feat: Vision-Support für Gemma-4, Bilderkennung im Web UI

- Modell gewechselt zu aratan/gemma-4-E4B-q8-it-heretic:latest
- Multimodale Anfragen (Text + Bild) über Ollama API
- Bild-Upload im Chat-Interface mit Vorschau
- Automatisches Image-Resizing und JPEG-Kompression
- Vision-Regeln im Persona-Prompt integriert
- Memory-System erweitert für Bildhinweise
- Frontend: Bildvorschau, Upload-Button, responsive Styling
- README aktualisiert

static/style.css

@@ -64,6 +64,12 @@ header h1 {
     margin-top: 10px;
 }
 
+#vision-badge {
+    color: #7ee787;
+    font-weight: 600;
+    margin-left: 10px;
+}
+
 .memory-status {
     font-size: 0.8rem;
     color: var(--accent-soft);
@@ -129,6 +135,22 @@ header h1 {
     font-style: italic;
 }
 
+/* Images inside messages */
+.message-image {
+    max-width: 240px;
+    max-height: 180px;
+    border-radius: 12px;
+    margin-bottom: 8px;
+    display: block;
+    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
+    cursor: pointer;
+    transition: transform 0.2s;
+}
+
+.message-image:hover {
+    transform: scale(1.03);
+}
+
 /* Input Area */
 .input-area {
     position: sticky;
@@ -151,9 +173,52 @@ header h1 {
     50% { opacity: 1; }
 }
 
+/* Image Preview above input */
+.image-preview-container {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    margin-bottom: 10px;
+    padding: 8px;
+    background: var(--bg-secondary);
+    border: 1px solid var(--bg-tertiary);
+    border-radius: 12px;
+    width: fit-content;
+    max-width: 100%;
+}
+
+.image-preview {
+    max-height: 80px;
+    max-width: 120px;
+    border-radius: 8px;
+    object-fit: cover;
+}
+
+.remove-image-btn {
+    background: var(--accent);
+    color: white;
+    border: none;
+    border-radius: 50%;
+    width: 24px;
+    height: 24px;
+    font-size: 16px;
+    line-height: 24px;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: background 0.2s;
+}
+
+.remove-image-btn:hover {
+    background: #ff5a75;
+}
+
+/* Input Row */
 .input-row {
     display: flex;
     gap: 10px;
+    align-items: flex-start;
 }
 
 textarea {
@@ -176,6 +241,32 @@ textarea:focus {
     border-color: var(--accent);
 }
 
+.upload-btn {
+    background: var(--bg-tertiary);
+    color: var(--text-primary);
+    border: none;
+    border-radius: 25px;
+    padding: 15px 18px;
+    font-size: 1.1rem;
+    cursor: pointer;
+    transition: all 0.3s;
+    height: 50px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.upload-btn:hover:not(:disabled) {
+    background: var(--accent);
+    transform: scale(1.05);
+}
+
+.upload-btn:disabled {
+    background: var(--bg-tertiary);
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
 .send-btn {
     background: var(--accent);
     color: white;
@@ -304,21 +395,33 @@ textarea:focus {
     .container {
         padding: 10px;
     }
-    
+
     header h1 {
         font-size: 1.8rem;
     }
-    
+
     .message {
         max-width: 90%;
         padding: 12px 15px;
     }
-    
+
+    .message-image {
+        max-width: 180px;
+        max-height: 140px;
+    }
+
     .input-row {
-        flex-direction: column;
+        flex-wrap: wrap;
     }
-    
-    .send-btn {
+
+    .upload-btn, .send-btn {
+        height: 44px;
+        padding: 10px 18px;
+    }
+
+    textarea {
         width: 100%;
+        order: -1;
+        margin-bottom: 8px;
     }
-}
+}