feat: contract account tab, full i18n, male avatar, PC home stretch

- Asset page: add Contract account row + tab, show num_lh balance
- Total Assets = Spot + Contract + Fiat
- All Chinese text eliminated (z-paging, loadmore, colorui, pages)
- Password/payword pages use image captcha instead of OTP
- Home page PC: full-width stretch layout
- Register captcha input type fix, invite code lock

pages/index/index.vue

@@ -891,4 +891,34 @@
 	.swiper-container ::v-deep .u-swiper-indicator {
 		display: none !important;
 	}
+
+	/* ========== PC 端适配 — 全宽拉伸 ========== */
+	@media screen and (min-width: 768px) {
+		.width-750 {
+			width: 100% !important;
+			max-width: 100% !important;
+		}
+
+		.notice-container {
+			width: calc(100% - 60px) !important;
+			max-width: 100% !important;
+			margin: 0 30px 8px 30px !important;
+		}
+
+		.follow-section {
+			width: calc(100% - 60px) !important;
+			max-width: 100% !important;
+			margin: 0 30px !important;
+		}
+
+		.function-area {
+			width: 100% !important;
+			max-width: 100% !important;
+		}
+
+		.swiper-container {
+			width: 100% !important;
+			max-width: 100% !important;
+		}
+	}
 </style>