feat: unify execution and add workspace file imports

Remove Ask/Execute modes and general product tool approvals so requests use the selected runtime, enabled capabilities, and execution account permissions. Migrate retired application metadata while preserving user content.

Retire the Results page while retaining conversation images and stored artifacts. Add local and remote workspace file imports, timestamps and sorting, improve image discovery and saving, and refine workspace navigation and supervision responsiveness. Include the accompanying web-search changes, tests, probes, and product documentation.

Remote imports require an updated Agent. Existing artifacts are not automatically copied into project directories. Validation evidence and outstanding failures remain documented in feature progress files; no full test suite or real-model calls were rerun for this commit.

Release note: Run requests without switching work modes, import files into a selected local or remote workspace folder, sort workspace files by date, and keep using conversation images after removal of the Results page.

src/main/readonly-query-worker.ts

@@ -3,13 +3,16 @@ import { z } from 'zod'
 import { AssistantDatabase } from './assistant/assistant-database'
 import { KnowledgeDatabase } from './knowledge/knowledge-database'
 import type { ReadonlyQueryKind, ReadonlyQueryRequest } from './readonly-query-reader'
+import type { ReviewState } from './assistant/supervision-review-store'
 
 // Read-only query worker (PERF-15/16 first slice). One worker per database file.
 // It reuses the production classes on a read-only connection, so results are
 // produced by exactly the same code as the synchronous path.
+// This packaged entry also hosts the WAL checkpointer and the dedicated,
+// separately connected supervision manifest writer.
 
 const { kind, databasePath, intervalMs } = workerData as {
-  kind: ReadonlyQueryKind | 'checkpoint'
+  kind: ReadonlyQueryKind | 'checkpoint' | 'supervision'
   databasePath: string
   intervalMs?: number
 }
@@ -36,6 +39,16 @@ if (kind === 'checkpoint') {
   }
   handlers = {}
   parentPort!.postMessage({ ready: true })
+} else if (kind === 'supervision') {
+  // Only manifest initialization and resume validation write here. Publication
+  // and checkpoints remain in Main's existing atomic result transaction.
+  const database = new AssistantDatabase(databasePath)
+  database.openSupervisionWorker()
+  close = () => database.close()
+  handlers = {
+    initialize: ([runId, state], signal) => database.supervisionReviewStore(signal).initializeSources(String(runId), state as ReviewState, signal),
+    resume: ([runId], signal) => database.supervisionReviewStore(signal).resume(String(runId), signal)
+  }
 } else if (kind === 'knowledge') {
   const database = new KnowledgeDatabase(databasePath)
   database.openReadOnly()
@@ -60,7 +73,12 @@ if (kind === 'checkpoint') {
     getConversation: ([conversationId]) => database.readSnapshot(() =>
       database.getConversation(conversationId as string)),
     activityHistoryPage: ([input]) => database.getActivityHistoryPage(input),
-    activityHistorySummary: ([input]) => database.getActivityHistorySummary(input)
+    activityHistorySummary: ([input]) => database.getActivityHistorySummary(input),
+    reviewContext: ([request]) => {
+      const scope = (request as ReviewState['request']).scope
+      return database.readSnapshot(() => ({ summary: database.reviewSummary(scope, 'supervisor'), background: database.reviewBackground(scope) }))
+    },
+    reviewCandidates: ([request]) => database.listSupervisionCandidates(request as ReviewState['request'])
   }
 }