fix: protocol-based link matching, hysteria panel support, links cache TTL 1h

- match subscription links by protocol instead of index (fixes trojan/mixed inbounds, e.g. Poland)
- support hysteria panels in create/delete client, skip in shortid rotation
- fix link regex to match hysteria2:// scheme
- reduce links cache TTL from 7 days to 1 hour (stale cache hid servers)
- delete client: fallback to id when uuid missing
- feat(web): telegram contact button on home page

web/css/home.css

@@ -142,6 +142,36 @@ body::before {
 }
 .btn:hover { transform:translateY(-2px); box-shadow:0 8px 32px rgba(108,99,255,0.2) }
 .btn.da { background:linear-gradient(135deg,#f43f5e,#e11d48); color:#fff }
+.btn.tg {
+  position:relative;
+  background:linear-gradient(135deg,#1e96c8,#117a9e);
+  color:#fff;
+  overflow:hidden;
+  isolation:isolate;
+}
+.btn.tg::before {
+  content:'';
+  position:absolute;inset:0;
+  background:linear-gradient(135deg,rgba(255,255,255,0.18) 0%,transparent 50%,rgba(255,255,255,0.06) 100%);
+  opacity:0;
+  transition:opacity .4s;
+}
+.btn.tg::after {
+  content:'';
+  position:absolute;inset:-2px;
+  border-radius:14px;
+  background:linear-gradient(135deg,rgba(30,150,200,0.4),rgba(108,99,255,0.25));
+  z-index:-1;
+  filter:blur(12px);
+  opacity:0;
+  transition:opacity .4s;
+}
+.btn.tg:hover::before { opacity:1 }
+.btn.tg:hover::after { opacity:1 }
+.btn.tg:hover {
+  transform:translateY(-3px);
+  box-shadow:0 8px 32px rgba(30,150,200,0.35),0 0 0 1px rgba(30,150,200,0.3);
+}
 
 .footer { text-align:center; margin-top:40px; color:var(--text-ter); font-size:12px; animation:fadeUp .6s .6s ease-out both }