Enhance app update checks with improved error handling and duplicate installation detection

- Updated `AppUpdateProvider` to handle errors during startup checks for app updates and duplicate installations, improving robustness.
- Refactored logic to ensure duplicate installation checks are integrated into the update process, providing clearer feedback to users.
- Adjusted modal visibility conditions for duplicate installation prompts to streamline user experience.

src/components/Dashboard/context/AppUpdateContext.jsx

@@ -308,19 +308,29 @@ export const AppUpdateProvider = ({ children }) => {
     let cancelled = false
 
     const runStartupChecks = async () => {
+      let result = null
+
       try {
-        const result = await checkAppUpdateResult?.()
+        result = await checkAppUpdateResult?.()
         if (!cancelled && result?.updated) {
           setCompletedUpdate(result)
         }
+      } catch (error) {
+        console.warn('[AppUpdateContext] Startup update check failed:', error)
+      }
 
-        const installations = await checkDuplicateInstallations?.()
+      try {
+        const installations =
+          result?.duplicates || (await checkDuplicateInstallations?.())
         if (!cancelled && installations?.duplicatePath) {
           setDuplicateInstall(installations)
           setDuplicatePromptOpen(true)
         }
       } catch (error) {
-        console.warn('[AppUpdateContext] Startup update checks failed:', error)
+        console.warn(
+          '[AppUpdateContext] Duplicate installation check failed:',
+          error
+        )
       }
     }
 
@@ -537,9 +547,7 @@ export const AppUpdateProvider = ({ children }) => {
       </Modal>
       <Modal
         title='Duplicate Installation Found'
-        open={Boolean(
+        open={Boolean(duplicatePromptOpen && duplicateInstall)}
-          duplicatePromptOpen && duplicateInstall && !completedUpdate
-        )}
         style={{ maxWidth: 480 }}
         centered
         closable={!removingDuplicate}

src/desktop/appupdate.js

@@ -7,6 +7,7 @@ import process from "node:process";
 import { Utils } from "electrobun/bun";
 import { launchMacInstaller } from "./macappupdate.js";
 import { launchWindowsInstaller } from "./winappupdate.js";
+import { checkForDuplicateInstallations } from "./check-duplicate-installations.js";
 import { scheduleAppRestart } from "./updater-runner.js";
 import { getAppSettings, setAppSettings } from "./store.js";
 
@@ -266,10 +267,17 @@ export const checkForCompletedUpdate = async (mainWindow) => {
           normalizeEngine(current.engine),
         ));
 
-    completedUpdateResult = { updated, previous, current };
+    const duplicates = checkForDuplicateInstallations();
+
+    completedUpdateResult = { updated, previous, current, duplicates };
   } catch (error) {
     console.warn("[app-update] Failed to check for a completed update.", error);
-    completedUpdateResult = { updated: false, previous: null, current: null };
+    completedUpdateResult = {
+      updated: false,
+      previous: null,
+      current: null,
+      duplicates: checkForDuplicateInstallations(),
+    };
   }
 
   return completedUpdateResult;