Remove Phoenix and notebooks (Phase 6)

Complete the final removal phase by deleting Juno and analytical schema integration, residual Phoenix and notebook contracts, configuration, localization, and assets. Preserve CloudShell behavior and numeric compatibility contracts while cleaning stale UI terminology.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 8730a951-831c-4cc2-9c91-83e237683d46

src/Contracts/ViewModels.ts

@@ -136,8 +136,6 @@ export interface CollectionBase extends TreeNode {
 export interface Collection extends CollectionBase {
   defaultTtl: ko.Observable<number>;
   analyticalStorageTtl: ko.Observable<number>;
-  schema?: DataModels.ISchema;
-  requestSchema?: () => void;
   vectorEmbeddingPolicy: ko.Observable<DataModels.VectorEmbeddingPolicy>;
   fullTextPolicy: ko.Observable<DataModels.FullTextPolicy>;
   dataMaskingPolicy: ko.Observable<DataModels.DataMaskingPolicy>;
@@ -388,16 +386,10 @@ export enum CollectionTabKind {
   MongoShell = 10,
   DatabaseSettings = 11,
   Conflicts = 12,
-  Notebook = 13 /* Deprecated */,
   Terminal = 14,
-  NotebookV2 = 15,
   SparkMasterTab = 16 /* Deprecated */,
-  Gallery = 17 /* Deprecated */,
-  NotebookViewer = 18,
-  Schema = 19,
   CollectionSettingsV2 = 20,
   DatabaseSettingsV2 = 21,
-  SchemaAnalyzer = 22,
 }
 
 export enum TerminalKind {