Add /ulw-loop command for ultrawork mode loop (#867)

* feat(ralph-loop): add ultrawork field to RalphLoopState

* feat(ralph-loop): persist ultrawork field in storage

* feat(ralph-loop): accept ultrawork option in startLoop

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* feat(ralph-loop): prepend ultrawork keyword when mode active

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* feat(ralph-loop): custom toast for ultrawork mode

* feat(ralph-loop): add /ulw-loop command for ultrawork mode

* fix(ralph-loop): add non-null assertion for type safety

* fix(ralph-loop): mirror argument parsing in ulw-loop handler

- Parse quoted prompts and strip flags from task text
- Support --max-iterations and --completion-promise options
- Add default prompt for empty input
- Fixes behavior inconsistency with /ralph-loop

---------

Co-authored-by: justsisyphus <sisyphus-dev-ai@users.noreply.github.com>
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/auto-slash-command/constants.ts

@@ -8,4 +8,5 @@ export const SLASH_COMMAND_PATTERN = /^\/([a-zA-Z][\w-]*)\s*(.*)/
 export const EXCLUDED_COMMANDS = new Set([
   "ralph-loop",
   "cancel-ralph",
+  "ulw-loop",
 ])