fix(mobile): restore agent invocation target_type "team" enum value

AgentInvocationTarget.target_type's "team" is an unrelated, inert
placeholder from migration 130 (agent_invocation_permission) —
"reserved for the future team concept... NOT effective in V1" — not
the workspace Team entity this branch renamed to Space. The server's
CHECK constraint, Go constant, and packages/core/types/agent.ts all
still say "team"; only apps/mobile/data/schemas.ts had been swept to
"space" by mistake (most likely an overzealous find/replace during the
Team→Space rename), which desynced it from the server and broke
mobile's typecheck. Revert schemas.ts and its test back to "team" to
match the real server contract.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/mobile/data/schemas.ts

@@ -551,7 +551,7 @@ export const EMPTY_MEMBER_LIST: MemberWithUser[] = [];
 
 const AgentInvocationTargetSchema: z.ZodType<AgentInvocationTarget> = z
   .object({
-    target_type: z.enum(["workspace", "member", "space"]).catch("space"),
+    target_type: z.enum(["workspace", "member", "team"]).catch("team"),
     target_id: z
       .string()
       .nullable()

apps/mobile/lib/agent-schema.test.ts

@@ -35,7 +35,7 @@ describe("AgentSchema invocation permissions", () => {
 
     expect(parsed.permission_mode).toBe("private");
     expect(parsed.invocation_targets).toEqual([
-      { target_type: "space", target_id: null },
+      { target_type: "team", target_id: null },
     ]);
   });
 });