Roll out refined-minimal styling and product thumbnails across pages

Apply the dashboard's refined direction to the rest of the app:
- Items: page-title header, product thumbnail (best-price image) beside
  each item name via the shared thumbSm component.
- Results: refined headers; per-item and global tables get standardized
  thumbnails (global table gains a thumbnail column).
- Settings: page-title + subtitle, section headings restyled.
- Item form: page-title header.
- Shared: thumbSm component + compact thumbnail CSS variant.

templates/settings.templ

@@ -56,10 +56,13 @@ templ credStatus(d SettingsData, key string) {
 
 templ settingsBody(d SettingsData) {
 	<div class="space-y-8 max-w-3xl">
-		<h1 class="text-3xl font-semibold">Settings</h1>
+		<div>
+			<h1 class="v-page-title">Settings</h1>
+			<p class="v-page-sub">Credentials, budget, notifications, and users</p>
+		</div>
 
 		<section class="v-card p-6">
-			<h2 class="font-semibold mb-4">Apify, eBay and Ntfy</h2>
+			<h2 class="v-section-title mb-4">Apify, eBay and Ntfy</h2>
 			<form method="post" action="/settings" class="space-y-4">
 				@CSRFInput(d.CSRFToken)
 				<div>
@@ -169,7 +172,7 @@ templ settingsBody(d SettingsData) {
 		</section>
 
 		<section class="v-card p-6">
-			<h2 class="font-semibold mb-4">Change Password</h2>
+			<h2 class="v-section-title mb-4">Change Password</h2>
 			if d.PasswordError != "" {
 				<div class="v-flash-error">{ d.PasswordError }</div>
 			}
@@ -195,7 +198,7 @@ templ settingsBody(d SettingsData) {
 		</section>
 
 		<section class="v-card p-6">
-			<h2 class="font-semibold mb-4">Email Notifications</h2>
+			<h2 class="v-section-title mb-4">Email Notifications</h2>
 			if d.EmailError != "" {
 				<div class="v-flash-error">{ d.EmailError }</div>
 			}
@@ -228,7 +231,7 @@ templ settingsBody(d SettingsData) {
 
 		if d.IsAdmin {
 			<section class="v-card p-6">
-				<h2 class="font-semibold mb-4">Users</h2>
+				<h2 class="v-section-title mb-4">Users</h2>
 				if d.UserError != "" {
 					<div class="v-flash-error">{ d.UserError }</div>
 				}