Updates some of the docs for mobile (#167)

Author: shanerbaner82

resources/views/docs/mobile/1/the-basics/app-assets.md

@@ -0,0 +1,69 @@
+---
+title: App Assets
+order: 400
+---
+
+## Customizing Your App Icon
+
+NativePHP makes it easy to apply a custom app icon to your iOS and Android builds.
+
+### Step 1: Provide Your Icon
+
+Place a single high-resolution icon file at: `public/icon.png`
+
+
+### Requirements:
+- Format: PNG
+- Size: 1024 × 1024 pixels
+- Shape: Square
+- Background: Transparent or solid — your choice
+
+Note: This image will be automatically resized for all Android densities and used as the base iOS app icon.
+
+---
+
+## Compiling CSS and JavaScript
+
+Your device behaves like a server, so assets must be compiled before deployment.
+
+To ensure your latest styles and JavaScript are included, run: `npm run build` before running: `php artisan native:run`.
+
+If you’ve made changes to your frontend, this step is required to see them reflected in the app.
+
+---
+
+## Using the --watch Flag (Experimental)
+
+NativePHP includes an experimental `--watch` flag that enables automatic file syncing while the app is running:
+
+php artisan native:run --watch
+
+This is useful during development for quickly testing changes without rebuilding the entire app.
+
+### Caveats
+
+- This feature is currently best suited for **Blade** and **Livewire** applications.
+- It does **not** currently detect or sync **compiled frontend assets**, such as those built with Vite or used by **Inertia.js**.
+- If you're working with a JavaScript-heavy stack (Vue, React, Inertia), you should continue using `npm run build` before launching the app with `native:run`.
+
+### Recommendation
+
+Use `--watch` when you're iterating on Blade views or Livewire components. For all other use cases, treat this flag as experimental and optional.
+
+---
+
+## Optional: Installing with ICU Support
+
+By default, NativePHP installs a smaller PHP runtime without ICU (International Components for Unicode) to keep app size minimal.
+
+If your Laravel app uses features that rely on `intl` (such as number formatting, localized date handling, or advanced string collation), you’ll need ICU support enabled.
+
+To include ICU during installation, select it when running: `php artisan native:install`.
+
+This will install a version of PHP with full ICU support. Note that it increases the PHP binary size significantly (typically from ~16MB to ~44MB).
+
+**Important:** If you plan to use [Filament](https://filamentphp.com/) in your app, you must enable this option. Filament relies on the `intl` extension for formatting and localization features.
+
+
+
+