feat: ship usable local v1 with demo, workers, approvals, and docker support

src/store.ts

@@ -1,4 +1,4 @@
-import { existsSync, mkdirSync, readFileSync, writeFileSync } from "node:fs";
+import { copyFileSync, existsSync, mkdirSync, readFileSync, renameSync, writeFileSync } from "node:fs";
 import { dirname } from "node:path";
 import type { AppState } from "./types.js";
 
@@ -15,8 +15,12 @@ function defaultState(): AppState {
 
 export class FileStore {
   private state: AppState;
+  private readonly backupFilePath: string;
+  private readonly tempFilePath: string;
 
   constructor(private readonly filePath: string) {
+    this.backupFilePath = `${filePath}.bak`;
+    this.tempFilePath = `${filePath}.tmp`;
     this.ensureDirectory();
     this.state = this.load();
   }
@@ -42,20 +46,28 @@ export class FileStore {
   }
 
   private load(): AppState {
-    if (!existsSync(this.filePath)) {
-      return defaultState();
+    for (const path of [this.filePath, this.backupFilePath]) {
+      if (!existsSync(path)) {
+        continue;
+      }
+
+      try {
+        const raw = readFileSync(path, "utf8");
+        return { ...defaultState(), ...(JSON.parse(raw) as AppState) };
+      } catch {
+        // try backup/default
+      }
     }
 
-    try {
-      const raw = readFileSync(this.filePath, "utf8");
-      return { ...defaultState(), ...(JSON.parse(raw) as AppState) };
-    } catch {
-      return defaultState();
-    }
+    return defaultState();
   }
 
   private save(): void {
-    writeFileSync(this.filePath, `${JSON.stringify(this.state, null, 2)}\n`, "utf8");
+    const content = `${JSON.stringify(this.state, null, 2)}\n`;
+    writeFileSync(this.tempFilePath, content, "utf8");
+    if (existsSync(this.filePath)) {
+      copyFileSync(this.filePath, this.backupFilePath);
+    }
+    renameSync(this.tempFilePath, this.filePath);
   }
 }
-