docs/boxes: Prioritize hardware details

Place physical hardware inventories and VPS resource allocations near
the top of each box page, while leaving broader platform details in
their topical sections.

docs/remote/britnet.md

@@ -7,6 +7,14 @@ narrower gateway role than [`britway`](britway.md) (no control plane, no BGP).
 - **Host:** VPS (Birmingham, `bhx1`; provider uplink assignment `allhost`)
 - **nixpkgs:** `mine`
 
+## Platform
+
+| Component | Allocation |
+|---|---|
+| Virtualisation | KVM/QEMU guest |
+| Compute | 2 vCPUs and 2 GiB RAM |
+| Storage | 32 GiB virtio disk with separate ext4 filesystems for `/boot`, `/nix` and `/persist`; root is tmpfs |
+
 ## Role
 
 - **Tailscale exit node** — logs into the headscale on [`britway`](britway.md)
@@ -20,14 +28,6 @@ narrower gateway role than [`britway`](britway.md) (no control plane, no BGP).
 
 See the consolidated [network assignments](../networking.md#box-assignments) table (this box: `britnet`).
 
-## Platform
-
-| Component | Allocation |
-|---|---|
-| Virtualisation | KVM/QEMU guest |
-| Compute | 2 vCPUs and 2 GiB RAM |
-| Storage | 32 GiB virtio disk with separate ext4 filesystems for `/boot`, `/nix` and `/persist`; root is tmpfs |
-
 ## Networking
 
 - The provider interface is renamed to `veth0` by MAC. Its IPv6 default gateway sits off-subnet, so