fix(auto-update): handle null JSON.parse and restore mocks on test failure

src/hooks/auto-update-checker/checker/sync-package-json.test.ts

@@ -241,6 +241,7 @@ describe("syncCachePackageJsonToIntent", () => {
         renameSync: fs.renameSync,
       }))
 
+      try {
         const { syncCachePackageJsonToIntent } = await import("./sync-package-json")
 
         const pluginInfo: PluginEntryInfo = {
@@ -254,12 +255,13 @@ describe("syncCachePackageJsonToIntent", () => {
 
         expect(result.synced).toBe(false)
         expect(result.error).toBe("write_error")
-
+      } finally {
         mock.module("node:fs", () => ({
           ...fs,
           writeFileSync: originalWriteFileSync,
           renameSync: originalRenameSync,
         }))
+      }
     })
   })
 
@@ -289,6 +291,7 @@ describe("syncCachePackageJsonToIntent", () => {
         }),
       }))
 
+      try {
         const { syncCachePackageJsonToIntent } = await import("./sync-package-json")
 
         const pluginInfo: PluginEntryInfo = {
@@ -304,12 +307,13 @@ describe("syncCachePackageJsonToIntent", () => {
         expect(result.error).toBe("write_error")
         expect(tempFilePath).not.toBeNull()
         expect(existsSync(tempFilePath!)).toBe(false)
-
+      } finally {
         mock.module("node:fs", () => ({
           ...fs,
           writeFileSync: originalWriteFileSync,
           renameSync: originalRenameSync,
         }))
+      }
     })
   })
 })

src/hooks/auto-update-checker/checker/sync-package-json.ts

@@ -57,7 +57,7 @@ export function syncCachePackageJsonToIntent(pluginInfo: PluginEntryInfo): SyncR
     return { synced: false, error: "parse_error", message: "Failed to parse cache package.json (malformed JSON)" }
   }
 
-  if (!pkgJson.dependencies?.[PACKAGE_NAME]) {
+  if (!pkgJson || !pkgJson.dependencies?.[PACKAGE_NAME]) {
     log("[auto-update-checker] Plugin not in cache package.json dependencies, nothing to sync")
     return { synced: false, error: "plugin_not_in_deps", message: "Plugin not in cache package.json dependencies" }
   }