Fix e2e tests on Windows: set USERPROFILE alongside HOME

os.UserHomeDir() reads USERPROFILE on Windows, not HOME.
E2E tests only set HOME, so the CLI looked at the real home
directory instead of the test fixture.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0192twUPgNxmFCpvpsBk5uqg

Author: Mapleeeeeeeeeee

cmd/cc-session/e2e_test.go

@@ -17,6 +17,15 @@ func binaryName() string {
 	return "cc-session"
 }
 
+func homeEnv(root string) []string {
+	env := os.Environ()
+	env = append(env, "HOME="+root)
+	if runtime.GOOS == "windows" {
+		env = append(env, "USERPROFILE="+root)
+	}
+	return env
+}
+
 func TestCLI_WhenSessionExists_ThenListReadContextAndAuditWorkEndToEnd(t *testing.T) {
 	root := t.TempDir()
 	bin := filepath.Join(root, binaryName())
@@ -97,7 +106,7 @@ func TestCLI_WhenSessionExists_ThenListReadContextAndAuditWorkEndToEnd(t *testin
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			cmd := exec.Command(bin, tt.args...)
-			cmd.Env = append(os.Environ(), "HOME="+root)
+			cmd.Env = homeEnv(root)
 			out, err := cmd.CombinedOutput()
 			if err != nil {
 				t.Fatalf("%s failed: %v\n%s", strings.Join(tt.args, " "), err, out)
@@ -141,7 +150,7 @@ func TestCLI_WhenSubcommandFails_ThenPrintsErrorPrefixAndExitsNonZero(t *testing
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			cmd := exec.Command(bin, tt.args...)
-			cmd.Env = append(os.Environ(), "HOME="+root)
+			cmd.Env = homeEnv(root)
 			out, err := cmd.CombinedOutput()
 
 			var exitErr *exec.ExitError