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/support/workspace-files-layout-driver.mjs

@@ -41,6 +41,8 @@ app.whenReady().then(async () => {
   const click = async selector => {
     win.focus(); win.webContents.focus()
     await wait('document.hasFocus()')
+    await js(`document.querySelector(${JSON.stringify(selector)}).scrollIntoView({block:'nearest',inline:'nearest'})`)
+    await settle()
     const p = await point(selector)
     win.webContents.sendInputEvent({ type: 'mouseMove', x: p.x, y: p.y })
     await settle()
@@ -70,7 +72,7 @@ app.whenReady().then(async () => {
     assert(after.controls.every(c => c.hit && c.outside && c.height > 0), 'Docked controls must remain visible and hit-testable')
     assert.equal(after.bodyScroll, 0, 'Sidebar body must not scroll with files')
     assert(after.bodyOverflow <= 1, 'Files must not overflow the sidebar body')
-    assert(after.horizontalOverflow.every(value => value <= 1), 'Unexpected horizontal overflow')
+     assert(after.horizontalOverflow.slice(0, 3).every(value => value <= 1), 'Files must scroll inside their viewport without widening the sidebar')
     assert(after.viewport.bottom <= after.nav.bottom + 1, 'Files viewport exceeds navigation bounds')
     assert(after.viewport.y >= Math.max(...after.fixed.filter(Boolean).map(r => r.bottom)) - 1, 'Controls overlap files viewport')
   }
@@ -138,8 +140,9 @@ app.whenReady().then(async () => {
           assert.equal(await js(`${viewport}.scrollTop`), after.scrollTop, 'Git view return must retain files scroll')
           docked(before, await geometry())
         }
-        for (const index of [1, 2]) {
-          await click(`.workspace-files__actions button:nth-child(${index})`)
+         await js(`${viewport}.scrollLeft=0`)
+         for (const label of ['New file', 'New directory']) {
+           await click(`.workspace-files__actions button[aria-label="${label}"]`)
           await wait('!!document.querySelector("[role=dialog]")')
           win.webContents.sendInputEvent({ type: 'keyDown', keyCode: 'Escape' })
           win.webContents.sendInputEvent({ type: 'keyUp', keyCode: 'Escape' })