update

internal/db/migrations/0007_cluster_servers.sql

@@ -0,0 +1,21 @@
+-- Multi-cluster support: the user can keep several DX cluster nodes saved
+-- and connect to them concurrently. The first enabled row (by sort_order)
+-- is the "master" — commands typed in the UI are sent through it.
+CREATE TABLE cluster_servers (
+    id             INTEGER PRIMARY KEY AUTOINCREMENT,
+    name           TEXT NOT NULL,                    -- "VE7CC", "F4BPO home", …
+    host           TEXT NOT NULL,
+    port           INTEGER NOT NULL DEFAULT 7300,
+    login_override TEXT NOT NULL DEFAULT '',         -- empty = use active profile callsign
+    password       TEXT NOT NULL DEFAULT '',         -- some nodes require one
+    init_commands  TEXT NOT NULL DEFAULT '',         -- newline-separated, sent after login
+    enabled        INTEGER NOT NULL DEFAULT 1,
+    sort_order     INTEGER NOT NULL DEFAULT 0,
+    created_at     TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
+    updated_at     TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
+);
+
+CREATE INDEX idx_cluster_servers_enabled ON cluster_servers(enabled, sort_order);
+
+-- UI options for the Cluster tab. Stored in settings (key/value) as
+-- usual, no migration needed.