feat: cron agent binding + doctor UI refresh

apps/macos/Tests/ClawdbotIPCTests/CronJobEditorSmokeTests.swift

@@ -23,7 +23,9 @@ struct CronJobEditorSmokeTests {
     @Test func cronJobEditorBuildsBodyForExistingJob() {
         let job = CronJob(
             id: "job-1",
+            agentId: "ops",
             name: "Daily summary",
+            description: nil,
             enabled: true,
             createdAtMs: 1_700_000_000_000,
             updatedAtMs: 1_700_000_000_000,

apps/macos/Tests/ClawdbotIPCTests/CronModelsTests.swift

@@ -60,6 +60,7 @@ struct CronModelsTests {
     @Test func displayNameTrimsWhitespaceAndFallsBack() {
         let base = CronJob(
             id: "x",
+            agentId: nil,
             name: "  hello  ",
             description: nil,
             enabled: true,
@@ -81,6 +82,7 @@ struct CronModelsTests {
     @Test func nextRunDateAndLastRunDateDeriveFromState() {
         let job = CronJob(
             id: "x",
+            agentId: nil,
             name: "t",
             description: nil,
             enabled: true,

apps/macos/Tests/ClawdbotIPCTests/SettingsViewSmokeTests.swift

@@ -12,6 +12,7 @@ struct SettingsViewSmokeTests {
 
         let job1 = CronJob(
             id: "job-1",
+            agentId: "ops",
             name: "  Morning Check-in  ",
             description: nil,
             enabled: true,
@@ -32,6 +33,7 @@ struct SettingsViewSmokeTests {
 
         let job2 = CronJob(
             id: "job-2",
+            agentId: nil,
             name: "",
             description: nil,
             enabled: false,