[Hotfix] Preview 1.83.7 Release (#784)

# What's changed?
- **[Fix]** [Sophon] Avoid Patch mode accidentally deleting files with
no patch reference, by @neon-nyan
- **[New]** [Sophon] Support / Adding compatibility to Read/Download
Pre-loads From/To HoYoPlay's "Ldiff" folder, by @neon-nyan
> Collapse will now automatically use "Ldiff" folder as its default
destination for reading/downloading pre-load, making Collapse able to
use patch that already been downloaded by HoYoPlay and use it for patch,
or vice versa (Download the pre-load on Collapse, apply on HoYoPlay
later)
- **[Imp]** [Sophon] Reducing I/O overhead and improve read performances
for Patch/Asset checking, by @neon-nyan
- **[Imp]** Update NuGet, by @bagusnl 
  - Microsoft.Web.WebView2: 1.0.3344-prerelease -> 1.0.3415-prerelease
- Microsoft.WindowsAppSDK: 1.8.250515001-experimental2 ->
1.8.250702007-experimental4

### Templates

<details>
  <summary>Changelog Prefixes</summary>
  
  ```
    **[New]**
    **[Imp]**
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Author: neon-nyan

CollapseLauncher/Classes/InstallManagement/Base/InstallManagerBase.Sophon.cs

@@ -249,7 +249,7 @@ await GameVersionManager.GamePreset
                                                                              Token.Token);
 
                         // Ensure that the manifest is ordered based on _gameVoiceLanguageLocaleIdOrdered
-                        RearrangeDataListLocaleOrder(sophonMainInfoPair.OtherSophonBuildData.ManifestIdentityList,
+                        RearrangeDataListLocaleOrder(sophonMainInfoPair.OtherSophonBuildData!.ManifestIdentityList,
                                                      x => x.MatchingField);
 
                         // Add the manifest to the pair list
@@ -356,8 +356,8 @@ await SimpleDialogs.Dialog_ChooseAudioLanguageChoice(
                             Token.Token);
 
                         // Get the remote total size and current total size
-                        ProgressAllCountTotal  = sophonInfoPairList.Sum(x => x.ChunksInfo.FilesCount);
-                        ProgressAllSizeTotal   = sophonInfoPairList.Sum(x => x.ChunksInfo.TotalSize);
+                        ProgressAllCountTotal  = sophonInfoPairList.Sum(x => x.ChunksInfo!.FilesCount);
+                        ProgressAllSizeTotal   = sophonInfoPairList.Sum(x => x.ChunksInfo!.TotalSize);
                         ProgressAllSizeCurrent = 0;
 
                         // Check for the disk space requirement first and ensure that the space is sufficient
@@ -501,7 +501,7 @@ private async Task<List<SophonAsset>> GetSophonAssetListFromPair(
             foreach (SophonChunkManifestInfoPair sophonDownloadInfoPair in sophonInfoPairs)
             {
                 // Try add and if the hashset already contains the same Manifest ID registered, then skip
-                if (!currentlyProcessedPair.Add(sophonDownloadInfoPair.ManifestInfo.ManifestId))
+                if (!currentlyProcessedPair.Add(sophonDownloadInfoPair.ManifestInfo!.ManifestId))
                 {
                     Logger.LogWriteLine($"Found duplicate operation for {sophonDownloadInfoPair.ManifestInfo.ManifestId}! Skipping...",
                                         LogType.Warning, true);
@@ -542,9 +542,9 @@ protected async Task ConfirmAdditionalInstallDataPackageFiles(
                 return;
             }
 
-            List<string> matchingFieldsList = installManifest.Select(x => x.MatchingField).ToList();
+            List<string> matchingFieldsList = installManifest.Select(x => x.MatchingField).ToList()!;
 
-            List<SophonManifestBuildIdentity> otherManifestIdentity = installManifestFirst.OtherSophonBuildData.ManifestIdentityList
+            List<SophonManifestBuildIdentity> otherManifestIdentity = installManifestFirst.OtherSophonBuildData!.ManifestIdentityList
                .Where(x => !commonPackageMatchingFields.Contains(x.MatchingField, StringComparer.OrdinalIgnoreCase))
                .ToList();
 
@@ -1027,7 +1027,7 @@ private async Task TryGetAdditionalPackageForSophonDiff(HttpClient
                 return;
             }
 
-            List<string> additionalPackageMatchingFields = manifestPair.OtherSophonBuildData.ManifestIdentityList
+            List<string> additionalPackageMatchingFields = manifestPair.OtherSophonBuildData!.ManifestIdentityList
                .Where(x => !CommonSophonPackageMatchingFields.Contains(x.MatchingField, StringComparer.OrdinalIgnoreCase))
                .Select(x => x.MatchingField)
                .ToList();
@@ -1081,13 +1081,13 @@ private async Task<bool> AddSophonDiffAssetsToList(HttpClient                 ht
                 return false;
             }
 
-            RearrangeDataListLocaleOrder(requestPairTo.OtherSophonBuildData.ManifestIdentityList,
+            RearrangeDataListLocaleOrder(requestPairTo.OtherSophonBuildData!.ManifestIdentityList,
                                          x => x.MatchingField);
 
             if (requestPairFrom.IsFound)
             {
                 // Ensure that the manifest is ordered based on _gameVoiceLanguageLocaleIdOrdered
-                RearrangeDataListLocaleOrder(requestPairFrom.OtherSophonBuildData.ManifestIdentityList,
+                RearrangeDataListLocaleOrder(requestPairFrom.OtherSophonBuildData!.ManifestIdentityList,
                                              x => x.MatchingField);
 
                 // Add asset to the list

CollapseLauncher/Classes/InstallManagement/Base/InstallManagerBase.SophonPatch.cs

@@ -108,7 +108,7 @@ await SophonPatch.CreateSophonChunkManifestInfoPair(httpClient,
                 SophonDownloadSpeedLimiter.CreateInstance(LauncherConfig.DownloadSpeedLimitCached);
 
             // Get the patch assets to download
-            (List<SophonPatchAsset>, List<SophonChunkManifestInfoPair>) patchAssets =
+            (List<SophonPatchAsset> AssetList, List<SophonChunkManifestInfoPair> InfoPairs, bool IsAllowRemoveOldFile) patchAssets =
                 await GetAlterSophonPatchAssets(httpClient,
                                                 branchResources.PatchUrl,
                                                 (isPreloadMode ? branchResources.PreloadUrl : branchResources.MainUrl) ?? "",
@@ -120,8 +120,9 @@ await GetAlterSophonPatchAssets(httpClient,
             // Start the patch pipeline
             await StartAlterSophonPatch(httpClient,
                                         isPreloadMode,
-                                        patchAssets.Item1,
-                                        patchAssets.Item2,
+                                        patchAssets.AssetList,
+                                        patchAssets.InfoPairs,
+                                        patchAssets.IsAllowRemoveOldFile,
                                         downloadSpeedLimiter,
                                         maxThread,
                                         Token.Token);
@@ -135,7 +136,7 @@ protected virtual async Task ConfirmAdditionalPatchDataPackageFiles(SophonChunkM
         {
             string currentVersion = GameVersion.ToString();
 
-            List<SophonManifestPatchIdentity> otherManifestIdentity = patchManifest.OtherSophonPatchData.ManifestIdentityList
+            List<SophonManifestPatchIdentity> otherManifestIdentity = patchManifest.OtherSophonPatchData!.ManifestIdentityList
                                                                                    .Where(x => !CommonSophonPackageMatchingFields.Contains(x.MatchingField, StringComparer.OrdinalIgnoreCase))
                                                                                    .ToList();
 
@@ -303,7 +304,7 @@ protected async Task<bool> SpawnAdditionalPackageDownloadDialog(long baseDownloa
             return confirmAdditionalTag == ContentDialogResult.Primary;
         }
 
-        protected virtual async Task<(List<SophonPatchAsset>, List<SophonChunkManifestInfoPair>)>
+        protected virtual async Task<(List<SophonPatchAsset> AssetList, List<SophonChunkManifestInfoPair> InfoPairs, bool IsAllowRemoveOldFile)>
             GetAlterSophonPatchAssets(HttpClient httpClient,
                                       string manifestUrl,
                                       string downloadOverUrl,
@@ -315,6 +316,7 @@ protected async Task<bool> SpawnAdditionalPackageDownloadDialog(long baseDownloa
             SophonChunkManifestInfoPair?      rootPatchManifest = null;
             SophonChunkManifestInfoPair?      rootMainManifest  = null;
             List<(SophonChunkManifestInfoPair Patch, SophonChunkManifestInfoPair Main, bool IsCommon)> patchManifestList = [];
+            bool isAlowRemoveOldFile = true;
 
             // Iterate matching fields and get the patch metadata
             foreach (string matchingField in matchingFields)
@@ -338,8 +340,15 @@ protected async Task<bool> SpawnAdditionalPackageDownloadDialog(long baseDownloa
                 Logger.LogWriteLine($"Getting diff for matching field: {matchingField}", LogType.Debug, true);
 
                 // Get the manifest pair based on the matching field
-                SophonChunkManifestInfoPair patchManifest = rootPatchManifest
-                    .GetOtherPatchInfoPair(matchingField, updateVersionfrom);
+                if (!rootPatchManifest
+                       .TryGetOtherPatchInfoPair(matchingField, updateVersionfrom, out var patchManifest))
+                {
+                    Logger.LogWriteLine($"[InstallManagerBase::GetAlterSophonPatchAssets] Cannot find past-version patch manifest for matching field: {matchingField}, Skipping!",
+                                        LogType.Warning,
+                                        true);
+                    isAlowRemoveOldFile = false;
+                    continue;
+                }
 
                 // Get the main manifest pair based on the matching field
                 SophonChunkManifestInfoPair mainManifest = rootMainManifest
@@ -364,18 +373,38 @@ protected async Task<bool> SpawnAdditionalPackageDownloadDialog(long baseDownloa
             {
                 // Get the asset and add it to the list
                 await foreach (SophonPatchAsset patchAsset in SophonPatch
-                    .EnumerateUpdateAsync(httpClient,
-                                          manifestPair.Patch,
-                                          manifestPair.Main,
-                                          updateVersionfrom,
-                                          downloadLimiter,
-                                          token))
+                                  .EnumerateUpdateAsync(httpClient,
+                                                        manifestPair.Patch,
+                                                        manifestPair.Main,
+                                                        updateVersionfrom,
+                                                        downloadLimiter,
+                                                        token))
                 {
                     patchAssets.Add(patchAsset);
                 }
             }
 
-            return (patchAssets, patchManifestList.Select(x => x.Patch).ToList());
+            // Find the removable assets and compare with the added list.
+            List<SophonPatchAsset> removableAssets = [];
+            foreach (var manifestPair in patchManifestList)
+            {
+                // Get the asset and add it to the list
+                await foreach (SophonPatchAsset patchAsset in SophonPatch
+                                  .EnumerateRemovableAsync(httpClient,
+                                                           manifestPair.Patch,
+                                                           manifestPair.Main,
+                                                           updateVersionfrom,
+                                                           patchAssets,
+                                                           token))
+                {
+                    removableAssets.Add(patchAsset);
+                }
+            }
+
+            // Add the removable list to patch assets.
+            patchAssets.AddRange(removableAssets);
+
+            return (patchAssets, patchManifestList.Select(x => x.Patch).ToList(), isAlowRemoveOldFile);
         }
 
         protected virtual async Task<List<string>> GetAlterSophonPatchVOMatchingFields(CancellationToken token)
@@ -403,13 +432,14 @@ protected virtual async Task<List<string>> GetAlterSophonPatchVOMatchingFields(C
             return voAudioMatchingFields;
         }
 
-        protected virtual async Task StartAlterSophonPatch(HttpClient httpClient,
-                                                           bool isPreloadMode,
-                                                           List<SophonPatchAsset> patchAssets,
+        protected virtual async Task StartAlterSophonPatch(HttpClient                        httpClient,
+                                                           bool                              isPreloadMode,
+                                                           List<SophonPatchAsset>            patchAssets,
                                                            List<SophonChunkManifestInfoPair> patchManifestInfoPairs,
-                                                           SophonDownloadSpeedLimiter downloadLimiter,
-                                                           int threadNum,
-                                                           CancellationToken token)
+                                                           bool                              isAllowRemoveOldFile,
+                                                           SophonDownloadSpeedLimiter        downloadLimiter,
+                                                           int                               threadNum,
+                                                           CancellationToken                 token)
         {
             Dictionary<string, int> downloadedPatchHashSet = new();
             Lock dictionaryLock = new();
@@ -435,7 +465,7 @@ protected virtual async Task StartAlterSophonPatch(HttpClient httpClient,
                 parallelOptions.MaxDegreeOfParallelism = Environment.ProcessorCount;
             }
 
-            string patchOutputDir = _gameSophonChunkDir;
+            string patchOutputDir = Path.Combine(GamePath, "ldiff");
 
             // Get download sizes
             long downloadSizeTotalAssetRemote = patchAssets.Where(x => x.PatchMethod != SophonPatchMethod.Remove).Sum(x => x.TargetFileSize);
@@ -555,7 +585,7 @@ async ValueTask ImplPatchUpdate(Tuple<SophonPatchAsset, Dictionary<string, int>>
                 await patchAsset.ApplyPatchUpdateAsync(httpClient,
                                                        GamePath,
                                                        patchOutputDir,
-                                                       true,
+                                                       isAllowRemoveOldFile,
                                                        read =>
                                                        {
                                                            UpdateSophonFileDownloadProgress(0, read);

CollapseLauncher/CollapseLauncher.csproj

@@ -16,7 +16,7 @@
         <Authors>$(Company). neon-nyan, Cry0, bagusnl, shatyuka, gablm.</Authors>
         <Copyright>Copyright 2022-2025 $(Company)</Copyright>
         <!-- Versioning -->
-        <Version>1.83.6</Version>
+        <Version>1.83.7</Version>
         <LangVersion>preview</LangVersion>
         <!-- Target Settings -->
         <Platforms>x64</Platforms>
@@ -197,10 +197,10 @@
         <PackageReference Include="Markdig.Signed" Version="0.41.3" />
         <PackageReference Include="Microsoft.Graphics.Win2D" Version="1.3.2" />
         <PackageReference Include="Microsoft.NETCore.Targets" Version="6.0.0-preview.4.21253.7" />
-        <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.3344-prerelease" />
+        <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.3415-prerelease" />
         <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.2.0" />
         <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.4188" />
-        <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.8.250515001-experimental2" />
+        <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.8.250702007-experimental4" />
         <PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="3.0.0" />
         <PackageReference Include="PhotoSauce.MagicScaler" Version="0.15.0" />
         <PackageReference Include="PhotoSauce.NativeCodecs.Libwebp" Version="*-*" />