feat: support ~ (tilde) expansion in match_dirs paths

internal/config/config_test.go

@@ -539,3 +539,55 @@ func TestGetHost_MatchDirsIntegration(t *testing.T) {
 		t.Errorf("expected codeberg.org, got %s", host.Hostname)
 	}
 }
+
+func TestResolveHostByPath_TildeExpansion(t *testing.T) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		t.Skip("cannot determine home directory")
+	}
+
+	cfg := &Config{
+		Hosts: map[string]HostConfig{
+			"tilde.org": {
+				Hostname:  "tilde.org",
+				Token:     "t1",
+				MatchDirs: []string{"~/repos"},
+			},
+		},
+	}
+
+	got := cfg.ResolveHostByPath(filepath.Join(home, "repos", "myproject"))
+	if got != "tilde.org" {
+		t.Errorf("expected tilde.org, got %q", got)
+	}
+
+	got = cfg.ResolveHostByPath(filepath.Join(home, "other"))
+	if got != "" {
+		t.Errorf("expected empty, got %q", got)
+	}
+}
+
+func TestExpandHome(t *testing.T) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		t.Skip("cannot determine home directory")
+	}
+
+	tests := []struct {
+		input string
+		want  string
+	}{
+		{"~/repos", filepath.Join(home, "repos")},
+		{"~", home},
+		{"/absolute/path", "/absolute/path"},
+		{"relative/path", "relative/path"},
+		{"~other", "~other"}, // only ~/... is expanded, not ~user
+	}
+
+	for _, tt := range tests {
+		got := expandHome(tt.input)
+		if got != tt.want {
+			t.Errorf("expandHome(%q) = %q, want %q", tt.input, got, tt.want)
+		}
+	}
+}