连接页：每秒轮询的连接表格，能按入站看、能断开

/connections 没有流式版本，只能全量轮询；断开是运行时动作，不走
落盘那条保护链路。两个容易做反的地方都收在 shared/connections.ts：
chains 数组第一个是最终出口，显示要倒过来；没有连接时 connections
字段是 null 而不是空数组。虚拟滚动用 @tanstack/vue-virtual，ADR 0006
留的两个例外之一，它只有 virtual-core 一个运行时依赖。

bun.lock

@@ -5,6 +5,7 @@
     "": {
       "name": "patchbay",
       "dependencies": {
+        "@tanstack/vue-virtual": "^3.13.35",
         "vue": "^3.5.13",
         "yaml": "^2.9.0",
       },
@@ -153,6 +154,10 @@
 
     "@rollup/rollup-win32-x64-msvc": ["@rollup/rollup-win32-x64-msvc@4.62.4", "", { "os": "win32", "cpu": "x64" }, "sha512-zD6NdeWEByGE9QF9vCrlJ5YQB4oq9q91kPZS37Jwj5hOkvR1lTBSpsKhKDw4IJtbQ35LsTS1HD9DZYGKIshU1Q=="],
 
+    "@tanstack/virtual-core": ["@tanstack/virtual-core@3.17.7", "", {}, "sha512-bp+v10y65sp2H7WpWfIMyxTNfl8ZVfxFTLRjPIFRryi6FV/J33z4IS53WO4pTk36KlvJ4iLiQz+oaydDC1xbcA=="],
+
+    "@tanstack/vue-virtual": ["@tanstack/vue-virtual@3.13.35", "", { "dependencies": { "@tanstack/virtual-core": "3.17.7" }, "peerDependencies": { "vue": "^2.7.0 || ^3.0.0" } }, "sha512-lOfSPvgPdlaH6Qy+CyIc3XpycitaSQ9GECndGpTuDiu+uDA1am+90yWXwzDSd/20ZM196ggWJLS+Qb6WjVd/OA=="],
+
     "@types/bun": ["@types/bun@1.3.14", "", { "dependencies": { "bun-types": "1.3.14" } }, "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw=="],
 
     "@types/estree": ["@types/estree@1.0.9", "", {}, "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg=="],