Update bot configuration and activity type in schema

- Modified package.json to add a new script for setting the bot banner.
- Changed the default activity type in schema.prisma from 'Playing' to 'Watching' for improved bot presence management.

docs/logo/nexumi-banner.svg

@@ -0,0 +1,58 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="480" viewBox="0 0 1200 480" role="img" aria-label="Nexumi Discord banner">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#0C0E15"/>
+      <stop offset="0.55" stop-color="#12141F"/>
+      <stop offset="1" stop-color="#0A0A0D"/>
+    </linearGradient>
+    <radialGradient id="glow" cx="28%" cy="48%" r="45%">
+      <stop offset="0" stop-color="#6366F1" stop-opacity="0.35"/>
+      <stop offset="0.55" stop-color="#6366F1" stop-opacity="0.12"/>
+      <stop offset="1" stop-color="#6366F1" stop-opacity="0"/>
+    </radialGradient>
+    <linearGradient id="mark" x1="0" y1="1" x2="1" y2="0">
+      <stop offset="0" stop-color="#6366F1"/>
+      <stop offset="1" stop-color="#8B5CF6"/>
+    </linearGradient>
+  </defs>
+
+  <rect width="1200" height="480" fill="url(#bg)"/>
+  <rect width="1200" height="480" fill="url(#glow)"/>
+
+  <!-- faint network dots -->
+  <g fill="#6366F1" fill-opacity="0.18">
+    <circle cx="620" cy="90" r="3"/>
+    <circle cx="760" cy="140" r="2.5"/>
+    <circle cx="900" cy="100" r="3"/>
+    <circle cx="980" cy="200" r="2"/>
+    <circle cx="840" cy="280" r="2.5"/>
+    <circle cx="1040" cy="320" r="3"/>
+    <circle cx="700" cy="360" r="2"/>
+    <circle cx="1120" cy="160" r="2.5"/>
+  </g>
+  <g stroke="#6366F1" stroke-opacity="0.12" stroke-width="1.5" fill="none">
+    <path d="M620 90 L760 140 L900 100 L980 200"/>
+    <path d="M760 140 L840 280 L700 360"/>
+    <path d="M900 100 L1120 160 L1040 320"/>
+  </g>
+
+  <!-- N mark (scaled from logo proportions) -->
+  <g transform="translate(110,40) scale(1.05)">
+    <g fill="none" stroke="url(#mark)" stroke-linecap="round" stroke-linejoin="round">
+      <path d="M170 362 V150 L342 362 V150" stroke-width="78" stroke-opacity="0.10"/>
+      <path d="M170 362 V150 L342 362 V150" stroke-width="52" stroke-opacity="0.16"/>
+      <path d="M170 362 V150 L342 362 V150" stroke-width="30"/>
+    </g>
+    <g fill="url(#mark)">
+      <circle cx="170" cy="150" r="34"/>
+      <circle cx="170" cy="362" r="34"/>
+      <circle cx="342" cy="362" r="34"/>
+      <circle cx="342" cy="150" r="34"/>
+    </g>
+    <circle cx="342" cy="150" r="14" fill="#C7D2FE"/>
+  </g>
+
+  <!-- wordmark -->
+  <text x="620" y="250" fill="#E6E6EA" font-family="Inter, ui-sans-serif, system-ui, sans-serif" font-size="92" font-weight="700" letter-spacing="-2">Nexumi</text>
+  <text x="624" y="300" fill="#9A9AA5" font-family="Inter, ui-sans-serif, system-ui, sans-serif" font-size="28" font-weight="500">nexumi.de</text>
+</svg>