feat(tauri): Migrate from Tauri v1 to v2

# Summary
This commit completes the migration from Tauri v1 to v2, resolves configuration issues, upgrades Next.js, and adds test coverage for critical components to ensure stability during the transition.

# Details
## Tauri v2 Migration
- Updated Tauri dependencies to v2.3.0 series in package.json
- Restructured build configuration in `/app/config/build.ts` to align with Tauri v2 requirements
- Fixed imports and API usage patterns across the codebase
- Added compatibility layer for window.__TAURI__ references to maintain backward compatibility

## Next.js Issues
- Upgraded Next.js from 14.1.1 to 14.2.24
- Resolved caching problems with Server Actions
- Updated eslint-config-next to match the new version
- Cleared Next.js cache and temporary files to address build issues

## Testing & Stability
- Added comprehensive tests for `stream.ts` to verify streaming functionality
- Created mocks for Tauri API to support test environment
- Verified that critical functionality continues to work correctly
- Translated all comments to English for consistency

## Infrastructure
- Fixed peer dependency warnings during installation
- Ensured proper integration with Tauri v2 plugins (clipboard-manager, dialog, fs, http, notification, shell, updater, window-state)

# Approach
Prioritized stability by:
1. Making minimal necessary changes to configuration files
2. Preserving most `window.__TAURI__` calls as they still function in v2
3. Planning gradual migration to new APIs with test coverage for critical components
4. Documenting areas that will require future attention

# Testing
- Created unit tests for critical streaming functionality
- Performed manual testing of key application features
- Verified successful build and launch with Tauri v2

# Future Work
- Future PRs will gradually replace deprecated Tauri v1 API calls with v2 equivalents
- Additional test coverage will be added for other critical components

app/store/update.ts

@@ -10,6 +10,11 @@ import { clientUpdate } from "../utils";
 import ChatGptIcon from "../icons/chatgpt.png";
 import Locale from "../locales";
 import { ClientApi } from "../client/api";
+import {
+  isPermissionGranted,
+  requestPermission,
+  sendNotification,
+} from "@tauri-apps/plugin-notification";
 
 const ONE_MINUTE = 60 * 1000;
 const isApp = !!getClientConfig()?.isApp;
@@ -90,42 +95,39 @@ export const useUpdateStore = createPersistStore(
           remoteVersion: remoteId,
         }));
         if (window.__TAURI__?.notification && isApp) {
-          // Check if notification permission is granted
-          await window.__TAURI__?.notification
-            .isPermissionGranted()
-            .then((granted) => {
-              if (!granted) {
-                return;
-              } else {
-                // Request permission to show notifications
-                window.__TAURI__?.notification
-                  .requestPermission()
-                  .then((permission) => {
-                    if (permission === "granted") {
-                      if (version === remoteId) {
-                        // Show a notification using Tauri
-                        window.__TAURI__?.notification.sendNotification({
-                          title: "NextChat",
-                          body: `${Locale.Settings.Update.IsLatest}`,
-                          icon: `${ChatGptIcon.src}`,
-                          sound: "Default",
-                        });
-                      } else {
-                        const updateMessage =
-                          Locale.Settings.Update.FoundUpdate(`${remoteId}`);
-                        // Show a notification for the new version using Tauri
-                        window.__TAURI__?.notification.sendNotification({
-                          title: "NextChat",
-                          body: updateMessage,
-                          icon: `${ChatGptIcon.src}`,
-                          sound: "Default",
-                        });
-                        clientUpdate();
-                      }
-                    }
-                  });
-              }
-            });
+          try {
+            // Check if notification permission is granted
+            const granted = await isPermissionGranted();
+            if (!granted) {
+              // Request permission to show notifications
+              const permission = await requestPermission();
+              if (permission !== "granted") return;
+            }
+
+            if (version === remoteId) {
+              // Show a notification using Tauri
+              await sendNotification({
+                title: "NextChat",
+                body: `${Locale.Settings.Update.IsLatest}`,
+                icon: `${ChatGptIcon.src}`,
+                sound: "Default",
+              });
+            } else {
+              const updateMessage = Locale.Settings.Update.FoundUpdate(
+                `${remoteId}`,
+              );
+              // Show a notification for the new version using Tauri
+              await sendNotification({
+                title: "NextChat",
+                body: updateMessage,
+                icon: `${ChatGptIcon.src}`,
+                sound: "Default",
+              });
+              clientUpdate();
+            }
+          } catch (error) {
+            console.error("[Notification Error]", error);
+          }
         }
         console.log("[Got Upstream] ", remoteId);
       } catch (error) {