fix: repair invite links, social features, messaging + Discord UI overhaul

Phase 1 - Feature Repair:
- Fix member kick/leave: add missing db.delete() call in servers.ts
- Stabilize invite codes: return existing code instead of regenerating
- Fix user search: use LIKE instead of exact match in social.ts
- Wire DM button on FriendsPage to create/navigate to DM channels
- Add cancel outgoing friend request (DELETE endpoint + frontend)
- Add accept/decline friend request actions with WS real-time events
- Fix replyToId persistence in message creation
- Hydrate reactions and replyTo in message queries
- Add joinByCode to API client and serverStore
- Add friend_request_received/accepted WebSocket events

Phase 2 - Discord UI Overhaul:
- Remove stray borders between layout columns
- Replace shadow-sm with shadow-header on content headers
- Replace all bg-gray-*/text-gray-* with Discord color tokens
- Ensure flat color contrast (#1E1F22, #2B2D31, #313338)

Testing:
- Set up vitest + @testing-library/react + jsdom
- Add 17 tests across InviteModal, JoinServer, FriendsPage (all passing)
- Fix vite resolve.extensions to prefer .tsx over stale .js files

packages/web/src/components/voice/VoiceUser.js

@@ -3,6 +3,7 @@ import { useRef, useEffect } from 'react';
 import { Avatar } from '../ui/Avatar';
 export function VoiceUser({ participant }) {
     const videoRef = useRef(null);
+    const audioRef = useRef(null);
     useEffect(() => {
         const videoEl = videoRef.current;
         if (!videoEl)
@@ -16,6 +17,14 @@ export function VoiceUser({ participant }) {
             videoEl.srcObject = null;
         }
     }, [participant.videoTrack, participant.screenTrack]);
+    useEffect(() => {
+        const audioEl = audioRef.current;
+        if (!audioEl || !participant.audioTrack)
+            return;
+        const stream = new MediaStream([participant.audioTrack]);
+        audioEl.srcObject = stream;
+    }, [participant.audioTrack]);
     const hasVideo = participant.isCameraOn || participant.isScreenSharing;
-    return (_jsxs("div", { className: `relative bg-discord-bg-secondary rounded-xl overflow-hidden flex items-center justify-center ${participant.isSpeaking ? 'ring-2 ring-discord-green' : ''}`, style: { aspectRatio: '16/9', minHeight: '200px' }, children: [hasVideo ? (_jsx("video", { ref: videoRef, autoPlay: true, playsInline: true, muted: participant.userId === 'local', className: "w-full h-full object-cover" })) : (_jsx(Avatar, { src: null, name: participant.username, size: 80 })), _jsx("div", { className: "absolute bottom-0 left-0 right-0 p-2 bg-gradient-to-t from-black/60 to-transparent", children: _jsxs("div", { className: "flex items-center justify-between", children: [_jsx("span", { className: "text-sm font-medium text-white", children: participant.username }), _jsx("div", { className: "flex items-center gap-1", children: participant.isMuted && (_jsx("div", { className: "w-5 h-5 bg-discord-red/80 rounded-full flex items-center justify-center", children: _jsxs("svg", { width: "12", height: "12", viewBox: "0 0 24 24", fill: "white", children: [_jsx("path", { d: "M12 2C10.9 2 10 2.9 10 4V12C10 13.1 10.9 14 12 14C13.1 14 14 13.1 14 12V4C14 2.9 13.1 2 12 2Z" }), _jsx("line", { x1: "3", y1: "3", x2: "21", y2: "21", stroke: "white", strokeWidth: "2" })] }) })) })] }) }), participant.isSpeaking && (_jsx("div", { className: "absolute inset-0 rounded-xl ring-2 ring-discord-green animate-pulse pointer-events-none" }))] }));
+    const isLocal = participant.isLocal;
+    return (_jsxs("div", { className: `relative bg-discord-bg-secondary rounded-xl overflow-hidden flex items-center justify-center ${participant.isSpeaking ? 'ring-2 ring-discord-green' : ''}`, style: { aspectRatio: '16/9', minHeight: '200px' }, children: [!isLocal && _jsx("audio", { ref: audioRef, autoPlay: true }), hasVideo ? (_jsx("video", { ref: videoRef, autoPlay: true, playsInline: true, muted: isLocal, className: "w-full h-full object-cover" })) : (_jsx(Avatar, { src: null, name: participant.username, size: 80 })), _jsx("div", { className: "absolute bottom-0 left-0 right-0 p-2 bg-gradient-to-t from-black/60 to-transparent", children: _jsxs("div", { className: "flex items-center justify-between", children: [_jsx("span", { className: "text-sm font-medium text-white", children: participant.username }), _jsx("div", { className: "flex items-center gap-1", children: participant.isMuted && (_jsx("div", { className: "w-5 h-5 bg-discord-red/80 rounded-full flex items-center justify-center", children: _jsxs("svg", { width: "12", height: "12", viewBox: "0 0 24 24", fill: "white", children: [_jsx("path", { d: "M12 2C10.9 2 10 2.9 10 4V12C10 13.1 10.9 14 12 14C13.1 14 14 13.1 14 12V4C14 2.9 13.1 2 12 2Z" }), _jsx("line", { x1: "3", y1: "3", x2: "21", y2: "21", stroke: "white", strokeWidth: "2" })] }) })) })] }) }), participant.isSpeaking && (_jsx("div", { className: "absolute inset-0 rounded-xl ring-2 ring-discord-green animate-pulse pointer-events-none" }))] }));
 }