feat(managed-agent): promote the vault disclaimer to the switch label

Reviewer feedback: the previous version buried the security disclaimer
under a generic "Vault authorization" title with the full text below in
the description. Users would only see "Vault authorization" next to the
toggle and might not read the description.

Move the whole "I own or am authorized to use these vaults. I understand
this means this agent can assume the identity granted by them." string
to the switch's title so it sits right next to the toggle. Description
line collapses to the run-time constraint: "Required when at least one
vault is selected above."

No functional change; the run-time enforcement (tool rejects when
`vaults` is non-empty and the ack is falsy) is unchanged.

Author: rdematos

apps/sim/blocks/blocks/managed_agent_cloud.ts

@@ -86,11 +86,11 @@ export const ManagedAgentCloudBlock: BlockConfig = {
       // rejects execution with an actionable error if `vaults` is
       // non-empty but this is false.
       id: 'vaultsAck',
-      title: 'Vault authorization',
+      title:
+        'I own or am authorized to use these vaults. I understand this means this agent can assume the identity granted by them.',
       type: 'switch',
       required: false,
-      description:
-        'I own or am authorized to use these vaults. I understand this means this agent can assume the identity granted by them. Required when at least one vault is selected above.',
+      description: 'Required when at least one vault is selected above.',
     },
     {
       // Memory store — attached as a `memory_store` resource entry.

apps/sim/blocks/blocks/managed_agent_self_hosted.ts

@@ -133,11 +133,11 @@ export const ManagedAgentSelfHostedBlock: BlockConfig = {
       // Security ack — enforced at execution time when at least one vault
       // is selected. See the sibling comment on `managed_agent_cloud.ts`.
       id: 'vaultsAck',
-      title: 'Vault authorization',
+      title:
+        'I own or am authorized to use these vaults. I understand this means this agent can assume the identity granted by them.',
       type: 'switch',
       required: false,
-      description:
-        'I own or am authorized to use these vaults. I understand this means this agent can assume the identity granted by them. Required when at least one vault is selected above.',
+      description: 'Required when at least one vault is selected above.',
     },
     ...memorySubBlocks,
     {