feat(v8.2): UX — Guide-Tabs, Begriffe oben, Mobile, Download-Links

- GuidesPanel: "Begriffe kurz erklärt" jetzt ganz oben (vor Guide-Karten)
- GuidesPanel: Tab-Navigation mit Kategorie-Chips + Active-Highlighting;
  Klick scrollt zur jeweiligen Guide-Gruppe
- ConnectPanel: Download-Links für Zed (zed.dev) und Cline (VS Code +
  JetBrains Marketplace) ergänzt
- base.css: Mobile-Breakpoint ≤520px — Sidebar wird zur Bottom-Nav,
  Content-Padding reduziert, Touch-freundliche Button-Höhen (min 40px),
  Topbar kompaktiert, Guide-Tabs horizontal scrollbar

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

frontend/src/panels/ConnectPanel.svelte

@@ -270,6 +270,7 @@
       </div>
       <p style="margin-top:12px"><b>API-Key:</b> Öffne den Agent-Panel → Anbieter <b>bosgame</b> → trag irgendeinen Wert ein (z.B. <code>local</code>).</p>
       <div class="hint">Danach im Agent-Panel das Modell <b>bosgame / {firstModel}</b> auswählen.</div>
+      <div class="hint" style="margin-top:4px">Zed herunterladen: <a href="https://zed.dev" target="_blank" rel="noopener">zed.dev</a> — kostenlos, native Performance, Windows/macOS/Linux.</div>
     {:else if selectedTool === 'opencode'}
       {@const block = openCodeBlock(url, activeIds)}
       <p>Datei anlegen oder öffnen (OpenCode Desktop nutzt <b>.jsonc</b> — JSON mit Kommentaren):</p>
@@ -294,6 +295,7 @@
         <button class="ghost" onclick={e => copyVal((e.currentTarget as HTMLElement).previousElementSibling as HTMLInputElement)}>Kopieren</button>
       </div>
       <div class="hint">API-Key: ein beliebiger Wert (z.B. <code>local</code>).</div>
+      <div class="hint" style="margin-top:4px">Cline für VS Code: <a href="https://marketplace.visualstudio.com/items?itemName=saoudrizwan.claude-dev" target="_blank" rel="noopener">VS Code Marketplace</a> · für JetBrains: <a href="https://plugins.jetbrains.com/plugin/24604-cline" target="_blank" rel="noopener">JetBrains Marketplace</a></div>
     {:else if selectedTool === 'openwebui'}
       <p>Settings → Admin Panel → Connections → neue OpenAI-Verbindung:</p>
       <label>Basis-URL</label>

frontend/src/panels/GuidesPanel.svelte

@@ -1,5 +1,12 @@
 <script lang="ts">
   import { GUIDE_GROUPS, CONCEPTS } from './guides-data.js'
+
+  let activeGroup = $state(0)
+
+  function scrollTo(gi: number) {
+    activeGroup = gi
+    document.getElementById(`guide-group-${gi}`)?.scrollIntoView({ behavior: 'smooth', block: 'start' })
+  }
 </script>
 
 <div class="pagehead">
@@ -9,8 +16,33 @@
   </div>
 </div>
 
+<!-- Begriffe oben -->
+<div class="card">
+  <div class="card-h"><h3>Begriffe kurz erklärt</h3></div>
+  <div class="concept-grid" style="margin-top:8px">
+    {#each CONCEPTS as [term, text]}
+      <div class="concept">
+        <h4>{term}</h4>
+        <p>{text}</p>
+      </div>
+    {/each}
+  </div>
+</div>
+
+<!-- Tab-Navigation -->
+<div class="guide-tabs">
+  {#each GUIDE_GROUPS as group, gi}
+    <button
+      class="guide-tab{activeGroup === gi ? ' active' : ''}"
+      onclick={() => scrollTo(gi)}>
+      {group.label}
+    </button>
+  {/each}
+</div>
+
+<!-- Guide-Karten -->
 {#each GUIDE_GROUPS as group, gi}
-  <div class="card guide-card">
+  <div class="card guide-card" id="guide-group-{gi}">
     <div class="guide-group-hd">{group.label}</div>
     {#each group.tutorials as [title, body], i}
       <details class="guide-acc" open={gi === 0 && i === 0}>
@@ -21,21 +53,36 @@
   </div>
 {/each}
 
-<div class="card-h" style="margin-top:8px"><h3>Begriffe kurz erklärt</h3></div>
-<div class="concept-grid">
-  {#each CONCEPTS as [term, text]}
-    <div class="concept">
-      <h4>{term}</h4>
-      <p>{text}</p>
-    </div>
-  {/each}
-</div>
-
 <style>
+  .guide-tabs {
+    display: flex;
+    gap: 6px;
+    flex-wrap: wrap;
+    margin: -6px 0 2px;
+  }
+
+  .guide-tab {
+    font-size: 12px;
+    padding: 5px 13px;
+    border-radius: 999px;
+    background: var(--tile);
+    border: 1px solid var(--line);
+    color: var(--mut);
+    cursor: pointer;
+    transition: .13s;
+    font-family: var(--sans);
+  }
+  .guide-tab:hover { color: var(--tx); border-color: var(--line2); }
+  .guide-tab.active {
+    background: rgba(45,212,191,.12);
+    border-color: rgba(45,212,191,.30);
+    color: var(--accent);
+  }
+
   .guide-card {
     padding: 0;
     overflow: hidden;
-    margin-bottom: 8px;
+    margin-bottom: 0;
   }
 
   .guide-group-hd {