feat(voice): jump to the call from the voice panel

The channel name under 'Voice Connected' was a plain div. Making it navigate
needed more than an onClick: voiceStore never recorded which space the call
was in, and spaceStore.channels only holds the space currently being viewed —
so after navigating away the call's channel was unresolvable, which is also
why the label degraded to a generic 'Voice Channel'.

Capture space and channel name at join time (the only moment they are
reliable) and use them for both the label and the jump. Covers space calls
and DM calls.

packages/web/src/stores/voiceStore.ts

@@ -17,6 +17,15 @@ export interface ScreenShareConfig {
 interface VoiceState {
   voiceUsers: Map<string, string[]>; // channelId → userIds
   currentVoiceChannelId: string | null;
+  /**
+   * Space and name of the channel the call is in, captured at join time.
+   * `channels` in spaceStore only holds the space the user is *viewing*, so
+   * once they navigate elsewhere the call's channel is no longer resolvable
+   * from it — these keep the voice panel able to name and link to the call.
+   * Transient: intentionally absent from `partialize`.
+   */
+  currentVoiceSpaceId: string | null;
+  currentVoiceChannelName: string | null;
   isMuted: boolean;
   isDeafened: boolean;
   isCameraOn: boolean;
@@ -85,7 +94,7 @@ interface VoiceState {
   setVoiceUsers: (channelId: string, userIds: string[]) => void;
   addVoiceUser: (channelId: string, userId: string) => void;
   removeVoiceUser: (channelId: string, userId: string) => void;
-  setCurrentVoiceChannel: (channelId: string | null) => void;
+  setCurrentVoiceChannel: (channelId: string | null, spaceId?: string | null, channelName?: string | null) => void;
   setParticipants: (participants: ParticipantInfo[]) => void;
   setSpeakingParticipants: (ids: Set<string>) => void;
   setConnectionError: (error: string | null) => void;
@@ -158,6 +167,8 @@ export const useVoiceStore = create<VoiceState>()(
     (set, get) => ({
       voiceUsers: new Map(),
       currentVoiceChannelId: null,
+      currentVoiceSpaceId: null,
+      currentVoiceChannelName: null,
       isMuted: false,
       pttActive: false,
       isDeafened: false,
@@ -349,8 +360,10 @@ export const useVoiceStore = create<VoiceState>()(
         });
       },
 
-      setCurrentVoiceChannel: (channelId) => set({ 
+      setCurrentVoiceChannel: (channelId, spaceId = null, channelName = null) => set({
         currentVoiceChannelId: channelId,
+        currentVoiceSpaceId: channelId ? spaceId : null,
+        currentVoiceChannelName: channelId ? channelName : null,
         activeDmCall: null // Clear active DM call when joining a server channel
       }),
 
@@ -516,6 +529,8 @@ export const useVoiceStore = create<VoiceState>()(
         voiceUsers: new Map(),
         voiceUserStates: new Map(),
         currentVoiceChannelId: null,
+        currentVoiceSpaceId: null,
+        currentVoiceChannelName: null,
         participants: [],
         speakingParticipantIds: new Set(),
         speakingUserIds: new Set(),