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/lsp/server-resolution.ts

@@ -0,0 +1,109 @@
+import { BUILTIN_SERVERS, LSP_INSTALL_HINTS } from "./constants"
+import { getConfigPaths, getMergedServers, loadAllConfigs } from "./server-config-loader"
+import { isServerInstalled } from "./server-installation"
+import type { ServerLookupResult } from "./types"
+
+export function findServerForExtension(ext: string): ServerLookupResult {
+  const servers = getMergedServers()
+
+  for (const server of servers) {
+    if (server.extensions.includes(ext) && isServerInstalled(server.command)) {
+      return {
+        status: "found",
+        server: {
+          id: server.id,
+          command: server.command,
+          extensions: server.extensions,
+          priority: server.priority,
+          env: server.env,
+          initialization: server.initialization,
+        },
+      }
+    }
+  }
+
+  for (const server of servers) {
+    if (server.extensions.includes(ext)) {
+      const installHint = LSP_INSTALL_HINTS[server.id] || `Install '${server.command[0]}' and ensure it's in your PATH`
+      return {
+        status: "not_installed",
+        server: {
+          id: server.id,
+          command: server.command,
+          extensions: server.extensions,
+        },
+        installHint,
+      }
+    }
+  }
+
+  const availableServers = [...new Set(servers.map((s) => s.id))]
+  return {
+    status: "not_configured",
+    extension: ext,
+    availableServers,
+  }
+}
+
+export function getAllServers(): Array<{
+  id: string
+  installed: boolean
+  extensions: string[]
+  disabled: boolean
+  source: string
+  priority: number
+}> {
+  const configs = loadAllConfigs()
+  const servers = getMergedServers()
+  const disabled = new Set<string>()
+
+  for (const config of configs.values()) {
+    if (!config.lsp) continue
+    for (const [id, entry] of Object.entries(config.lsp)) {
+      if (entry.disabled) disabled.add(id)
+    }
+  }
+
+  const result: Array<{
+    id: string
+    installed: boolean
+    extensions: string[]
+    disabled: boolean
+    source: string
+    priority: number
+  }> = []
+
+  const seen = new Set<string>()
+
+  for (const server of servers) {
+    if (seen.has(server.id)) continue
+    result.push({
+      id: server.id,
+      installed: isServerInstalled(server.command),
+      extensions: server.extensions,
+      disabled: false,
+      source: server.source,
+      priority: server.priority,
+    })
+    seen.add(server.id)
+  }
+
+  for (const id of disabled) {
+    if (seen.has(id)) continue
+    const builtin = BUILTIN_SERVERS[id]
+    result.push({
+      id,
+      installed: builtin ? isServerInstalled(builtin.command) : false,
+      extensions: builtin?.extensions || [],
+      disabled: true,
+      source: "disabled",
+      priority: 0,
+    })
+  }
+
+  return result
+}
+
+export function getConfigPaths_(): { project: string; user: string; opencode: string } {
+  return getConfigPaths()
+}