feat: add multi-session desktop workspace

ui/src/workspace/persistence.ts

@@ -0,0 +1,56 @@
+import { invoke } from "@tauri-apps/api/core";
+import type { UiState, WorkspaceState } from "./types";
+
+export const selectedPathKey = "pi-status-ui.selected-worktree";
+export const uiScaleKey = "pi-status-ui.interface-scale";
+
+export function presentationState(state: WorkspaceState): UiState {
+	const drafts: Record<string, string> = {};
+	const scroll: UiState["scroll"] = {};
+	const lastSeen: UiState["lastSeen"] = {};
+	for (const [id, runtime] of Object.entries(state.runtimesById)) {
+		if (runtime.draft) drafts[id] = runtime.draft;
+		scroll[id] = runtime.scroll;
+		if (!runtime.unread && state.bridge.instanceId)
+			lastSeen[id] = {
+				bridgeInstanceId: state.bridge.instanceId,
+				seq: state.bridge.latestSeq,
+				lastActivity: runtime.summary.lastActivity,
+			};
+	}
+	return {
+		version: 1,
+		directoryOrder: state.directoryOrder,
+		runtimeOrderByDirectory: state.runtimeOrderByDirectory,
+		selectedRuntimeId: state.selectedRuntimeId,
+		drafts,
+		scroll,
+		lastSeen,
+		workspaceCursor: state.bridge.instanceId
+			? {
+					bridgeInstanceId: state.bridge.instanceId,
+					seq: state.bridge.latestSeq,
+				}
+			: undefined,
+		interfaceScale: state.interfaceScale,
+		dismissedCollisionWarning: state.dismissedCollisionWarning,
+	};
+}
+
+export async function loadPresentation() {
+	return invoke<UiState>("load_ui_state");
+}
+export async function savePresentation(state: UiState) {
+	await invoke("save_ui_state", { state });
+}
+export function legacyPreferences(storage: Pick<Storage, "getItem">) {
+	const path = storage.getItem(selectedPathKey) ?? undefined;
+	const raw = Number(storage.getItem(uiScaleKey));
+	const scale =
+		Number.isFinite(raw) && raw >= 0.9 && raw <= 1.4 ? raw : undefined;
+	return { path, scale };
+}
+export function removeLegacyPreferences(storage: Pick<Storage, "removeItem">) {
+	storage.removeItem(selectedPathKey);
+	storage.removeItem(uiScaleKey);
+}