V1.5.0: Version bump + Download-Button Redesign

- Version auf 1.5.0 in allen Packages, CI, Dockerfile, Electron
- Download-Button im gleichen Design wie Version-Badge (bg-secondary, radius, hover accent)
- CI Registry auf adriahub (192.168.1.100:9080) umgestellt

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

web/package.json

@@ -1,6 +1,6 @@
 {
   "name": "gaming-hub-web",
-  "version": "1.0.0",
+  "version": "1.5.0",
   "type": "module",
   "scripts": {
     "dev": "vite",

web/src/App.tsx

@@ -91,7 +91,7 @@ export default function App() {
     return () => { es?.close(); clearTimeout(retryTimer); };
   }, []);
 
-  const version = (import.meta as any).env?.VITE_APP_VERSION ?? '1.0.0';
+  const version = (import.meta as any).env?.VITE_APP_VERSION ?? '1.5.0';
 
   // Tab icon mapping
   const tabIcons: Record<string, string> = {
@@ -137,7 +137,8 @@ export default function App() {
               download
               title="Desktop App herunterladen"
             >
-              {'\u2B07\uFE0F'}
+              <span className="hub-download-icon">{'\u2B07\uFE0F'}</span>
+              <span className="hub-download-label">Desktop App</span>
             </a>
           )}
           <span className="hub-version">v{version}</span>

web/src/styles.css

@@ -189,14 +189,31 @@ html, body {
 }
 
 .hub-download-btn {
-  font-size: 16px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 4px 10px;
+  font-size: 12px;
+  font-weight: 500;
+  font-family: var(--font);
   text-decoration: none;
-  opacity: 0.6;
-  transition: opacity var(--transition);
+  color: var(--text-muted);
+  background: var(--bg-secondary);
+  border-radius: var(--radius);
   cursor: pointer;
+  transition: all var(--transition);
+  white-space: nowrap;
 }
 .hub-download-btn:hover {
-  opacity: 1;
+  color: var(--accent);
+  background: rgba(var(--accent-rgb), 0.1);
+}
+.hub-download-icon {
+  font-size: 14px;
+  line-height: 1;
+}
+.hub-download-label {
+  line-height: 1;
 }
 
 .hub-version {