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/features/builtin-commands/commands.ts

@@ -17,17 +17,28 @@ $ARGUMENTS
 </user-request>`,
     argumentHint: "[--create-new] [--max-depth=N]",
   },
-  "ralph-loop": {
-    description: "(builtin) Start self-referential development loop until completion",
-    template: `<command-instruction>
+   "ralph-loop": {
+     description: "(builtin) Start self-referential development loop until completion",
+     template: `<command-instruction>
 ${RALPH_LOOP_TEMPLATE}
 </command-instruction>
 
 <user-task>
 $ARGUMENTS
 </user-task>`,
-    argumentHint: '"task description" [--completion-promise=TEXT] [--max-iterations=N]',
-  },
+     argumentHint: '"task description" [--completion-promise=TEXT] [--max-iterations=N]',
+   },
+   "ulw-loop": {
+     description: "(builtin) Start ultrawork loop - continues until completion with ultrawork mode",
+     template: `<command-instruction>
+${RALPH_LOOP_TEMPLATE}
+</command-instruction>
+
+<user-task>
+$ARGUMENTS
+</user-task>`,
+     argumentHint: '"task description" [--completion-promise=TEXT] [--max-iterations=N]',
+   },
   "cancel-ralph": {
     description: "(builtin) Cancel active Ralph Loop",
     template: `<command-instruction>

src/features/builtin-commands/types.ts

@@ -1,6 +1,6 @@
 import type { CommandDefinition } from "../claude-code-command-loader"
 
-export type BuiltinCommandName = "init-deep" | "ralph-loop" | "cancel-ralph" | "refactor" | "start-work"
+export type BuiltinCommandName = "init-deep" | "ralph-loop" | "cancel-ralph" | "ulw-loop" | "refactor" | "start-work"
 
 export interface BuiltinCommandConfig {
   disabled_commands?: BuiltinCommandName[]