feat(ui): migrate remaining pages to the new shell

Apply the sidebar shell and bold primitives across the rest of the app so
the whole experience shares one visual language:

- Browse/organize: series (keeps stacked-covers/series-card CSS),
  collections (keeps wood-paneling + carousel classes), browse_detail.
- Account/stats: profile + form + modal, progress, analytics (stat-card
  tiles), devices, conflicts (status semantics), queue (status/priority
  badges).
- Admin: admin sidebar restyled with icons, dashboard/users/library/
  processing-issues/settings migrated to .card/.btn/.input primitives.
- Docs/setup/misc: docs (keeps prose/highlight.js), api_explorer, setup
  wizard, unlinked_books, custom_section builder.
- Modals/fragments: collection_modal, collection_rules,
  restore_system_collection_modal, filter_item, book_detail_modals — all
  overlays use --surface-overlay + --shadow-pop.

Every Alpine handler, HTMX attribute, id, name, and data-* is preserved;
only presentation changes.

templates/profile_templ.go

@@ -37,7 +37,15 @@ func Profile(user User) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 2, "<main class=\"max-w-4xl mx-auto px-4 py-8\"><div class=\"mb-8\"><h1 class=\"text-3xl font-bold mb-2\" style=\"color: var(--text-primary)\">Profile Settings</h1><p style=\"color: var(--text-secondary)\">Manage your account information and preferences</p></div><div class=\"space-y-8\"><!-- Account Information & Password - uses reusable ProfileForm --><div class=\"card p-6 rounded-lg border\" style=\"background-color: var(--bg-secondary); border-color: var(--border)\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 2, "<main class=\"mx-auto max-w-4xl px-4 sm:px-6 lg:px-8 py-8\"><div class=\"mb-8 flex items-center gap-3\"><span class=\"grid place-items-center h-10 w-10 rounded-xl shrink-0\" style=\"background-color: var(--accent-muted); color: var(--accent);\">")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = Icon("user", "h-5 w-5").Render(ctx, templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 3, "</span><div><h1 class=\"text-2xl font-bold tracking-tight\" style=\"color: var(--text-primary)\">Profile Settings</h1><p class=\"text-sm mt-0.5\" style=\"color: var(--text-secondary)\">Manage your account information and preferences</p></div></div><div class=\"space-y-6\"><div class=\"card p-6\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -45,7 +53,23 @@ func Profile(user User) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 3, "</div><!-- Danger Zone --><div class=\"card p-6 rounded-lg border\" style=\"background-color: var(--bg-secondary); border-color: var(--border)\"><h3 class=\"text-xl font-semibold mb-4\" style=\"color: var(--text-primary)\">Danger Zone</h3><p style=\"color: var(--text-secondary)\" class=\"mb-4\">Once you delete your account, there is no going back. Please be certain.</p><button @click=\"confirmDeleteAccount()\" class=\"px-4 py-2 rounded text-sm\" style=\"background-color: #dc2626; color: white;\">Remove My Account</button></div></div></main></body></html>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 4, "</div><div class=\"card p-6\"><div class=\"flex items-start gap-3 mb-4\"><span class=\"grid place-items-center h-10 w-10 rounded-xl shrink-0\" style=\"background-color: color-mix(in srgb, var(--status-danger) 18%, transparent); color: var(--status-danger);\">")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = Icon("alert", "h-5 w-5").Render(ctx, templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 5, "</span><div><h3 class=\"text-lg font-semibold\" style=\"color: var(--text-primary)\">Danger Zone</h3><p class=\"text-sm mt-0.5\" style=\"color: var(--text-secondary)\">Once you delete your account, there is no going back. Please be certain.</p></div></div><button @click=\"confirmDeleteAccount()\" class=\"btn btn-danger\">")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = Icon("trash", "h-4 w-4").Render(ctx, templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 6, "Remove My Account</button></div></div></main></body></html>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}