fix(terminal): judge an agent's --shell against the runtime it runs in (#28234)

* fix(terminal): judge an agent's --shell against the runtime it runs in

`orca terminal create --shell` for an agent is now judged only against the runtime that agent
runs in, not also against the project's saved runtime. So --shell wsl.exe for an agent in a
\\wsl$ repo (saved as Windows host, or with no setting) runs instead of being refused.

* chore(ci): re-run checks against current main

* chore(ci): re-run checks against current main

* chore(ci): re-run checks against current main

* chore(ci): re-run checks against current main

* chore(ci): re-run checks against current main

src/main/runtime/runtime-agent-terminal-startup.test.ts

@@ -79,8 +79,8 @@ describe('host agent planner', () => {
     })
   })
 
-  // TEMPORARY parity: main's project runtime still refuses this, though the agent runs in WSL.
-  it('refuses --shell wsl.exe for an agent in a WSL-share repo set to Windows host', async () => {
+  // A `\\wsl$` cwd runs in WSL whatever the project says, so a WSL shell is what this agent gets.
+  it('applies --shell wsl.exe for an agent in a WSL-share repo set to Windows host', async () => {
     const repo = { id: 'r', path: '\\\\wsl$\\Ubuntu\\r' }
     const preference = { kind: 'windows-host' }
     const store = {
@@ -95,9 +95,7 @@ describe('host agent planner', () => {
     const opts = { startupAgent: 'claude', shellOverride: 'wsl.exe' } as const
     // oxlint-disable-next-line typescript/consistent-type-assertions -- SAFETY: as above.
     const planHost = { ...host, store: store as never }
-    const plan = resolveAgentTerminalCreateOptions(share, opts, planHost)
-    await expect(plan).rejects.toThrow(
-      "This workspace's project runs its terminals on the Windows host"
-    )
+    const launch = await resolveAgentTerminalCreateOptions(share, opts, planHost)
+    expect(launch.launchRuntime?.pty.shellOverride).toBe('wsl.exe')
   })
 })

src/main/runtime/runtime-agent-terminal-startup.ts

@@ -1,5 +1,4 @@
 import type { SessionOptionValue } from '../../shared/native-chat-session-options'
-import type { ProjectExecutionRuntimeResolution } from '../../shared/project-execution-runtime'
 import type { TuiAgent } from '../../shared/tui-agent'
 import type { AgentLaunchPreferences } from '../../shared/agent-session-host-authority'
 import {
@@ -76,24 +75,19 @@ export async function resolveAgentTerminalCreateOptions(
   const launchAgent = plannedAgent ?? opts.launchAgent
   // Before any early return: a host that cannot apply the requested shell must refuse rather than
   // spawn another one. Judged against the runtime this PTY's shell will come from.
-  const refuseShell = (projectRuntime: ProjectExecutionRuntimeResolution | undefined) =>
-    terminalShellOverrideRefusal({
-      shellOverride: opts.shellOverride,
-      connectionId: workspace.connectionId,
-      platform: process.platform,
-      projectRuntime,
-      cwd: resolveTerminalStartupCwd(workspace.path, opts.cwd) ?? workspace.path,
-      workspacePath: workspace.path
-    })
-  const judgedStore = opts.shellOverride ? store : undefined
-  // TEMPORARY parity: main's project-only runtime still refuses an agent, then the agent's own.
-  const shellRefusal =
-    refuseShell(resolveLocalProjectRuntimeForWorktreeId(judgedStore, workspace.id)) ??
-    (judgedStore && (plannedAgent || opts.launchRuntime)
-      ? refuseShell(
-          agentLaunchProjectRuntime(judgedStore, workspace, plannedAgent ?? opts.launchAgent)
-        )
-      : null)
+  const shellRefusal = terminalShellOverrideRefusal({
+    shellOverride: opts.shellOverride,
+    connectionId: workspace.connectionId,
+    platform: process.platform,
+    projectRuntime:
+      opts.shellOverride && store
+        ? plannedAgent || opts.launchRuntime
+          ? agentLaunchProjectRuntime(store, workspace, plannedAgent ?? opts.launchAgent)
+          : resolveLocalProjectRuntimeForWorktreeId(store, workspace.id)
+        : undefined,
+    cwd: resolveTerminalStartupCwd(workspace.path, opts.cwd) ?? workspace.path,
+    workspacePath: workspace.path
+  })
   if (shellRefusal) {
     throw shellRefusal
   }