refactor(cli): centralize worktree ls path resolution

What I changed:\n- Refactored worktree path handling in worktree ls into focused helpers: resolvePaseoHomePath, resolvePaseoWorktreesDir, and isAgentInManagedWorktree.\n- Switched worktree name extraction to node:path basename for clearer intent and path handling.\n- Added a focused regression test (20-worktree-ls-paths.test.ts) covering explicit PASEO_HOME and fallback home resolution behavior.\n\nReasoning:\n- The prior implementation repeated path derivation inline inside the agent loop, mixed decision logic with mapping, and relied on string concatenation for filesystem boundaries.\n- Extracting this logic reduces cognitive load, keeps policy in one place, and makes behavior directly testable without daemon dependencies.\n\nVerification:\n- npx tsx packages/cli/tests/20-worktree-ls-paths.test.ts\n- npx tsx packages/cli/tests/14-worktree.test.ts\n- npm run typecheck (all workspaces)\n\nNotes for next agent:\n- Similar inline PASEO_HOME/path derivation still exists in other CLI commands; these helpers can be reused to continue consistency work.\n- No behavior change intended for command output or error semantics; this was a structural-only refactor aligned with refactor-skill constraints.

packages/cli/src/commands/worktree/ls.ts

@@ -1,4 +1,6 @@
 import type { Command } from 'commander'
+import { homedir } from 'node:os'
+import { basename, join, sep } from 'node:path'
 import { connectToDaemon, getDaemonHost } from '../../utils/client.js'
 import type { CommandOptions, ListResult, OutputSchema, CommandError } from '../../output/index.js'
 
@@ -21,9 +23,20 @@ function shortenPath(path: string): string {
 
 /** Extract worktree name from path */
 function extractWorktreeName(path: string): string {
-  // ~/.paseo/worktrees/<repo>/<name> -> name
-  const parts = path.split('/')
-  return parts[parts.length - 1] ?? path
+  return basename(path)
+}
+
+export function resolvePaseoHomePath(): string {
+  return process.env.PASEO_HOME ?? join(homedir(), '.paseo')
+}
+
+export function resolvePaseoWorktreesDir(): string {
+  return join(resolvePaseoHomePath(), 'worktrees')
+}
+
+function isAgentInManagedWorktree(agentCwd: string): boolean {
+  const worktreesDir = resolvePaseoWorktreesDir()
+  return agentCwd === worktreesDir || agentCwd.startsWith(worktreesDir + sep)
 }
 
 /** Schema for worktree ls output */
@@ -81,10 +94,7 @@ export async function runLsCommand(
     // Build a map of worktree paths to agent IDs
     const worktreeAgentMap = new Map<string, string>()
     for (const agent of agents) {
-      // Check if agent cwd is under ~/.paseo/worktrees/
-      const paseoHome = process.env.PASEO_HOME ?? (process.env.HOME + '/.paseo')
-      const worktreesDir = paseoHome + '/worktrees/'
-      if (agent.cwd.startsWith(worktreesDir)) {
+      if (isAgentInManagedWorktree(agent.cwd)) {
         worktreeAgentMap.set(agent.cwd, agent.id.slice(0, 7))
       }
     }