fix(web): SpaceInviteCard navigates to /channels/:spaceId (not the non-existent /spaces/:id)

packages/web/src/components/chat/SpaceInviteCard.test.tsx

@@ -96,6 +96,9 @@ describe('SpaceInviteCard', () => {
     // Specifically NOT called with empty string or undefined
     expect(mockJoinByCode).not.toHaveBeenCalledWith('abc', '');
     expect(mockJoinByCode).not.toHaveBeenCalledWith('abc', undefined);
+    // After a successful join, the app must navigate to the space via the real
+    // route (/channels/:spaceId), not the non-existent /spaces/:id route.
+    await waitFor(() => expect(mockNavigate).toHaveBeenCalledWith('/channels/S1'));
   });
 
   it('navigates to space when join returns "already a member" (no error shown)', async () => {
@@ -111,7 +114,7 @@ describe('SpaceInviteCard', () => {
     const btn = await screen.findByRole('button', { name: /^join$/i });
     await user.click(btn);
 
-    await waitFor(() => expect(mockNavigate).toHaveBeenCalledWith('/spaces/S1'));
+    await waitFor(() => expect(mockNavigate).toHaveBeenCalledWith('/channels/S1'));
     expect(screen.queryByText(/already a member of this space/i)).not.toBeInTheDocument();
   });
 });

packages/web/src/components/chat/SpaceInviteCard.tsx

@@ -54,14 +54,14 @@ export function SpaceInviteCard({ payload, senderName }: Props) {
       // the DM transport origin nor window.location.origin. Empty string maps
       // to undefined so joinByCode follows its local-instance branch.
       const space = await joinByCode(payload.inviteCode, payload.spaceInstanceOrigin || undefined);
-      navigate(`/spaces/${space.id}`);
+      navigate(`/channels/${space.id}`);
     } catch (err) {
       const msg = (err as Error)?.message ?? '';
       if (msg.toLowerCase().includes('already a member')) {
         // Already a member is a successful state — just navigate to the space.
         // Look up the space in the store by id; if not found (rare race), stay
         // silent rather than block the user with a noisy error.
-        navigate(`/spaces/${payload.spaceId}`);
+        navigate(`/channels/${payload.spaceId}`);
         return;
       }
       setJoinError(msg || 'Failed to join');