feat(web): channel-header transfer indicator + global tray panel

packages/web/src/components/layout/MainContent.tsx

@@ -15,6 +15,7 @@ import { Avatar } from '../ui/Avatar';
 import { useVoiceStore } from '../../stores/voiceStore';
 import { wsSend } from '../../hooks/useWebSocket';
 import { MemberListToggleButton } from './MemberListToggleButton';
+import { TransferIndicator } from './TransferIndicator';
 import { isSelf, parseFederatedUsername } from '../../utils/identity';
 import { Tooltip } from '../ui/Tooltip';
 import { joinVoiceChannel } from '../../utils/voice';
@@ -131,6 +132,7 @@ export function MainContent() {
               )}
             </div>
             <div className="flex items-center gap-1 flex-shrink-0">
+              <TransferIndicator />
               <MemberListToggleButton />
             </div>
           </div>
@@ -228,6 +230,7 @@ export function MainContent() {
                 <path d="M21.707 20.293l-5.395-5.395A7.457 7.457 0 0018 10.5 7.5 7.5 0 1010.5 18c1.575 0 3.027-.486 4.228-1.31l5.476 5.476a.997.997 0 001.414 0l.089-.089a1 1 0 000-1.414l.001-.37zM10.5 16a5.5 5.5 0 110-11 5.5 5.5 0 010 11z" />
               </svg>
             </button>
+            <TransferIndicator />
             <div className="w-[1px] h-5 bg-border-soft mx-1" />
             <MemberListToggleButton />
           </div>
@@ -252,6 +255,7 @@ export function MainContent() {
         <div className="h-14 px-5 flex items-center justify-between border-b border-border-hard">
           <span className="text-txt-tertiary">Select a channel</span>
           <div className="flex items-center gap-1 flex-shrink-0">
+            <TransferIndicator />
             <MemberListToggleButton />
           </div>
         </div>
@@ -276,6 +280,7 @@ export function MainContent() {
               <span className="font-bold text-[15px] tracking-[-0.02em] text-txt-primary">{channel.name}</span>
             </div>
             <div className="flex items-center gap-1 flex-shrink-0">
+              <TransferIndicator />
               <MemberListToggleButton />
             </div>
           </div>
@@ -319,6 +324,7 @@ export function MainContent() {
             )}
           </div>
           <div className="flex items-center gap-1 flex-shrink-0">
+            <TransferIndicator />
             <MemberListToggleButton />
           </div>
         </div>
@@ -369,6 +375,7 @@ export function MainContent() {
               <path d="M21.707 20.293l-5.395-5.395A7.457 7.457 0 0018 10.5 7.5 7.5 0 1010.5 18c1.575 0 3.027-.486 4.228-1.31l5.476 5.476a.997.997 0 001.414 0l.089-.089a1 1 0 000-1.414l.001-.37zM10.5 16a5.5 5.5 0 110-11 5.5 5.5 0 010 11z" />
             </svg>
           </button>
+          <TransferIndicator />
           <div className="w-[1px] h-5 bg-border-soft mx-1" />
           <MemberListToggleButton />
         </div>

packages/web/src/components/layout/MobileChatScreen.tsx

@@ -6,6 +6,7 @@ import { useAuthStore } from '../../stores/authStore';
 import { MessageList } from '../chat/MessageList';
 import { MessageInput } from '../chat/MessageInput';
 import { TypingIndicator } from '../chat/TypingIndicator';
+import { TransferIndicator } from './TransferIndicator';
 
 interface MobileChatScreenProps {
   params?: Record<string, string>;
@@ -61,6 +62,7 @@ export function MobileChatScreen({ params }: MobileChatScreenProps) {
             {isDm ? channelName : `# ${channelName}`}
           </h1>
         </div>
+        <TransferIndicator />
         {!isDm && (
           <button
             onClick={() => pushMobileScreen('members')}

packages/web/src/components/layout/TransferIndicator.tsx

@@ -0,0 +1,183 @@
+import React, { useState, useRef, useEffect, useMemo } from 'react';
+import { useTransferStore, type Transfer } from '../../stores/transferStore';
+
+function fmt(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+  if (bytes < 1024 * 1024 * 1024) return `${(bytes / 1024 / 1024).toFixed(1)} MB`;
+  return `${(bytes / 1024 / 1024 / 1024).toFixed(2)} GB`;
+}
+
+export function TransferIndicator() {
+  // Subscribe to the Map directly. `listVisible()` returns a fresh array each call,
+  // which would force a re-render on every store mutation. The Map reference only
+  // changes when transfers are added/removed/updated, so useMemo recomputes only
+  // when needed.
+  const transfersMap = useTransferStore((s) => s.transfers);
+  const visible = useMemo(
+    () => Array.from(transfersMap.values()).filter((t) => t.tray),
+    [transfersMap],
+  );
+
+  const pause = useTransferStore((s) => s.pauseUpload);
+  const resume = useTransferStore((s) => s.resumeUpload);
+  const abort = useTransferStore((s) => s.abortUpload);
+  const pauseDl = useTransferStore((s) => s.pauseDownload);
+  const resumeDl = useTransferStore((s) => s.resumeDownload);
+  const abortDl = useTransferStore((s) => s.abortDownload);
+  const remove = useTransferStore((s) => s.remove);
+
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    if (!open) return;
+    const onClick = (e: MouseEvent) => {
+      if (!ref.current?.contains(e.target as Node)) setOpen(false);
+    };
+    document.addEventListener('mousedown', onClick);
+    return () => document.removeEventListener('mousedown', onClick);
+  }, [open]);
+
+  const active = visible.filter(
+    (t) => t.state === 'active' || t.state === 'paused' || t.state === 'queued',
+  );
+  const failed = visible.some((t) => t.state === 'failed');
+  const idle = visible.length === 0;
+
+  const badgeColor = failed ? 'bg-accent-rose' : 'bg-accent-amber';
+
+  return (
+    <div className="relative" ref={ref}>
+      <button
+        onClick={() => setOpen((v) => !v)}
+        className={`relative w-8 h-8 flex items-center justify-center rounded-[6px] transition-colors ${
+          idle
+            ? 'text-txt-tertiary/60 hover:text-txt-tertiary hover:bg-interactive-hover'
+            : 'text-txt-tertiary hover:text-txt-primary hover:bg-interactive-hover'
+        }`}
+        title="Transfers"
+        aria-label="Transfers"
+      >
+        <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+          <path d="M12 4v12m0 0l-4-4m4 4l4-4M4 20h16" />
+        </svg>
+        {active.length > 0 && (
+          <span className={`absolute -top-0.5 -right-0.5 ${badgeColor} text-black text-[10px] font-medium rounded-full px-1.5 leading-4 min-w-[16px] text-center`}>
+            {active.length}
+          </span>
+        )}
+      </button>
+      {open && (
+        <div className="absolute right-0 top-full mt-2 w-[300px] max-w-[calc(100vw-1rem)] glass z-50 rounded-lg overflow-hidden">
+          <div className="px-3 py-2 border-b border-border-soft text-xs flex justify-between items-center">
+            <span className="text-txt-secondary">
+              {visible.length} transfer{visible.length === 1 ? '' : 's'}
+            </span>
+            <button
+              onClick={() =>
+                visible
+                  .filter((t) => t.state === 'completed' || t.state === 'aborted')
+                  .forEach((t) => remove(t.id))
+              }
+              className="text-txt-tertiary hover:text-txt-primary transition-colors"
+            >
+              Clear completed
+            </button>
+          </div>
+          {visible.length === 0 && (
+            <div className="px-3 py-6 text-center text-txt-tertiary text-xs">
+              No active transfers.
+            </div>
+          )}
+          <div className="max-h-[400px] overflow-y-auto">
+            {visible.map((t) => (
+              <TransferRow
+                key={t.id}
+                transfer={t}
+                onPause={() => (t.type === 'upload' ? pause(t.id) : pauseDl(t.id))}
+                onResume={() => {
+                  if (t.type === 'upload') void resume(t.id);
+                  else void resumeDl(t.id);
+                }}
+                onAbort={() => (t.type === 'upload' ? abort(t.id) : abortDl(t.id))}
+                onDismiss={() => remove(t.id)}
+              />
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+interface TransferRowProps {
+  transfer: Transfer;
+  onPause: () => void;
+  onResume: () => void;
+  onAbort: () => void;
+  onDismiss: () => void;
+}
+
+function TransferRow({ transfer, onPause, onResume, onAbort, onDismiss }: TransferRowProps) {
+  const pct =
+    transfer.progress.total > 0
+      ? Math.min(100, Math.round((transfer.progress.loaded / transfer.progress.total) * 100))
+      : 0;
+  const barColor =
+    transfer.state === 'failed'
+      ? 'bg-accent-rose'
+      : transfer.state === 'completed'
+      ? 'bg-accent-mint'
+      : 'bg-accent-mint/70';
+  return (
+    <div className="px-3 py-2 border-b border-border-soft last:border-none">
+      <div className="flex items-center gap-2 text-[11px]">
+        <span className="text-txt-tertiary text-[10px]">
+          {transfer.type === 'upload' ? '↑' : '↓'}
+        </span>
+        <span className="text-txt-primary truncate flex-1">{transfer.file.name}</span>
+      </div>
+      <div className="mt-1 h-[3px] bg-surface-input rounded overflow-hidden">
+        <div className={`h-full ${barColor} transition-[width]`} style={{ width: `${pct}%` }} />
+      </div>
+      <div className="mt-1 flex justify-between items-center text-[10px] text-txt-tertiary gap-2">
+        <span className="truncate">
+          {transfer.state === 'completed'
+            ? 'Done'
+            : transfer.state === 'failed'
+            ? `Failed: ${transfer.error?.message ?? 'unknown'}`
+            : transfer.state === 'aborted'
+            ? 'Aborted'
+            : `${fmt(transfer.progress.loaded)} / ${fmt(transfer.progress.total)}`}
+        </span>
+        <span className="flex gap-2 flex-shrink-0">
+          {transfer.state === 'active' && (
+            <button onClick={onPause} className="hover:text-txt-primary transition-colors">
+              Pause
+            </button>
+          )}
+          {transfer.state === 'paused' && (
+            <button onClick={onResume} className="hover:text-txt-primary transition-colors">
+              Resume
+            </button>
+          )}
+          {(transfer.state === 'active' ||
+            transfer.state === 'paused' ||
+            transfer.state === 'queued') && (
+            <button onClick={onAbort} className="hover:text-accent-rose transition-colors">
+              Abort
+            </button>
+          )}
+          {(transfer.state === 'completed' ||
+            transfer.state === 'failed' ||
+            transfer.state === 'aborted') && (
+            <button onClick={onDismiss} className="hover:text-txt-primary transition-colors">
+              Dismiss
+            </button>
+          )}
+        </span>
+      </div>
+    </div>
+  );
+}