always allow tauri cors (#5616)

# Description of Changes

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- Why the change was made
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## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
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### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

app/core/src/main/java/stirling/software/SPDF/config/WebMvcConfig.java

@@ -106,16 +106,29 @@ public class WebMvcConfig implements WebMvcConfigurer {
                     .allowCredentials(true)
                     .maxAge(3600);
         } else if (hasConfiguredOrigins) {
-            // Use user-configured origins
+            // Use user-configured origins + always include Tauri origins for desktop app support
             logger.info(
                     "Configuring CORS with allowed origins: {}",
                     applicationProperties.getSystem().getCorsAllowedOrigins());
 
-            String[] allowedOrigins =
-                    applicationProperties
-                            .getSystem()
-                            .getCorsAllowedOrigins()
-                            .toArray(new String[0]);
+            // Combine user-configured origins with Tauri origins
+            java.util.List<String> allOrigins =
+                    new java.util.ArrayList<>(
+                            applicationProperties.getSystem().getCorsAllowedOrigins());
+
+            // Always include Tauri origins for desktop app compatibility
+            // Tauri v1 uses tauri://localhost, v2 uses http(s)://tauri.localhost
+            if (!allOrigins.contains("tauri://localhost")) {
+                allOrigins.add("tauri://localhost");
+            }
+            if (!allOrigins.contains("http://tauri.localhost")) {
+                allOrigins.add("http://tauri.localhost");
+            }
+            if (!allOrigins.contains("https://tauri.localhost")) {
+                allOrigins.add("https://tauri.localhost");
+            }
+
+            String[] allowedOrigins = allOrigins.toArray(new String[0]);
 
             registry.addMapping("/**")
                     .allowedOriginPatterns(allowedOrigins)