareFiles}
           onShare={share}
         />
-        {failed ? <p role="alert" className={styles.error}>创建分享失败,请重试。</p> : null}
+        {failedMessage ? <p role="alert" className={styles.error}>创建分享失败：{failedMessage}</p> : null}
 
         <ChannelList kind="share" title="我的分享" onOpen={open} />
 

web/src/features/home/QuickShare.module.css

@@ -58,8 +58,7 @@
 }
 
 .editor:focus-visible {
-  outline: 2px solid var(--accent);
-  outline-offset: 2px;
+  outline: none;
 }
 
 .editor::placeholder {