refactor: wave 1 - extract leaf modules, rename catch-all files, split index.ts hooks

- Split 25+ index.ts files into hook.ts + extracted modules
- Rename all catch-all utils.ts/helpers.ts to domain-specific names
- Split src/tools/lsp/ into ~15 focused modules
- Split src/tools/delegate-task/ into ~18 focused modules
- Separate shared types from implementation
- 155 files changed, 60+ new files created
- All typecheck clean, 61 tests pass

src/hooks/keyword-detector/ultrawork/index.ts

@@ -7,13 +7,13 @@
  * 3. Default (Claude, etc.) → default.ts (optimized for Claude series)
  */
 
-export { isPlannerAgent, isGptModel, getUltraworkSource } from "./utils"
-export type { UltraworkSource } from "./utils"
+export { isPlannerAgent, isGptModel, getUltraworkSource } from "./source-detector"
+export type { UltraworkSource } from "./source-detector"
 export { ULTRAWORK_PLANNER_SECTION, getPlannerUltraworkMessage } from "./planner"
 export { ULTRAWORK_GPT_MESSAGE, getGptUltraworkMessage } from "./gpt5.2"
 export { ULTRAWORK_DEFAULT_MESSAGE, getDefaultUltraworkMessage } from "./default"
 
-import { getUltraworkSource } from "./utils"
+import { getUltraworkSource } from "./source-detector"
 import { getPlannerUltraworkMessage } from "./planner"
 import { getGptUltraworkMessage } from "./gpt5.2"
 import { getDefaultUltraworkMessage } from "./default"

src/hooks/keyword-detector/ultrawork/source-detector.ts

@@ -36,7 +36,10 @@ export type UltraworkSource = "planner" | "gpt" | "default"
 /**
  * Determines which ultrawork message source to use.
  */
-export function getUltraworkSource(agentName?: string, modelID?: string): UltraworkSource {
+export function getUltraworkSource(
+  agentName?: string,
+  modelID?: string
+): UltraworkSource {
   // Priority 1: Planner agents
   if (isPlannerAgent(agentName)) {
     return "planner"