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/config/installation.go

@@ -40,6 +40,7 @@ type descriptor struct {
 	WorkspaceRepository workspaceRepositoryDescriptor `yaml:"workspaceRepository"`
 	Authentication      authenticationDescriptor      `yaml:"authentication"`
 	ModelCatalog        ModelCatalog                  `yaml:"modelCatalog"`
+	Shell               Shell                         `yaml:"shell"`
 	Overrides           []string                      `yaml:"overrides"`
 }
 
@@ -91,6 +92,7 @@ type Installation struct {
 	WorkspaceRepository WorkspaceRepository
 	Authentication      Authentication
 	ModelCatalog        ModelCatalog
+	Shell               Shell
 	Overrides           []string
 }
 
@@ -128,6 +130,9 @@ func Load(path string) (Installation, error) {
 	if err := raw.ModelCatalog.NormalizeDefaults(); err != nil {
 		return Installation{}, err
 	}
+	if err := raw.Shell.NormalizeDefaults(); err != nil {
+		return Installation{}, err
+	}
 
 	if raw.SchemaVersion != 2 {
 		return Installation{}, errors.New("migration_required: installation schemaVersion must be 2")
@@ -176,6 +181,7 @@ func Load(path string) (Installation, error) {
 		},
 		Authentication: authentication,
 		ModelCatalog:   raw.ModelCatalog,
+		Shell:          raw.Shell,
 		Overrides:      make([]string, 0, len(raw.Overrides)),
 	}
 	values, err := installation.environmentValues()
@@ -435,7 +441,7 @@ func (i Installation) ComposeFiles() []string {
 	return files
 }
 
-// GeneratedDirectory contains disposable runtime adapters derived from modelCatalog.
+// GeneratedDirectory contains disposable model and public frontend runtime projections.
 func (i Installation) GeneratedDirectory() string {
 	return filepath.Join(filepath.Dir(i.Path), "generated")
 }
@@ -452,6 +458,10 @@ func (i Installation) GeneratedPiSettingsPath() string {
 	return filepath.Join(i.GeneratedDirectory(), "pi", "settings.json")
 }
 
+func (i Installation) GeneratedFrontendConfigPath() string {
+	return filepath.Join(i.GeneratedDirectory(), "frontend", "config.js")
+}
+
 func (i Installation) ModelProjectionComposePath() string {
 	return filepath.Join(i.GeneratedDirectory(), "compose.models.yaml")
 }