feat: Implement module-specific accent colors and enhance theme integration

This commit introduces module-specific accent colors and further integrates
the primary and secondary theme colors throughout the application's UI components.

Key features:
- Four new customizable accent colors, one for each main module:
    - Empleados
    - Tareas
    - Planillas
    - Asistencias
- These accent colors are configurable in the Settings view and persist in local storage.
- Broader application of global primary and secondary colors to common UI elements like navigation bars.
- Module-specific components now use their designated accent color for key visual elements (e.g., primary buttons, titles, icons, borders), providing better visual differentiation between modules.

Changes include:
- Extended `ui/src/stores/useUi.js` to manage state for the four new module accent colors, including actions and local storage persistence.
- Added a "Module Accent Colors" section with color pickers to `ui/src/views/SettingsView.vue`.
- Updated `ui/src/App.vue` to expose these module accent colors as CSS variables (e.g., `--accent-color-empleados`).
- Systematically updated styles in general UI components (`ui/src/components/ui/`) and all module-specific components (`ui/src/components/{module}/` and `ui/src/views/{module}/`) to utilize the new global and module-specific theme colors.
- Updated unit tests for `useUi.js` and component tests for `SettingsView.vue` to cover the new accent color functionality. A bug related to color input event handling in `SettingsView.vue` was identified and fixed during this process.

This enhancement provides a more visually distinct and customizable experience across different sections of the application.

ui/package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "dev": "vite",
     "build": "vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest"
   },
   "dependencies": {
     "@tailwindcss/vite": "^4.1.7",
@@ -17,9 +18,12 @@
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.2.2",
+    "@vue/test-utils": "^2.4.5",
     "autoprefixer": "^10.4.21",
+    "jsdom": "^24.0.0",
     "postcss": "^8.5.3",
     "tailwindcss": "^4.1.7",
-    "vite": "^6.3.1"
+    "vite": "^6.3.1",
+    "vitest": "^1.3.0"
   }
 }