Add full shell, replaceable Omics adapter and bilingual interaction

Implement approved specification #32 and tickets #33-#37. Keep host authentication server-verified and pin session interaction language. Compile scoped base selectors for browser compatibility and retain full gutters during CSS pruning.

tools/tht/internal/modelprojection/projection_test.go

@@ -24,8 +24,8 @@ func TestRenderProducesDeterministicCatalogPiAndComposeProjections(t *testing.T)
 	if err != nil {
 		t.Fatalf("Render() second error = %v", err)
 	}
-	if len(first) != 4 {
-		t.Fatalf("artifact count = %d, want 4", len(first))
+	if len(first) != 5 {
+		t.Fatalf("artifact count = %d, want 5", len(first))
 	}
 	for path, contents := range first {
 		if !bytes.Equal(contents, second[path]) {
@@ -133,6 +133,7 @@ func TestGenerateDoesNotReplaceUnchangedProjection(t *testing.T) {
 		installation.GeneratedModelCatalogPath(),
 		installation.GeneratedPiModelsPath(),
 		installation.GeneratedPiSettingsPath(),
+		installation.GeneratedFrontendConfigPath(),
 		installation.ModelProjectionComposePath(),
 	}
 	before := make(map[string]os.FileInfo, len(paths))
@@ -174,7 +175,7 @@ func TestGenerateRestoresWholePreviousGenerationWhenPublishFails(t *testing.T) {
 		t.Fatalf("Generate() initial error = %v", err)
 	}
 	before := make(map[string][]byte)
-	for _, path := range []string{CatalogFile, PiModelsFile, PiSettingsFile, ComposeFile} {
+	for _, path := range []string{CatalogFile, PiModelsFile, PiSettingsFile, ComposeFile, FrontendConfigFile} {
 		contents, err := os.ReadFile(filepath.Join(installation.GeneratedDirectory(), filepath.FromSlash(path)))
 		if err != nil {
 			t.Fatal(err)