fix(igx-ts): resolve lint errors in Angular project templates

[Copilot]

• Fix no-useless-assignment in fintech-grid/data/financialData.ts
• Fix no-useless-assignment in fintech-tree-grid/assets/financialData.ts
• Fix no-useless-assignment in fintech-grid/__filePrefix__.ts
• Fix no-useless-assignment in fintech-tree-grid/__filePrefix__.ts
• Fix @typescript-eslint/no-empty-function + @typescript-eslint/no-unused-vars in local-storage.ts
• Fix @typescript-eslint/no-unused-vars in jwt-util.ts (bare catch) and @typescript-eslint/no-empty-object-type (reverted object → {} with eslint-disable comment to keep spec compatibility)
• Fix @typescript-eslint/consistent-generic-constructors in external-auth.ts
• Fix @typescript-eslint/no-unused-vars + @typescript-eslint/no-empty-function in facebook-provider.ts
• Fix @angular-eslint/component-selector in generate/__filePrefix__.ts
• Update eslint.config.js with argsIgnorePattern: '^_' for unused vars, and a spec file override disabling @typescript-eslint/no-empty-function and @typescript-eslint/class-literal-property-style for test files
• Fix prefer-const in services.spec.ts - consolidate mockLocalStorage declaration and assignment

[Hristo313]

@copilot Fix the test and lint errors for the authentication igx-ts template

[Copilot]

@copilot Fix the test and lint errors for the authentication igx-ts template

Fixed in commit c7b24a2. The changes address:

• eslint.config.js: Added a **/*.spec.ts override disabling @typescript-eslint/no-empty-function and @typescript-eslint/class-literal-property-style — test files legitimately use empty mock stubs and spy-compatible getters
• jwt-util.ts: Reverted input: object back to input: {} with an eslint-disable comment — the object type broke the spec that calls encodeBase64Url with a string argument
• services.spec.ts: Fixed prefer-const by merging the let mockLocalStorage declaration with its assignment into a single const mockLocalStorage = { ... }

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[coveralls]

coverage: 86.3%. remained the same — copilot/fix-lint-errors-igx-ts-templates into master

[Copilot]

Pull request overview

This PR focuses on removing ESLint violations in the igx-ts Angular templates (mostly unused vars / empty functions / selector conventions) so newly generated projects template-lint cleanly.

Changes:

• Refactors template/sample code to eliminate no-useless-assignment, prefer-const, and unused variable lint errors.
• Adjusts template implementations to satisfy TypeScript ESLint rules (e.g., optional catch binding, generic Map construction).
• Updates the base template ESLint flat config to ignore unused args prefixed with _ and relax a couple of test-only rules for *.spec.ts.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/igx-templates/igx-ts/projects/side-nav-auth/files/src/app/authentication/services/services.spec.ts	Consolidates mockLocalStorage into a single const to satisfy prefer-const / remove useless assignment.
packages/igx-templates/igx-ts/projects/side-nav-auth/files/src/app/authentication/services/local-storage.ts	Updates fallback Storage implementation to avoid unused-arg lint and disables no-empty-function where appropriate.
packages/igx-templates/igx-ts/projects/side-nav-auth/files/src/app/authentication/services/jwt-util.ts	Removes unused catch binding and adds a targeted eslint-disable for {} typing.
packages/igx-templates/igx-ts/projects/side-nav-auth/files/src/app/authentication/services/external-auth.ts	Updates Map construction to satisfy consistent generic constructor style.
packages/igx-templates/igx-ts/projects/side-nav-auth/files/src/app/authentication/providers/facebook-provider.ts	Tweaks FB.logout callback to address unused vars / empty function lint concerns.
packages/igx-templates/igx-ts/projects/_base/files/eslint.config.js	Adds _ args ignore pattern and test-file rule overrides in the base flat ESLint config.
packages/igx-templates/igx-ts/generate/files/src/app/path/filePrefix.ts	Updates generated component selector to match the enforced app- prefix convention.
packages/igx-templates/igx-ts/custom-templates/fintech-tree-grid/files/src/app/path/assets/financialData.ts	Removes useless assignment in generateNewPrice by switching to a direct const initialization.
packages/igx-templates/igx-ts/custom-templates/fintech-tree-grid/files/src/app/path/filePrefix.ts	Removes useless assignment in price calculation by initializing newPrice at first assignment.
packages/igx-templates/igx-ts/custom-templates/fintech-grid/files/src/app/path/data/financialData.ts	Removes useless assignment in generateNewPrice by switching to a direct const initialization.
packages/igx-templates/igx-ts/custom-templates/fintech-grid/files/src/app/path/filePrefix.ts	Removes useless assignment in price calculation by initializing newPrice at first assignment.

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