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/tools/delegate-task/skill-content-resolver.ts

@@ -0,0 +1,21 @@
+import type { GitMasterConfig, BrowserAutomationProvider } from "../../config/schema"
+import { resolveMultipleSkillsAsync } from "../../features/opencode-skill-loader/skill-content"
+import { discoverSkills } from "../../features/opencode-skill-loader"
+
+export async function resolveSkillContent(
+  skills: string[],
+  options: { gitMasterConfig?: GitMasterConfig; browserProvider?: BrowserAutomationProvider, disabledSkills?: Set<string> }
+): Promise<{ content: string | undefined; error: string | null }> {
+  if (skills.length === 0) {
+    return { content: undefined, error: null }
+  }
+
+  const { resolved, notFound } = await resolveMultipleSkillsAsync(skills, options)
+  if (notFound.length > 0) {
+    const allSkills = await discoverSkills({ includeClaudeCodePaths: true })
+    const available = allSkills.map(s => s.name).join(", ")
+    return { content: undefined, error: `Skills not found: ${notFound.join(", ")}. Available: ${available}` }
+  }
+
+  return { content: Array.from(resolved.values()).join("\n\n"), error: null }
+}