feat(FN-2269): migrate dashboard session selection to global settings

- Add global settings schema/types fields for persisted dashboard session state (selected project and node)
- Refactor NodeContext and current-project hooks to read/write project and node selection via global settings instead of project-local state
- Update App wiring to use the new selection flow across dashboard startup and switching behavior
- Add and expand dashboard tests for NodeContext, useCurrentProject, and view-state persistence behavior

packages/core/src/settings-schema.ts

@@ -47,6 +47,9 @@ export const DEFAULT_GLOBAL_SETTINGS = {
   settingsSyncAuth: false,
   settingsSyncInterval: 900000,
   settingsSyncConflictResolution: "last-write-wins",
+  // Dashboard session state (persisted to global settings for PWA/offline restore)
+  dashboardCurrentNodeId: undefined,
+  dashboardCurrentProjectIdByNode: undefined,
 } satisfies CompleteSettings<GlobalSettings>;
 
 /** Default values for project-level settings. */

packages/core/src/types.ts

@@ -1027,6 +1027,16 @@ export interface GlobalSettings {
    *  - "keep-remote": Accept the remote version on conflict
    *  Default: "last-write-wins". */
   settingsSyncConflictResolution?: "last-write-wins" | "always-ask" | "keep-local" | "keep-remote";
+  /** Currently selected dashboard node ID. Used to restore the last-viewed node
+   *  on fresh browser/PWA sessions. Null or undefined means viewing the local node.
+   *  Persisted to global settings so it survives across browser restarts. */
+  dashboardCurrentNodeId?: string;
+  /** Map of node ID to the last-selected project ID for that node.
+   *  The key is the node ID (use `"local"` for the local node).
+   *  Persisted to global settings so project context is restored on fresh sessions.
+   *  Clear individual entries by setting them to `undefined` (omitting from update).
+   *  Clearing all entries returns the dashboard to overview mode. */
+  dashboardCurrentProjectIdByNode?: Record<string, string>;
 }
 
 /**