fix: wire control-ui steer and redirect (#54625) (thanks @fuller-stack-dev)

* feat(ui): wire /steer slash command to sessions.steer RPC

* feat(ui): wire /steer (soft inject) and /redirect (hard restart) slash commands

* test: use generic subagent names in steer/redirect tests

* fix(ui): exempt steer/redirect from busy-queue and guard sessions.list failures

* fix(ui): skip 'all' wildcard in steer/redirect target resolution

* test: register slash-command-executor test in vitest config

* fix(ui): restrict steer target to subagent keys and active sessions

Address two review issues in resolveSteerTarget:

P2: Replace resolveKillTargets with a dedicated resolveSteerSubagent
that matches only on subagent key suffix or label, not agent id.
This prevents false-positive targeting when the first word collides
with an agent id (e.g. "/steer main refine plan").

P1: Filter out ended sessions (endedAt set) so stale subagents with
reused names are not targeted.

* fix(ui): use shared generateUUID for steer idempotency key

* fix: restore telegram test to upstream state (merge artifact)

* fix(ui): track redirected run so Abort works and concurrent sends are blocked

* fix(ui): skip run tracking when /redirect targets a subagent session

* fix(ui): block idle steer runs

* fix(ui): dedupe steer slash command

* fix(ui): show pending steer state

* fix: wire control-ui steer and redirect (#54625) (thanks @fuller-stack-dev)

* fix: tighten steer target resolution (#54625) (thanks @fuller-stack-dev)

---------

Co-authored-by: Ayaan Zaidi <hi@obviy.us>

vitest.config.ts

@@ -88,6 +88,7 @@ export default defineConfig({
       "ui/src/ui/controllers/sessions.test.ts",
       "ui/src/ui/views/sessions.test.ts",
       "ui/src/ui/app-gateway.sessions.node.test.ts",
+      "ui/src/ui/chat/slash-command-executor.node.test.ts",
     ],
     setupFiles: ["test/setup.ts"],
     exclude: [