fix: handle Windows drive-letter paths across the codebase (#148)

* Add metrics collection and terminal performance tests

* fix: handle Windows drive-letter paths across the codebase

Windows paths like C:\Users\foo\project were broken in multiple places:
- agent-storage slugified D:\MyProject as D:-MyProject (illegal colon)
- terminal-manager rejected all non-/ paths as relative
- bootstrap parser misparsed drive colons as TCP host:port
- daemon/client connection helpers misclassified Windows paths
- CLI cwd filtering used hardcoded / separators
- checkout-git worktree detection used hardcoded / in path checks
- worktree archive used split("/").pop() instead of path.basename()

All path helpers now normalize separators and handle Windows
drive letters with case-insensitive comparison where needed.

packages/server/src/terminal/terminal-manager.ts

@@ -1,5 +1,5 @@
 import { createTerminal, type TerminalSession } from "./terminal.js";
-import { resolve, sep } from "node:path";
+import { resolve, sep, win32, posix } from "node:path";
 
 export interface TerminalListItem {
   id: string;
@@ -37,7 +37,7 @@ export function createTerminalManager(): TerminalManager {
   const defaultEnvByRootCwd = new Map<string, Record<string, string>>();
 
   function assertAbsolutePath(cwd: string): void {
-    if (!cwd.startsWith("/")) {
+    if (!posix.isAbsolute(cwd) && !win32.isAbsolute(cwd)) {
       throw new Error("cwd must be absolute path");
     }
   }