feat(ql3): establish 3.0 incubation baseline

back/runtime/ports/legacyPanelSessionSource.ts

@@ -0,0 +1,22 @@
+export type LegacyPanelPlatform = 'desktop' | 'mobile';
+
+export interface LegacyPanelSessionSource {
+  isActive(token: string, platform: LegacyPanelPlatform): Promise<boolean>;
+}
+
+export interface LegacyPanelTokenSnapshot {
+  value: string;
+}
+
+export interface LegacyPanelAuthSnapshot {
+  token?: string;
+  tokens?: Readonly<
+    Record<
+      string,
+      string | readonly LegacyPanelTokenSnapshot[] | null | undefined
+    >
+  >;
+}
+
+export type LegacyPanelAuthSnapshotReader =
+  () => Promise<Readonly<LegacyPanelAuthSnapshot> | null>;