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Anso
1a03cf82af
The default mesh subnet 172.30.0.0/24 is fully contained in linuxserver/* default networks (sonarr_default 172.30.0.0/16, etc.), so libnetwork rejects the IPAM allocation with "Pool overlaps with other one on this address space" on a typical homelab Docker host. The single hard-coded default left first-run operators with a silently broken mesh. MeshService.setupMeshNetwork now resolves the subnet via three paths: 1. Operator-explicit (SENCHO_MESH_SUBNET set): use that subnet, strict. Pre-existing sencho_mesh with a different subnet still raises subnet_mismatch. 2. Adopt-existing (env unset, sencho_mesh already on the daemon): adopt the existing subnet. Docker is the source of truth across restarts. 3. Candidate iteration (env unset, no existing network): walk 172.30.0.0/24, 172.31.0.0/24, 10.42.0.0/24, 10.43.0.0/24 in order. First subnet Docker accepts wins. If every candidate overlaps, record subnet_overlap with a message naming every attempt. The dashboard's Fleet Heartbeat card now surfaces the down state via a compact banner above the per-node rows, plus a "mesh down" counter suffix on the right of the title. The existing Routing-tab banner is extracted into a shared MeshDataPlaneBanner component with tab and card variants. Dashboard polling is gated on Admiral tier so non-paid users do not fire the Admiral-only /mesh/status endpoint. Six new tests in mesh-setup-error-classification cover: iterates past first overlap, all candidates overlap, adopts existing network, inspectNetwork non-404 failure classified as attach_failed, env-matches- existing skip-create, and operator-explicit strict (no fallback). Fixes F-1 in the pre-1.0 audit. Closes the silent-failure mode that left the mesh down on the most common homelab Docker layout.