Advanced paste: Add more error handle for foundry local (#43600)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
Foundry local sdk will not run models that is not in catalog, when
catalog removes some, the old ones will fail executing,
so add error hint for users to re-configure the models in settings.

<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist

- [ ] Closes: #xxx
<!-- - [ ] Closes: #yyy (add separate lines for additional resolved
issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
<img width="864" height="216" alt="image"
src="https://github.com/user-attachments/assets/654207b3-ff50-4888-a638-82136216de7b"
/>

src/modules/AdvancedPaste/AdvancedPaste/Services/CustomActions/FoundryLocalPasteProvider.cs

@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using AdvancedPaste.Helpers;
 using AdvancedPaste.Models;
 using LanguageModelProvider;
 using Microsoft.Extensions.AI;
@@ -33,10 +34,6 @@ public sealed class FoundryLocalPasteProvider : IPasteAIProvider
         _config = config;
     }
 
-    public string ProviderName => AIServiceType.FoundryLocal.ToNormalizedKey();
-
-    public string DisplayName => string.IsNullOrWhiteSpace(_config?.Model) ? "Foundry Local" : _config.Model;
-
     public async Task<bool> IsAvailableAsync(CancellationToken cancellationToken)
     {
         cancellationToken.ThrowIfCancellationRequested();
@@ -76,13 +73,20 @@ public sealed class FoundryLocalPasteProvider : IPasteAIProvider
             }
 
             cancellationToken.ThrowIfCancellationRequested();
-            var chatClient = _modelProvider.GetIChatClient(modelReference);
-            if (chatClient is null)
+
+            IChatClient chatClient;
+            try
             {
+                chatClient = _modelProvider.GetIChatClient(modelReference);
+            }
+            catch (InvalidOperationException ex)
+            {
+                // GetIChatClient throws InvalidOperationException for user-facing errors
+                var errorMessage = string.Format(System.Globalization.CultureInfo.CurrentCulture, ResourceLoaderInstance.ResourceLoader.GetString("FoundryLocal_UnableToLoadModel"), modelReference);
                 throw new PasteActionException(
-                    $"Unable to load Foundry Local model: {modelReference}",
-                    new InvalidOperationException("Chat client resolution failed"),
-                    aiServiceMessage: "The model may not be downloaded or the Foundry Local service may not be running. Please check the model status in settings.");
+                    errorMessage,
+                    ex,
+                    aiServiceMessage: ex.Message);
             }
 
             var userMessageContent = $"""

src/modules/AdvancedPaste/AdvancedPaste/Strings/en-us/Resources.resw

@@ -368,4 +368,8 @@
     <value>Local</value>
     <comment>Badge label displayed next to local AI model providers (e.g., Ollama, Foundry Local) to indicate the model runs locally</comment>
   </data>
+  <data name="FoundryLocal_UnableToLoadModel" xml:space="preserve">
+    <value>Unable to load Foundry Local model: {0}</value>
+    <comment>{0} is the model identifier. Do not translate {0}.</comment>
+  </data>
 </root>