Improve social media OG/Twitter meta for posts

- Fix bug: post page was overriding og:image with 150x200 thumbnail
- og:type = "article" for posts (was always "website")
- article:published_time, article:modified_time, article:author, article:tag
- og:image:alt + twitter:image:alt (post headline)
- twitter:label1/data1 with reading time
- Remove thumbnail fallback from socialImage (falls back to site logo instead)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/components/Card.svelte

@@ -47,7 +47,7 @@
     variants: {
       variant: {
         callout: "cursor-pointer transition-colors no-underline text-inherit hover:bg-wald-100",
-        tile: "transition-[transform,box-shadow,border-color] duration-200 no-underline hover:-translate-y-0.5 hover:shadow-md hover:border-wald-300",
+        tile: "transition-[transform,box-shadow,border-color] duration-200 no-underline hover:-translate-y-0.5 hover:shadow-md hover:border-wald-300 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500 focus-visible:ring-offset-2",
       },
     },
     defaultVariants: { variant: "tile" },

src/lib/components/Tag.svelte

@@ -54,7 +54,7 @@
   }
 
   const baseClass =
-    "inline-flex shrink-0 items-center gap-1 whitespace-nowrap border-0 py-1 px-2.5 text-[.6rem] rounded-full transition-[opacity,filter] no-underline shadow-none outline-none ring-0";
+    "inline-flex shrink-0 items-center gap-1 whitespace-nowrap border-0 py-1 px-2.5 text-[.6rem] rounded-full transition-[opacity,filter] no-underline shadow-none outline-none focus-visible:ring-2 focus-visible:ring-wald-500 focus-visible:ring-offset-1";
   const variantClass = $derived.by(() => {
     if (customColor?.trim()) {
       return "";

src/lib/components/blocks/SearchableTextBlock.svelte

@@ -1,5 +1,7 @@
 <script lang="ts">
   import { marked } from "$lib/markdown-safe";
+  import { slide } from "svelte/transition";
+  import { cubicOut } from "svelte/easing";
   import { getBlockLayoutClasses } from "$lib/block-layout";
   import type {
     SearchableTextBlockData,
@@ -27,7 +29,6 @@
     return tStatic(translations ?? null, key, replacements);
   }
   const helpTooltipText = $derived(t(T.searchable_text_help));
-
   const layoutClasses = $derived(getBlockLayoutClasses(block.layout));
 
   const fragments = $derived.by(() => {
@@ -64,6 +65,39 @@
   let searchQuery = $state("");
   let selectedTag = $state("all");
   let copiedIndex = $state<number | null>(null);
+  let openTitles = $state(new Set<string>());
+
+  function toggleItem(key: string) {
+    const s = new Set(openTitles);
+    if (s.has(key)) s.delete(key);
+    else s.add(key);
+    openTitles = s;
+  }
+
+  // Close all open items when search or tag filter changes
+  $effect(() => {
+    searchQuery;
+    selectedTag;
+    openTitles = new Set();
+  });
+
+  // Per-tag counts based on current search (ignoring tag filter) — updates live as user types
+  const tagCounts = $derived.by(() => {
+    const q = searchQuery.toLowerCase().trim().replace(/\s+/g, " ");
+    const counts = new Map<string, number>();
+    let allCount = 0;
+    for (const f of fragments) {
+      const titleNorm = f.title.toLowerCase().replace(/\s+/g, " ");
+      const textNorm = f.text.toLowerCase().replace(/<[^>]+>/g, " ").replace(/\s+/g, " ");
+      const matchesSearch = q === "" || titleNorm.includes(q) || textNorm.includes(q);
+      if (!matchesSearch) continue;
+      allCount++;
+      for (const tag of f.tags) {
+        counts.set(tag, (counts.get(tag) ?? 0) + 1);
+      }
+    }
+    return { counts, allCount };
+  });
 
   async function copyFragmentContent(
     fragment: { title: string; text: string },
@@ -166,7 +200,7 @@
   {#if block.title || descriptionHtml}
     <div class="px-4 md:px-6 py-5 bg-gradient-to-br from-wald-700 to-wald-800">
       {#if block.title}
-        <h2 class="text-xl md:text-2xl font-bold text-white mb-1">
+        <h2 class="text-xl md:text-2xl font-bold !text-white mb-1">
           {block.title}
         </h2>
       {/if}
@@ -186,7 +220,7 @@
         <Tooltip content={helpTooltipText} placement="top">
           <button
             type="button"
-            class="shrink-0 p-1.5 rounded-xs text-stein-400 hover:text-wald-600 hover:bg-wald-50 transition-colors focus:outline-none focus:ring-2 focus:ring-wald-500 focus:ring-offset-1"
+            class="shrink-0 p-1.5 rounded-xs text-stein-400 hover:text-wald-600 hover:bg-wald-50 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500 focus-visible:ring-offset-1"
             aria-label={t(T.searchable_text_help_aria)}
           >
             <Icon icon="mdi:help-circle-outline" class="size-5" aria-hidden="true" />
@@ -195,7 +229,7 @@
         <input
           type="search"
           placeholder={t(T.searchable_text_placeholder)}
-          class="w-full text-sm px-4 py-2.5 pr-10 border border-stein-200 rounded-xs focus:outline-none focus:ring-2 focus:ring-wald-500 focus:border-wald-400 bg-white text-stein-900 placeholder:text-stein-400"
+          class="w-full text-sm px-4 py-2.5 pr-10 border border-stein-200 rounded-xs focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500 focus-visible:border-wald-400 bg-white text-stein-900 placeholder:text-stein-400"
           bind:value={searchQuery}
           oninput={(e) => (searchQuery = (e.target as HTMLInputElement).value)}
           aria-label={t(T.searchable_text_search_aria)}
@@ -203,7 +237,7 @@
         {#if searchQuery}
           <button
             type="button"
-            class="absolute right-9 top-1/2 -translate-y-1/2 p-1.5 rounded-xs hover:bg-stein-100 text-stein-400 hover:text-stein-700 transition-colors"
+            class="absolute right-9 top-1/2 -translate-y-1/2 p-1.5 rounded-xs hover:bg-stein-100 text-stein-400 hover:text-stein-700 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500"
             onclick={() => (searchQuery = "")}
             aria-label={t(T.searchable_text_clear_search)}
           >
@@ -220,14 +254,14 @@
         <div class="overflow-x-auto -mx-1 px-1 pt-1 pb-1">
           <div class="flex gap-1.5 flex-wrap">
             <Tag
-              label={t(T.searchable_text_tag_all)}
+              label={`${t(T.searchable_text_tag_all)} (${tagCounts.allCount})`}
               variant={selectedTag === "all" ? "green" : "white"}
               active={selectedTag === "all"}
               onclick={() => (selectedTag = "all")}
             />
             {#each allTags as tag}
               <Tag
-                label={tag}
+                label={`${tag} (${tagCounts.counts.get(tag) ?? 0})`}
                 variant={selectedTag === tag ? "green" : "white"}
                 active={selectedTag === tag}
                 onclick={() => (selectedTag = tag)}
@@ -243,86 +277,118 @@
     class="text-xs text-stein-500 px-4 md:px-6 py-2 bg-stein-50 border-b border-stein-100"
     aria-live="polite"
   >
-    {#if visibleFragments.length === 0}
-      <span>{t(T.searchable_text_no_results)}</span>
-    {:else}
-      <span>
-        {visibleFragments.length === fragments.length
-          ? t(T.searchable_text_count_all, { count: visibleFragments.length })
-          : t(T.searchable_text_count_filtered, {
-              visible: visibleFragments.length,
-              total: fragments.length,
-            })}
-      </span>
-    {/if}
+    <span>
+      {visibleFragments.length === fragments.length
+        ? t(T.searchable_text_count_all, { count: visibleFragments.length })
+        : t(T.searchable_text_count_filtered, {
+            visible: visibleFragments.length,
+            total: fragments.length,
+          })}
+    </span>
   </div>
 
   <div class="flex flex-col divide-y divide-stein-100">
-    {#each visibleFragments as fragment, i}
-      <details class="group border-l-4 border-l-transparent open:border-l-wald-500 transition-colors bg-white open:bg-wald-50/30">
-        <summary
-          class="cursor-pointer list-none px-4 md:px-6 py-3.5 hover:bg-wald-50/60 text-sm font-medium text-stein-800 flex flex-col gap-1.5 transition-colors"
-        >
-          <div class="flex items-start gap-2 min-w-0">
-            <div class="grow min-w-0">
-              {@html highlightInText(
-                fragment.title || t(T.searchable_text_untitled),
-                searchQuery.trim(),
-              )}
-            </div>
-            <div class="shrink-0 flex items-center gap-2">
-              <button
-                type="button"
-                class="opacity-0 group-hover:opacity-100 inline-flex items-center gap-1 px-2 py-1 text-xs font-normal rounded-xs border border-stein-200 bg-white text-stein-600 hover:bg-wald-50 hover:border-wald-300 hover:text-wald-800 transition-all"
-                onclick={(e) => {
-                  e.preventDefault();
-                  copyFragmentContent(fragment, i);
-                }}
-                aria-label={t(T.searchable_text_copy_aria)}
-                tabindex="-1"
-              >
-                {#if copiedIndex === i}
-                  <Icon icon="mdi:check" class="size-3.5 text-wald-600" aria-hidden="true" />
-                {:else}
-                  <Icon icon="mdi:content-copy" class="size-3.5" aria-hidden="true" />
-                {/if}
-              </button>
-              <Icon
-                icon="mdi:chevron-down"
-                class="text-stein-400 group-open:rotate-180 transition-transform size-5"
-                aria-hidden="true"
-              />
-            </div>
-          </div>
-          {#if fragment.tags.length > 0}
-            <span class="flex flex-wrap gap-1">
-              <Tags tags={fragment.tags} variant="white" />
-            </span>
-          {/if}
-        </summary>
-        <div class="px-4 md:px-6 py-4 bg-white border-t border-stein-100 markdown prose prose-zinc prose-sm max-w-none text-xs">
-          <div class="flex justify-end mb-3 -mt-1">
-            <button
-              type="button"
-              class="inline-flex items-center gap-1.5 px-2.5 py-1.5 text-xs font-medium rounded-xs border border-stein-200 bg-stein-50 text-stein-700 hover:bg-wald-50 hover:border-wald-300 hover:text-wald-800 transition-colors"
-              onclick={(e) => {
-                e.preventDefault();
-                copyFragmentContent(fragment, i);
-              }}
-              aria-label={t(T.searchable_text_copy_aria)}
-            >
-              {#if copiedIndex === i}
-                <Icon icon="mdi:check" class="size-4 text-wald-600" aria-hidden="true" />
-                <span>{t(T.searchable_text_copied)}</span>
-              {:else}
-                <Icon icon="mdi:content-copy" class="size-4" aria-hidden="true" />
-                <span>{t(T.searchable_text_copy_button)}</span>
-              {/if}
-            </button>
-          </div>
-          {@html highlightInHtml(fragment.textHtml, searchQuery.trim())}
+    {#if visibleFragments.length === 0}
+      <div class="flex flex-col items-center justify-center gap-3 py-12 px-6 text-center">
+        <div class="size-12 rounded-full bg-stein-100 flex items-center justify-center">
+          <Icon icon="mdi:magnify" class="size-6 text-stein-400" aria-hidden="true" />
         </div>
-      </details>
-    {/each}
+        <div>
+          <div class="text-sm font-medium text-stein-600">{t(T.searchable_text_no_results)}</div>
+          <div class="text-xs text-stein-400 mt-0.5">Suchbegriff oder Filter anpassen</div>
+        </div>
+        <button
+          type="button"
+          class="text-xs px-3 py-1.5 rounded-xs border border-stein-200 bg-white text-stein-600 hover:bg-wald-50 hover:border-wald-300 hover:text-wald-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500"
+          onclick={() => { searchQuery = ""; selectedTag = "all"; }}
+        >
+          Filter zurücksetzen
+        </button>
+      </div>
+    {:else}
+      {#each visibleFragments as fragment, i}
+        {@const itemKey = fragment.title || String(i)}
+        {@const isOpen = openTitles.has(itemKey)}
+        <div
+          class="group/item border-l-4 transition-colors {isOpen
+            ? 'border-l-wald-500 bg-wald-50/30'
+            : 'border-l-transparent bg-white'}"
+        >
+          <div
+            role="button"
+            tabindex="0"
+            aria-expanded={isOpen}
+            class="cursor-pointer px-4 md:px-6 py-3.5 hover:bg-wald-50/60 text-sm font-medium text-stein-800 flex flex-col gap-1.5 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-wald-500"
+            onclick={() => toggleItem(itemKey)}
+            onkeydown={(e) =>
+              (e.key === "Enter" || e.key === " ") &&
+              (e.preventDefault(), toggleItem(itemKey))}
+          >
+            <div class="flex items-start gap-2 min-w-0">
+              <div class="grow min-w-0">
+                {@html highlightInText(
+                  fragment.title || t(T.searchable_text_untitled),
+                  searchQuery.trim(),
+                )}
+              </div>
+              <div class="shrink-0 flex items-center gap-2">
+                <button
+                  type="button"
+                  class="opacity-0 group-hover/item:opacity-100 focus-visible:opacity-100 inline-flex items-center gap-1 px-2 py-1 text-xs font-normal rounded-xs border border-stein-200 bg-white text-stein-600 hover:bg-wald-50 hover:border-wald-300 hover:text-wald-800 transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500"
+                  onclick={(e) => {
+                    e.stopPropagation();
+                    copyFragmentContent(fragment, i);
+                  }}
+                  aria-label={t(T.searchable_text_copy_aria)}
+                >
+                  {#if copiedIndex === i}
+                    <Icon icon="mdi:check" class="size-3.5 text-wald-600" aria-hidden="true" />
+                  {:else}
+                    <Icon icon="mdi:content-copy" class="size-3.5" aria-hidden="true" />
+                  {/if}
+                </button>
+                <Icon
+                  icon="mdi:chevron-down"
+                  class="text-stein-400 transition-transform size-5 {isOpen ? 'rotate-180' : ''}"
+                  aria-hidden="true"
+                />
+              </div>
+            </div>
+            {#if fragment.tags.length > 0}
+              <span class="flex flex-wrap gap-1">
+                <Tags tags={fragment.tags} variant="white" />
+              </span>
+            {/if}
+          </div>
+          {#if isOpen}
+            <div
+              transition:slide={{ duration: 180, easing: cubicOut }}
+              class="px-4 md:px-6 py-4 bg-white border-t border-stein-100 markdown prose prose-zinc prose-sm max-w-none text-xs"
+            >
+              <div class="flex justify-end mb-3 -mt-1">
+                <button
+                  type="button"
+                  class="inline-flex items-center gap-1.5 px-2.5 py-1.5 text-xs font-medium rounded-xs border border-stein-200 bg-stein-50 text-stein-700 hover:bg-wald-50 hover:border-wald-300 hover:text-wald-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-wald-500"
+                  onclick={(e) => {
+                    e.preventDefault();
+                    copyFragmentContent(fragment, i);
+                  }}
+                  aria-label={t(T.searchable_text_copy_aria)}
+                >
+                  {#if copiedIndex === i}
+                    <Icon icon="mdi:check" class="size-4 text-wald-600" aria-hidden="true" />
+                    <span>{t(T.searchable_text_copied)}</span>
+                  {:else}
+                    <Icon icon="mdi:content-copy" class="size-4" aria-hidden="true" />
+                    <span>{t(T.searchable_text_copy_button)}</span>
+                  {/if}
+                </button>
+              </div>
+              {@html highlightInHtml(fragment.textHtml, searchQuery.trim())}
+            </div>
+          {/if}
+        </div>
+      {/each}
+    {/if}
   </div>
 </div>

src/lib/ui/Tooltip.svelte

@@ -13,7 +13,8 @@
   let wrapperEl = $state<HTMLDivElement | null>(null);
   let showTooltip = $state(false);
   let placement = $state<"top" | "bottom">("top");
-  let leftPx = $state<number | null>(null); // null = centered (CSS), number = clamped px from wrapper left
+  let fixedLeft = $state(0);
+  let fixedTop = $state(0);
 
   function updatePosition() {
     if (!wrapperEl) return;
@@ -25,20 +26,13 @@
     const spaceBelow = vh - rect.bottom;
     placement =
       preferredPlacement === "top"
-        ? spaceAbove >= spaceBelow
-          ? "top"
-          : "bottom"
-        : spaceBelow >= spaceAbove
-          ? "bottom"
-          : "top";
+        ? spaceAbove >= spaceBelow ? "top" : "bottom"
+        : spaceBelow >= spaceAbove ? "bottom" : "top";
 
     const iconCenterX = rect.left + rect.width / 2;
     const idealLeft = iconCenterX - TOOLTIP_MAX_WIDTH_PX / 2;
-    const clampedLeft = Math.max(
-      TOOLTIP_GAP,
-      Math.min(idealLeft, vw - TOOLTIP_MAX_WIDTH_PX - TOOLTIP_GAP),
-    );
-    leftPx = clampedLeft - rect.left;
+    fixedLeft = Math.max(TOOLTIP_GAP, Math.min(idealLeft, vw - TOOLTIP_MAX_WIDTH_PX - TOOLTIP_GAP));
+    fixedTop = placement === "top" ? rect.top - TOOLTIP_GAP : rect.bottom + TOOLTIP_GAP;
   }
 
   function handleShow() {
@@ -48,17 +42,21 @@
 
   function handleHide() {
     showTooltip = false;
-    leftPx = null;
   }
 
-  const placementClasses = $derived(
+  const tooltipStyle = $derived(
     placement === "top"
-      ? "bottom-full mb-2"
-      : "top-full mt-2",
-  );
-  const horizontalStyle = $derived(
-    leftPx != null ? `left: ${leftPx}px; transform: none;` : "left: 50%; transform: translateX(-50%);",
+      ? `position:fixed;top:${fixedTop}px;left:${fixedLeft}px;transform:translateY(-100%);`
+      : `position:fixed;top:${fixedTop}px;left:${fixedLeft}px;`,
   );
+
+  // Portal action: moves the node into document.body so overflow:hidden ancestors can't clip it.
+  function portal(node: HTMLElement) {
+    document.body.appendChild(node);
+    return {
+      destroy() { node.remove(); },
+    };
+  }
 </script>
 
 <div
@@ -73,9 +71,10 @@
   {@render children?.()}
   {#if showTooltip}
     <div
+      use:portal
       role="tooltip"
-      class="absolute z-50 {placementClasses} px-3 py-2 text-xs font-normal text-stein-0 bg-stein-800 rounded-xs shadow-lg min-w-56 max-w-88 text-center pointer-events-none whitespace-normal"
-      style={horizontalStyle}
+      class="z-[9999] px-3 py-2 text-xs font-normal text-stein-0 bg-stein-800 rounded-xs shadow-lg min-w-56 max-w-88 text-center pointer-events-none whitespace-normal"
+      style={tooltipStyle}
     >
       {content}
     </div>

src/routes/+layout.svelte

@@ -52,6 +52,14 @@
     seoTitle?: string;
     seoDescription?: string;
     socialImage?: string;
+    ogType?: string;
+    ogImageAlt?: string;
+    articlePublishedTime?: string | null;
+    articleModifiedTime?: string | null;
+    articleAuthor?: string | null;
+    articleTags?: string[];
+    twitterLabel1?: string;
+    twitterData1?: string;
     robots?: string;
     keywords?: string;
     preview?: boolean;
@@ -218,7 +226,7 @@
     {/if}
     <link rel="canonical" href={canonical} />
     <!-- Open Graph -->
-    <meta property="og:type" content="website" />
+    <meta property="og:type" content={pageData?.ogType ?? "website"} />
     <meta property="og:url" content={canonical} />
     <meta property="og:title" content={seoTitle} />
     {#if seoDescription}
@@ -228,9 +236,24 @@
       <meta property="og:image" content={socialImageUrl} />
       <meta property="og:image:width" content={String(SOCIAL_IMAGE_DIMENSIONS.width)} />
       <meta property="og:image:height" content={String(SOCIAL_IMAGE_DIMENSIONS.height)} />
+      {#if pageData?.ogImageAlt}
+        <meta property="og:image:alt" content={pageData.ogImageAlt} />
+      {/if}
     {/if}
     <meta property="og:locale" content="de_DE" />
     <meta property="og:site_name" content={data.siteName} />
+    {#if pageData?.articlePublishedTime}
+      <meta property="article:published_time" content={pageData.articlePublishedTime} />
+    {/if}
+    {#if pageData?.articleModifiedTime}
+      <meta property="article:modified_time" content={pageData.articleModifiedTime} />
+    {/if}
+    {#if pageData?.articleAuthor}
+      <meta property="article:author" content={pageData.articleAuthor} />
+    {/if}
+    {#each pageData?.articleTags ?? [] as tag}
+      <meta property="article:tag" content={tag} />
+    {/each}
     <!-- Twitter -->
     <meta name="twitter:card" content="summary_large_image" />
     <meta name="twitter:url" content={canonical} />
@@ -240,6 +263,13 @@
     {/if}
     {#if socialImageUrl}
       <meta name="twitter:image" content={socialImageUrl} />
+      {#if pageData?.ogImageAlt}
+        <meta name="twitter:image:alt" content={pageData.ogImageAlt} />
+      {/if}
+    {/if}
+    {#if pageData?.twitterLabel1 && pageData?.twitterData1}
+      <meta name="twitter:label1" content={pageData.twitterLabel1} />
+      <meta name="twitter:data1" content={pageData.twitterData1} />
     {/if}
     <!-- JSON-LD WebSite + Organization -->
     {@html jsonLdScript}

src/routes/post/[slug]/+page.server.ts

@@ -303,13 +303,22 @@ export const load: PageServerLoad = async ({ params, locals, url, setHeaders })
     translations,
     seoTitle: post.seoTitle ?? postHeadline,
     seoDescription: postDescription,
-    socialImage: postSocialImageAbs ?? postImageUrl ?? undefined,
+    socialImage: postSocialImageAbs ?? undefined,
+    ogType: 'article' as const,
+    ogImageAlt: postHeadline,
+    articlePublishedTime: postCreated,
+    articleModifiedTime: postUpdated,
+    articleAuthor: postAuthor ?? siteName,
+    articleTags: (() => {
+      const tags = (post as { postTag?: Array<{ name?: string }> }).postTag ?? [];
+      return tags.map((t) => (typeof t === 'string' ? t : (t?.name ?? ''))).filter(Boolean);
+    })(),
+    twitterLabel1: 'Lesezeit',
+    twitterData1: `${readingTimeMinutes} Min.`,
     robots: (post as { seoMetaRobots?: string }).seoMetaRobots ?? undefined,
     keywords: (() => {
       const explicit = ((post as { seoKeywords?: string }).seoKeywords ?? '').trim();
       if (explicit) return explicit;
-      // Fallback: join tag names so published posts without explicit keywords
-      // still ship a meaningful <meta name="keywords">.
       const tags = (post as { postTag?: Array<{ name?: string }> }).postTag ?? [];
       const names = tags
         .map((t) => (typeof t?.name === 'string' ? t.name.trim() : ''))

src/routes/post/[slug]/+page.svelte

@@ -14,15 +14,6 @@
   let { data }: { data: PageData } = $props();
 </script>
 
-<svelte:head>
-  <title>{data.seoTitle}</title>
-  {#if data.seoDescription}
-    <meta name="description" content={data.seoDescription} />
-  {/if}
-  {#if data.postImageUrl}
-    <meta property="og:image" content={data.postImageUrl} />
-  {/if}
-</svelte:head>
 
 <div class="my-4 md:flex md:items-start md:gap-4">
   {#if data.rawPostImageUrl}