Adds first version of the app. Local storage only.

src/data/LocalStorageProjectRepository.ts

@@ -0,0 +1,26 @@
+import type { Project } from '../domain/types'
+import { normalizeProject } from './exportImport'
+import type { ProjectRepository } from './ProjectRepository'
+
+const STORAGE_KEY = 'av-planner:project:v1'
+
+export class LocalStorageProjectRepository implements ProjectRepository {
+  async load(): Promise<Project | null> {
+    try {
+      const raw = window.localStorage.getItem(STORAGE_KEY)
+      if (!raw) return null
+      return normalizeProject(JSON.parse(raw) as Project)
+    } catch (err) {
+      console.error('Failed to load project from localStorage', err)
+      return null
+    }
+  }
+
+  async save(project: Project): Promise<void> {
+    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(project))
+  }
+
+  async clear(): Promise<void> {
+    window.localStorage.removeItem(STORAGE_KEY)
+  }
+}