feat: add simulcast page with season picker and navigation

templates/simulcast.gohtml

@@ -0,0 +1,58 @@
+{{define "title"}}Simulcast{{end}}
+{{define "content"}}
+<div class="mx-auto flex w-full max-w-7xl flex-col gap-6 pb-12">
+  <div class="flex flex-col gap-4 sm:flex-row sm:items-end sm:justify-between">
+    <h1 class="text-2xl font-medium text-foreground">Simulcast Season</h1>
+    <ui-dropdown class="relative block" data-align="right" data-width="min-w-44">
+      <div data-trigger class="cursor-pointer">
+        <button type="button" class="flex h-10 min-w-44 items-center justify-between gap-3 bg-background-button px-4 text-sm text-foreground transition-colors hover:bg-background-button-hover focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-accent">
+          <span>{{.SeasonLabel}} {{.Year}}</span>
+          <svg class="h-4 w-4 text-foreground-muted" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="m6 9 6 6 6-6" /></svg>
+        </button>
+      </div>
+      <div data-content class="absolute right-0 top-full z-50 mt-2 hidden max-h-80 min-w-44 overflow-y-auto bg-background-button shadow-card scrollbar-hidden">
+        <div class="flex flex-col py-1">
+          {{range .SeasonOptions}}
+          <a href="/simulcast?season={{.Season}}&year={{.Year}}" class="flex w-full items-center px-5 py-2.5 text-sm transition-colors hover:bg-surface-hover {{if and (eq .Season $.Season) (eq .Year $.Year)}}text-accent{{else}}text-foreground-muted hover:text-foreground{{end}}">{{.Label}}</a>
+          {{end}}
+        </div>
+      </div>
+    </ui-dropdown>
+  </div>
+
+  {{if .Animes}}
+  <div class="grid grid-cols-2 gap-x-4 gap-y-7 sm:grid-cols-3 lg:grid-cols-4 xl:grid-cols-6">
+    {{range .Animes}}
+      {{template "anime_card" dict "Anime" . "WithActions" true "IsWatchlist" (index $.WatchlistMap .MalID)}}
+    {{end}}
+  </div>
+  {{else}}
+  <div class="border border-border-light px-6 py-16 text-center text-sm text-foreground-muted">No provider releases found for {{.SeasonLabel}} {{.Year}}.</div>
+  {{end}}
+
+  <div class="flex items-center justify-between border-t-2 border-border-light pt-4 text-xs font-medium uppercase tracking-wide text-foreground-muted">
+    {{if .Previous}}
+    <a href="/simulcast?season={{.Previous.Season}}&year={{.Previous.Year}}" class="inline-flex items-center gap-2 transition-colors hover:text-foreground">
+      <svg class="size-4" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m15 18-6-6 6-6" /></svg>
+      Previous season
+    </a>
+    {{else}}
+    <span class="inline-flex cursor-not-allowed items-center gap-2 opacity-35" aria-disabled="true">
+      <svg class="size-4" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m15 18-6-6 6-6" /></svg>
+      Previous season
+    </span>
+    {{end}}
+    {{if .Next}}
+    <a href="/simulcast?season={{.Next.Season}}&year={{.Next.Year}}" class="inline-flex items-center gap-2 transition-colors hover:text-foreground">
+      Next season
+      <svg class="size-4" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 18 6-6-6-6" /></svg>
+    </a>
+    {{else}}
+    <span class="inline-flex cursor-not-allowed items-center gap-2 opacity-35" aria-disabled="true">
+      Next season
+      <svg class="size-4" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 18 6-6-6-6" /></svg>
+    </span>
+    {{end}}
+  </div>
+</div>
+{{end}}