refactor: remove KI-Orakel from history page and backend

Drop oracle UI, API endpoint, scheduled generation, and related docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

public/app.js

@@ -129,8 +129,6 @@ async function loadHistory() {
   const data = await api.history(90);
   renderHeatmap(data.days);
   updateStats(data.stats);
-  const oracle = await api.oracle().catch(() => ({ text: "Das Orakel schweigt. Wahrscheinlich enttäuscht." }));
-  document.getElementById("oracleText").textContent = oracle.text;
 }
 
 async function handleDeepLink() {

public/index.html

@@ -67,10 +67,6 @@
               <div class="statLabel">Genommen</div>
             </div>
           </div>
-          <div class="oracleCard" id="oracleCard">
-            <div class="oracleLabel">🔮 KI-Orakel</div>
-            <p id="oracleText">Lade Orakel…</p>
-          </div>
           <h2 class="sectionTitle">90-Tage Heatmap</h2>
           <div id="heatmap" class="heatmap"></div>
         </div>

public/lib/api.js

@@ -26,7 +26,6 @@ export const api = {
   history: (days = 90) => request(`/api/history?days=${days}`),
   stats: () => request("/api/stats"),
   roast: () => request("/api/roast"),
-  oracle: () => request("/api/oracle"),
   snooze: (slot_id, minutes) => request("/api/snooze", { method: "POST", body: JSON.stringify({ slot_id, minutes }) }),
   vapidKey: () => request("/api/vapid-public-key"),
   pushSubscribe: (subscription) =>

public/styles.css

@@ -97,18 +97,18 @@ body {
 @keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
 
 /* Cards */
-.roastCard, .oracleCard, .motivationCard {
+.roastCard, .motivationCard {
   background: linear-gradient(135deg, var(--bg-card) 0%, #3a1855 100%);
   border: 2px solid var(--accent-purple);
   border-radius: var(--radius); padding: 1rem 1.25rem;
   margin-bottom: 1.25rem; box-shadow: 0 4px 20px rgba(124,77,255,.2);
 }
-.roastLabel, .oracleLabel, .motivationLabel {
+.roastLabel, .motivationLabel {
   font-size: .65rem; text-transform: uppercase; letter-spacing: .06em;
   line-height: 1.35;
   color: var(--accent-purple); margin-bottom: .5rem; font-weight: 600;
 }
-.roastCard p, .oracleCard p, .motivationCard p { line-height: 1.5; font-size: .95rem; }
+.roastCard p, .motivationCard p { line-height: 1.5; font-size: .95rem; }
 
 .slotCards { display: flex; flex-direction: column; gap: 1rem; }