fix: Add explicit MIME type configuration for static files

- Configure FileExtensionContentTypeProvider for Blazor assets
- Set correct MIME types: .wasm, .js, .mjs, .json, .svg, .woff, .woff2
- Enable ServeUnknownFileTypes for flexibility
- Fixes 'Empty MIME type' error on Blazor module loading
- Resolves ReconnectModal and dotnet.js loading failures

MIME type mapping:
- .wasm → application/wasm
- .js → application/javascript
- .mjs → application/javascript
- .json → application/json
- .svg → image/svg+xml
- .woff → font/woff
- .woff2 → font/woff2

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/dotnet/QuantEngine.Web/Program.cs

@@ -8,6 +8,7 @@ using QuantEngine.Core.Interfaces;
 using QuantEngine.Application.Services;
 using QuantEngine.Application.Interfaces;
 using System.Text.Json;
+using Microsoft.AspNetCore.StaticFiles;
 using static QuantEngine.Application.Services.DataCollectionService;
 using Serilog;
 using QuantEngine.Web.Client.Infrastructure;
@@ -121,6 +122,23 @@ app.UseStatusCodePages(async ctx =>
 
 app.UseHttpsRedirection();
 
+// Configure static file MIME types for Blazor
+var provider = new FileExtensionContentTypeProvider();
+provider.Mappings[".wasm"] = "application/wasm";
+provider.Mappings[".js"] = "application/javascript";
+provider.Mappings[".mjs"] = "application/javascript";
+provider.Mappings[".json"] = "application/json";
+provider.Mappings[".svg"] = "image/svg+xml";
+provider.Mappings[".woff"] = "font/woff";
+provider.Mappings[".woff2"] = "font/woff2";
+
+app.UseStaticFiles(new StaticFileOptions
+{
+    ContentTypeProvider = provider,
+    ServeUnknownFileTypes = true,
+    DefaultContentType = "application/octet-stream"
+});
+
 app.UseAntiforgery();
 app.UseAuthentication();
 app.UseAuthorization();

src/dotnet/QuantEngine.Web/wwwroot/_framework/dotnet.js

@@ -5,7 +5,7 @@ var e=!1;const t=async()=>WebAssembly.validate(new Uint8Array([0,97,115,109,1,0,
   "mainAssemblyName": "QuantEngine.Web.Client",
   "applicationEnvironment": "Development",
   "resources": {
-    "hash": "sha256-GF7r7nIOeI3J063bMscMxkHPkyz0z2peQDukfM6M9AA=",
+    "hash": "sha256-BbBW2IDSn0CdFcShrDBJDn0eBaTMXAiaarfp1y6lFWk=",
     "jsModuleNative": [
       {
         "name": "dotnet.native.ikrs475e5v.js"
@@ -1254,14 +1254,14 @@ var e=!1;const t=async()=>WebAssembly.validate(new Uint8Array([0,97,115,109,1,0,
       },
       {
         "virtualPath": "QuantEngine.Application.wasm",
-        "name": "QuantEngine.Application.9qbkx9qe02.wasm",
+        "name": "QuantEngine.Application.n4x9btwro5.wasm",
-        "hash": "sha256-n+LsYnNV5pamOyWoF7751imN+T6/3o/betNZTmDBIm8=",
+        "hash": "sha256-906kYBkYAJkZ80yppIUgSbv1/wGdYrbGBn8QhpAJfr4=",
         "cache": "force-cache"
       },
       {
         "virtualPath": "QuantEngine.Core.wasm",
-        "name": "QuantEngine.Core.fjtcuzx1xx.wasm",
+        "name": "QuantEngine.Core.i44o8ctubr.wasm",
-        "hash": "sha256-dUUtuk/3Sq+D/HHVdY3qc1fEYvcEjMsrPhWZbxZiuzk=",
+        "hash": "sha256-Hs1Kn2eitkbbEFeAJgeoc9vfF1zyWpqJ7SvCTk32ct8=",
         "cache": "force-cache"
       },
       {
@@ -1272,28 +1272,28 @@ var e=!1;const t=async()=>WebAssembly.validate(new Uint8Array([0,97,115,109,1,0,
       },
       {
         "virtualPath": "QuantEngine.Web.Client.wasm",
-        "name": "QuantEngine.Web.Client.46e6s1s51k.wasm",
+        "name": "QuantEngine.Web.Client.pdma2c1xbe.wasm",
-        "hash": "sha256-xDLl5C/imN2X6hA/ZRehlbT7FiFksdwYU2yHv8FBK3U=",
+        "hash": "sha256-zdGCsCDg32wjxUCzPmUpZVMYNDMuL1vgELQb8vKxLGA=",
         "cache": "force-cache"
       }
     ],
     "pdb": [
       {
         "virtualPath": "QuantEngine.Core.pdb",
-        "name": "QuantEngine.Core.svjnfkgy0u.pdb",
+        "name": "QuantEngine.Core.b5f9o8o2rh.pdb",
-        "hash": "sha256-mHzMWzrz2+iHyGpoMNApxy6akFJhGvAuQ4s2zpheP+s=",
+        "hash": "sha256-ERM43ExyTsX4AW+yYK1fSfBUMXaXmvvaJ1cIeR/SCiw=",
         "cache": "force-cache"
       },
       {
         "virtualPath": "QuantEngine.Application.pdb",
-        "name": "QuantEngine.Application.7revtw31g8.pdb",
+        "name": "QuantEngine.Application.kv7x4sl21n.pdb",
-        "hash": "sha256-jXaCcUqetbTVj0fTCW4soVlUrGJrHE5Yzb1aVyhayX8=",
+        "hash": "sha256-4BWS2CnkvmzfOpWqZLkmWCs4mxeHLul3OrN6abwzAtU=",
         "cache": "force-cache"
       },
       {
         "virtualPath": "QuantEngine.Web.Client.pdb",
-        "name": "QuantEngine.Web.Client.m7znbxtyme.pdb",
+        "name": "QuantEngine.Web.Client.97rik53991.pdb",
-        "hash": "sha256-/o7OFFiYQrm0GzWXW1CJtBjVW2egit6y5bsgQqmw2Sk=",
+        "hash": "sha256-NZJNG8Bfp8VRV7LXzXQm+NDBra0TwYyOvgMTwrcoHA0=",
         "cache": "force-cache"
       }
     ],