Initial commit: Aeroflot Flights Web - Angular 12 baseline

- Angular 12 application with PrimeNG components
- 5 existing Cypress e2e test suites
- SCSS styling with BEM naming convention
- i18n support (10 languages)
- Leaflet map integration
- Complete component hierarchy and routing structure

This baseline will be used for Angular → React migration.

ClientApp/node_modules/stackframe/stackframe.d.ts

@@ -0,0 +1,74 @@
+// Type definitions for StackFrame v1.3
+// Project: https://github.com/stacktracejs/stackframe
+// Definitions by: Eric Wendelin <https://www.eriwen.com>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export as namespace StackFrame;  // global for non-module UMD users
+
+export = StackFrame;
+
+declare namespace StackFrame {
+    export interface StackFrameOptions {
+        isConstructor?: boolean;
+        isEval?: boolean;
+        isNative?: boolean;
+        isToplevel?: boolean;
+        columnNumber?: number;
+        lineNumber?: number;
+        fileName?: string;
+        functionName?: string;
+        source?: string;
+        args?: any[];
+        evalOrigin?: StackFrame;
+    }
+}
+
+declare class StackFrame {
+    constructor(obj: StackFrame.StackFrameOptions);
+
+    args?: any[];
+    getArgs(): any[] | undefined;
+    setArgs(args: any[]): void;
+
+    evalOrigin?: StackFrame;
+    getEvalOrigin(): StackFrame | undefined;
+    setEvalOrigin(stackframe: StackFrame): void;
+
+    isConstructor?: boolean;
+    getIsConstructor(): boolean | undefined;
+    setIsConstructor(isConstructor: boolean): void;
+
+    isEval?: boolean;
+    getIsEval(): boolean | undefined;
+    setIsEval(isEval: boolean): void;
+
+    isNative?: boolean;
+    getIsNative(): boolean | undefined;
+    setIsNative(isNative: boolean): void;
+
+    isToplevel?: boolean;
+    getIsToplevel(): boolean | undefined;
+    setIsToplevel(isToplevel: boolean): void;
+
+    columnNumber?: number;
+    getColumnNumber(): number | undefined;
+    setColumnNumber(columnNumber: number): void;
+
+    lineNumber?: number;
+    getLineNumber(): number | undefined;
+    setLineNumber(lineNumber: number): void;
+
+    fileName?: string;
+    getFileName(): string | undefined;
+    setFileName(fileName: string): void;
+
+    functionName?: string;
+    getFunctionName(): string | undefined;
+    setFunctionName(functionName: string): void;
+
+    source?: string;
+    getSource(): string | undefined;
+    setSource(source: string): void;
+
+    toString(): string;
+}