refactor: rename Server → Space across entire codebase

Renames all domain terminology from "Server" to "Space" throughout the
application — database schema, API routes, shared types, stores, components,
and UI strings. Files renamed: ServerSidebar → SpaceSidebar, CreateServer →
CreateSpace, JoinServer → JoinSpace, ServerSettings → SpaceSettings,
serverStore → spaceStore, routes/servers → routes/spaces.

packages/web/src/components/voice/IncomingCallModal.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useRef } from 'react';
 import { useVoiceStore } from '../../stores/voiceStore';
-import { useServerStore } from '../../stores/serverStore';
+import { useSpaceStore } from '../../stores/spaceStore';
 import { wsSend } from '../../hooks/useWebSocket';
 import { getAvatarGradient } from '../../utils/gradients';
 import { parseFederatedUsername } from '../../utils/identity';
@@ -27,7 +27,7 @@ export function IncomingCallModal() {
     };
   }, [incomingCall, setIncomingCall]);
 
-  const dmChannels = useServerStore((s) => s.dmChannels);
+  const dmChannels = useSpaceStore((s) => s.dmChannels);
 
   if (!incomingCall) return null;
 

packages/web/src/components/voice/PictureInPicture.tsx

@@ -3,7 +3,7 @@ import { useNavigate } from 'react-router-dom';
 import { useVoiceStore } from '../../stores/voiceStore';
 import { useChatStore } from '../../stores/chatStore';
 import { useUIStore } from '../../stores/uiStore';
-import { useServerStore } from '../../stores/serverStore';
+import { useSpaceStore } from '../../stores/spaceStore';
 import { Avatar } from '../ui/Avatar';
 import type { ParticipantInfo } from '../../hooks/useLiveKit';
 
@@ -111,8 +111,8 @@ export function PictureInPicture() {
   const voiceFullscreen = useUIStore((s) => s.voiceFullscreen);
   const pipCollapsed = useUIStore((s) => s.pipCollapsed);
   const setPipCollapsed = useUIStore((s) => s.setPipCollapsed);
-  const channelToServerMap = useServerStore((s) => s.channelToServerMap);
-  const channels = useServerStore((s) => s.channels);
+  const channelToSpaceMap = useSpaceStore((s) => s.channelToSpaceMap);
+  const channels = useSpaceStore((s) => s.channels);
 
   // Drag state
   const [position, setPosition] = useState<{ x: number; y: number }>({ x: -1, y: -1 });
@@ -291,16 +291,16 @@ export function PictureInPicture() {
       if (activeDmCall) {
         navigate(`/channels/@me/${activeDmCall.dmChannelId}`);
       } else if (currentVoiceChannelId) {
-        const serverId = channelToServerMap.get(currentVoiceChannelId);
-        if (serverId) {
-          navigate(`/channels/${serverId}/${currentVoiceChannelId}`);
+        const spaceId = channelToSpaceMap.get(currentVoiceChannelId);
+        if (spaceId) {
+          navigate(`/channels/${spaceId}/${currentVoiceChannelId}`);
         }
       }
     } else {
       // Drag ended — snap to edge
       snapToEdge(position.x, position.y);
     }
-  }, [isDragging, activeDmCall, currentVoiceChannelId, channelToServerMap, navigate, snapToEdge, position]);
+  }, [isDragging, activeDmCall, currentVoiceChannelId, channelToSpaceMap, navigate, snapToEdge, position]);
 
   const handleClose = useCallback((e: React.MouseEvent) => {
     e.stopPropagation();

packages/web/src/components/voice/VoiceChannel.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { useVoiceStore } from '../../stores/voiceStore';
 
 const EMPTY_VOICE_USERS: string[] = [];
-import { useServerStore } from '../../stores/serverStore';
+import { useSpaceStore } from '../../stores/spaceStore';
 import { Avatar } from '../ui/Avatar';
 
 interface VoiceChannelProps {
@@ -23,7 +23,7 @@ export function VoiceChannel({ channelId, channelName, onClick }: VoiceChannelPr
     const local = s.participants.find(p => p.isLocal);
     return local?.userId ?? null;
   });
-  const members = useServerStore((s) => s.members);
+  const members = useSpaceStore((s) => s.members);
   const isActive = currentVoiceChannel === channelId;
 
   return (

packages/web/src/components/voice/VoiceControlBar.tsx

@@ -3,7 +3,7 @@ import { useVoiceStore } from '../../stores/voiceStore';
 import { useUIStore } from '../../stores/uiStore';
 import { getActiveRoom } from '../../hooks/useLiveKit';
 import { wsSend } from '../../hooks/useWebSocket';
-import { getChannelOrigin } from '../../stores/serverStore';
+import { getChannelOrigin } from '../../stores/spaceStore';
 import { ScreenShareSettingsPopover } from './ScreenShareSettingsPopover';
 import { CAMERA_PRESET, startScreenShare, stopScreenShare } from '../../utils/screenShare';
 

packages/web/src/components/voice/VoiceControls.tsx

@@ -1,6 +1,6 @@
 import React, { useState } from 'react';
 import { useVoiceStore } from '../../stores/voiceStore';
-import { useServerStore, getChannelOrigin } from '../../stores/serverStore';
+import { useSpaceStore, getChannelOrigin } from '../../stores/spaceStore';
 import { getActiveRoom } from '../../hooks/useLiveKit';
 import { wsSend } from '../../hooks/useWebSocket';
 import { ScreenShareSettingsPopover } from './ScreenShareSettingsPopover';
@@ -21,7 +21,7 @@ export function VoiceControls() {
   const connectionError = useVoiceStore((s) => s.connectionError);
   const isLiveKitConnected = useVoiceStore((s) => s.isLiveKitConnected);
   const connectionQuality = useVoiceStore((s) => s.connectionQuality);
-  const channels = useServerStore((s) => s.channels);
+  const channels = useSpaceStore((s) => s.channels);
   const [showScreenShareSettings, setShowScreenShareSettings] = useState(false);
   const [showConnectionInfo, setShowConnectionInfo] = useState(false);