Fix Prettier formatting regression and Astro type-check errors

`Render Modal as real markup` (#2742) reformatted ~140 files back to
tabs/semicolons, breaking the Prettier config added by the Astro
quality gates (#2749). Re-run prettier --write to restore it, and fix
the type errors it had been masking: HTMLElement casts and `this`
typing in ChangePasswordModalContent/ConfirmDeleteModalContent
scripts, plain-JS syntax in the inline-injected progress.astro script,
narrowed prop unions in Button/Check/Spinner, nullable icon svg casts
in Icons/Rating, and a duplicate firstLetters/invalid `placeholder`
attribute in Select.astro. Also fix shared/vitest.config.mts's stale
`astro/lib/**/*.test.ts` include glob left over from the shared source
restructure, which made `pnpm test` report zero test files.

shared/ui/AvatarUpload.astro

@@ -1,21 +1,16 @@
 ---
-import Icon from './Icon.astro';
+import Icon from './Icon.astro'
 
 interface Props {
-	class?: string;
-	size?: string;
+  class?: string
+  size?: string
 }
 
-const { class: className, size } = Astro.props;
+const { class: className, size } = Astro.props
 
-const classes = [
-	'avatar',
-	'avatar-upload',
-	className,
-	size && `avatar-${size}`,
-]
+const classes = ['avatar', 'avatar-upload', className, size && `avatar-${size}`]
 ---
 
 <a href="#" class:list={classes}>
-	<Icon name="plus" />
+  <Icon name="plus" />
 </a>