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/cli/config-manager.ts

@@ -1,10 +1,9 @@
 import { existsSync, mkdirSync, readFileSync, writeFileSync, statSync } from "node:fs"
-import {
-  parseJsonc,
-  getOpenCodeConfigPaths,
-  type OpenCodeBinaryType,
-  type OpenCodeConfigPaths,
-} from "../shared"
+import { parseJsonc, getOpenCodeConfigPaths } from "../shared"
+import type {
+  OpenCodeBinaryType,
+  OpenCodeConfigPaths,
+} from "../shared/opencode-config-dir-types"
 import type { ConfigMergeResult, DetectedConfig, InstallConfig } from "./types"
 import { generateModelConfig } from "./model-fallback"
 
@@ -47,10 +46,6 @@ function getConfigJsonc(): string {
   return getConfigContext().paths.configJsonc
 }
 
-function getPackageJson(): string {
-  return getConfigContext().paths.packageJson
-}
-
 function getOmoConfig(): string {
   return getConfigContext().paths.omoConfig
 }
@@ -179,11 +174,6 @@ function isEmptyOrWhitespace(content: string): boolean {
   return content.trim().length === 0
 }
 
-function parseConfig(path: string, _isJsonc: boolean): OpenCodeConfig | null {
-  const result = parseConfigWithError(path)
-  return result.config
-}
-
 function parseConfigWithError(path: string): ParseConfigResult {
   try {
     const stat = statSync(path)