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.

tests/cancelled-turn-live.test.ts

@@ -29,7 +29,7 @@ async function runAndCancel(runtime: AgentRuntime, conversationId: string): Prom
   let partial = ''
   try {
     for await (const event of runtime.run({
-      requestId: crypto.randomUUID(), conversationId, workMode: 'ask', prompt: firstPrompt
+      requestId: crypto.randomUUID(), conversationId, prompt: firstPrompt
     }, controller.signal)) {
       if (event.type === 'text') partial += event.delta
       if (partial.length >= 60 && !controller.signal.aborted) controller.abort(new Error('用户取消了请求'))
@@ -87,7 +87,7 @@ describe.skipIf(!envPath)('cancelled turn handling with a real model', () => {
       ])
       expect(history).toHaveLength(2)
       expectOnlyNewAnswer(await runText(runtime, {
-        requestId: crypto.randomUUID(), conversationId, workMode: 'ask', prompt: secondPrompt,
+        requestId: crypto.randomUUID(), conversationId, prompt: secondPrompt,
         history: history.map(({ role, content }) => ({ role, content })),
         historyMessageIds: history.map(({ id }) => id)
       }))
@@ -107,7 +107,7 @@ describe.skipIf(!envPath)('cancelled turn handling with a real model', () => {
         { id: crypto.randomUUID(), role: 'assistant', content: '', state: 'error', terminalStatus: 'cancelled' }
       ])
       expectOnlyNewAnswer(await runText(runtime, {
-        requestId: crypto.randomUUID(), conversationId: crypto.randomUUID(), workMode: 'ask', prompt: secondPrompt,
+        requestId: crypto.randomUUID(), conversationId: crypto.randomUUID(), prompt: secondPrompt,
         history: history.map(({ role, content }) => ({ role, content })),
         historyMessageIds: history.map(({ id }) => id)
       }))
@@ -130,12 +130,12 @@ describe.skipIf(!envPath)('cancelled turn handling with a real model', () => {
       const partial = await runAndCancel(runtime, conversationId)
       console.info(`OPENCODE_PARTIAL_CHARS=${partial.length}`)
       expectOnlyNewAnswer(await runText(runtime, {
-        requestId: crypto.randomUUID(), conversationId, workMode: 'ask', prompt: secondPrompt
+        requestId: crypto.randomUUID(), conversationId, prompt: secondPrompt
       }))
       // The cancelled request stays in the native transcript, so the model
       // still knows what was asked before.
       const recall = await runText(runtime, {
-        requestId: crypto.randomUUID(), conversationId, workMode: 'ask',
+        requestId: crypto.randomUUID(), conversationId,
         prompt: 'In one short phrase, what did I ask for in my very first message of this conversation? Do not list anything.'
       })
       console.info(`OPENCODE_RECALL=${JSON.stringify(recall)}`)