chore: enable IL trim analyzer on Web.Client project (#447)

* chore: enable IL trim analyzer on Web.Client to catch trim issues at build time

Enables EnableTrimAnalyzer and SuppressTrimAnalysisWarnings on the Blazor
WASM project so trim-unsafe patterns surface as build errors (via
TreatWarningsAsErrors) rather than runtime failures after publish.

Suppresses IL2110/IL2111 (framework Razor codegen false positives) and
IL2026 at PersistentComponentState call sites (string serialization is
trim-safe but the API lacks source-generator overloads).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: remove SuppressTrimAnalysisWarnings which also affects ILLink at publish

SuppressTrimAnalysisWarnings=false surfaces warnings from the ILLink
trimmer during publish (IL2026/IL2104 from third-party assemblies),
not just from the Roslyn analyzer. EnableTrimAnalyzer alone is sufficient
for build-time detection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* address review: replace #pragma with [UnconditionalSuppressMessage]

#pragma warning disable only works for the Roslyn analyzer and is
ignored by ILLink during publish. UnconditionalSuppressMessage is
persisted in IL and respected by both.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: bruno-garcia

src/NuGetTrends.Web.Client/NuGetTrends.Web.Client.csproj

@@ -6,6 +6,10 @@
     <Nullable>enable</Nullable>
     <UseSentryCLI>false</UseSentryCLI>
     <StaticWebAssetProjectMode>Default</StaticWebAssetProjectMode>
+    <!-- IL trimming: catch trim-unsafe patterns at build time via Roslyn analyzer -->
+    <EnableTrimAnalyzer>true</EnableTrimAnalyzer>
+    <!-- IL2110/IL2111: false positives from Blazor framework Razor codegen (Router, LayoutView) -->
+    <NoWarn>$(NoWarn);IL2110;IL2111</NoWarn>
   </PropertyGroup>
 
   <!-- IL trimming: remove unused code from published WASM assemblies -->

src/NuGetTrends.Web.Client/Shared/TrendingPackages.razor

@@ -1,3 +1,4 @@
+@using System.Diagnostics.CodeAnalysis
 @using System.Text.Json
 @inject HttpClient Http
 @inject NavigationManager Navigation
@@ -105,6 +106,8 @@
     private string? _errorMessage;
     private PersistingComponentStateSubscription _persistingSubscription;
 
+    [UnconditionalSuppressMessage("Trimming", "IL2026",
+        Justification = "PersistentComponentState lacks source-generator overloads; serializing string is trim-safe.")]
     protected override async Task OnInitializedAsync()
     {
         _persistingSubscription = PersistentState.RegisterOnPersisting(PersistData);
@@ -121,6 +124,8 @@
         }
     }
 
+    [UnconditionalSuppressMessage("Trimming", "IL2026",
+        Justification = "PersistentComponentState lacks source-generator overloads; serializing string is trim-safe.")]
     private Task PersistData()
     {
         PersistentState.PersistAsJson(PersistenceKey,