Set up comprehensive frontend testing infrastructure

- Install Jest for unit testing with React Testing Library
- Install Playwright for end-to-end testing
- Configure Jest with proper TypeScript support and module mapping
- Create test setup files and utilities for both unit and e2e tests

Components:
* Jest configuration with coverage thresholds
* Playwright configuration with browser automation
* Unit tests for LoginForm, AuthContext, and useSocketIO hook
* E2E tests for authentication, dashboard, and agents workflows
* GitHub Actions workflow for automated testing
* Mock data and API utilities for consistent testing
* Test documentation with best practices

Testing features:
- Unit tests with 70% coverage threshold
- E2E tests with API mocking and user journey testing
- CI/CD integration for automated test runs
- Cross-browser testing support with Playwright
- Authentication system testing end-to-end

🚀 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/node_modules/@csstools/css-calc/dist/index.d.ts

@@ -0,0 +1,71 @@
+import type { ComponentValue } from '@csstools/css-parser-algorithms';
+import type { TokenDimension } from '@csstools/css-tokenizer';
+import type { TokenNumber } from '@csstools/css-tokenizer';
+import type { TokenPercentage } from '@csstools/css-tokenizer';
+
+export declare function calc(css: string, options?: conversionOptions): string;
+
+export declare function calcFromComponentValues(componentValuesList: Array<Array<ComponentValue>>, options?: conversionOptions): Array<Array<ComponentValue>>;
+
+export declare type conversionOptions = {
+    /**
+     * Pass global values as a map of key value pairs.
+     */
+    globals?: GlobalsWithStrings;
+    /**
+     * The default precision is fairly high.
+     * It aims to be high enough to make rounding unnoticeable in the browser.
+     * You can set it to a lower number to suite your needs.
+     */
+    precision?: number;
+    /**
+     * By default this package will try to preserve units.
+     * The heuristic to do this is very simplistic.
+     * We take the first unit we encounter and try to convert other dimensions to that unit.
+     *
+     * This better matches what users expect from a CSS dev tool.
+     *
+     * If you want to have outputs that are closes to CSS serialized values you can set `true`.
+     */
+    toCanonicalUnits?: boolean;
+    /**
+     * Convert NaN, Infinity, ... into standard representable values.
+     */
+    censorIntoStandardRepresentableValues?: boolean;
+    /**
+     * Some percentages resolve against other values and might be negative or positive depending on context.
+     * Raw percentages are more likely to be safe to simplify outside of a browser context
+     *
+     * @see https://drafts.csswg.org/css-values-4/#calc-simplification
+     */
+    rawPercentages?: boolean;
+    /**
+     * The values used to generate random value cache keys.
+     */
+    randomCaching?: {
+        /**
+         * The name of the property the random function is used in.
+         */
+        propertyName: string;
+        /**
+         * N is the index of the random function among other random functions in the same property value.
+         */
+        propertyN: number;
+        /**
+         * An element ID identifying the element the style is being applied to.
+         * When omitted any `random()` call will not be computed.
+         */
+        elementID: string;
+        /**
+         * A document ID identifying the Document the styles are from.
+         * When omitted any `random()` call will not be computed.
+         */
+        documentID: string;
+    };
+};
+
+export declare type GlobalsWithStrings = Map<string, TokenDimension | TokenNumber | TokenPercentage | string>;
+
+export declare const mathFunctionNames: Set<string>;
+
+export { }