feat: add icon generator with preset-based resizing, ZIP export, and optional PWA manifest

[fclef819]

Summary

• Add a new Icon generator tool to create multiple app icon sizes from one uploaded image.
• Support preset-based size selection for PWA, Android, and iOS via buttons.
• Allow custom output size selection and manual size addition.
• Add per-file download and bulk ZIP export.
• Add optional manifest.json inclusion in ZIP (enabled only when PWA preset is active).
• Add configurable base filename for generated icons with sanitization.

UX / Behavior

• Default state starts with no preset/size selected.
• Clicking a preset button checks corresponding size checkboxes.
• Clear preset sizes unchecks preset sizes and resets manifest option.
• Include manifest.json in ZIP is disabled unless PWA preset is selected.
• ZIP filename uses sanitized base name: -icons.zip.
• Icon filenames follow: -x.png.

Technical Changes

• New tool files under src/tools/icon-generator/
  • icon-generator.vue
  • icon-generator.service.ts
  • icon-generator.service.test.ts
  • icon-generator.e2e.spec.ts
  • index.ts
• Register tool in src/tools/index.ts
• Add/extend i18n strings in:
  • locales/en.yml
• Add dependency:
  • jszip

Tests

• Unit tests added/updated for:
  • size normalization
  • preset resolution
  • draw area behavior (cover / contain)
  • base name sanitization and filename generation
  • manifest generation
• E2E spec expanded to cover:
  • default UI state
  • preset-to-checkbox behavior
  • manifest checkbox enable/disable/reset behavior
  • icon generation and ZIP download flow

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[fclef819]

Thanks for the suggestion. I reviewed the preset sizes and kept them aligned with common platform expectations: the PWA preset includes the key 192x192 and 512x512 icons used for installability, the iOS preset covers the commonly used home-screen/App Store sizes, and the Android preset is intended as a legacy bitmap launcher-icon set. Full Android adaptive icon generation (foreground/background layers and XML resources) is currently out of scope for this tool. For image processing, I intentionally kept the implementation browser-side using canvas, since this tool is designed to run fully client-side. Because of that, introducing sharp, which is primarily suited to Node/server-side image processing, would not be a good fit here. We do already use JSZip for the ZIP export path.

[sharevb]

Hi @fclef819 , I have also one in my fork : https://sharevb-it-tools.vercel.app/favicon-generator as this repo is unmaintained

And if you are interested in an up to date version of it-tools, with many improvements, new tools, and bug fixes, as this repo is almost no more maintained, I made a fork here : https://github.com/sharevb/it-tools (https://sharevb-it-tools.vercel.app/ and docker images https://github.com/sharevb/it-tools/pkgs/container/it-tools)