Harden config sync defaults, crash resume, and network nav collapse.

Disable auto-sync by default, enforce single-flight cycles with crash requeue, delay new scheduled runs after restart, and make the network sidebar collapsible.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/i18n/en.ts

@@ -55,6 +55,8 @@ const en = {
       configSync: "Config sync",
       portTraffic: "Port traffic",
     },
+    collapseNav: "Collapse sidebar",
+    expandNav: "Expand sidebar",
     placeholder: {
       title: "Coming soon",
       body: "This capability is not available yet.",

web/src/i18n/zh.ts

@@ -55,6 +55,8 @@ const zh = {
       configSync: "配置同步",
       portTraffic: "端口流量监控",
     },
+    collapseNav: "折叠侧栏",
+    expandNav: "展开侧栏",
     placeholder: {
       title: "功能规划中",
       body: "该能力尚未开放。",