fix: restore PNG embed entries + handle numeric Case.number from EspoCRM

Two issues surfaced from the addin log:

1) The four Klear ribbon PNGs were not in the assembly manifest
   (Available resources listed only the XMLs and Properties.Resources).
   The EmbeddedResource entries for Images got dropped from
   OutlookAddin.csproj during a previous rebase. Re-add them in the same
   spot they had before.

2) MatchingService failed for one of the contacts with:
     System.Text.Json.JsonException at $.list[0].number
     Cannot get the value of a token type Number as a string.
   EspoCRM emits Case.number as a JSON number on installs that use
   auto-increment, and as a string when a custom case-code format is
   configured. Add a small FlexibleStringConverter that reads either
   token type into the same string field, and attach it to
   CaseEntity.Number.

Tests: 39 passing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/OutlookAddin.Core/Json/FlexibleStringConverter.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Globalization;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MarcusLaw.OutlookAddin.Core.Json
+{
+    /// <summary>
+    /// Reads a JSON value as <see cref="string"/> when the source might be
+    /// either a string OR a number (or null). EspoCRM exposes fields such
+    /// as Case.number sometimes as JSON numbers (auto-increment) and
+    /// sometimes as JSON strings (custom case codes) depending on field
+    /// configuration; with a plain <c>string?</c> property the deserializer
+    /// would throw on the numeric form.
+    /// </summary>
+    public sealed class FlexibleStringConverter : JsonConverter<string?>
+    {
+        public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            switch (reader.TokenType)
+            {
+                case JsonTokenType.Null:
+                    return null;
+                case JsonTokenType.String:
+                    return reader.GetString();
+                case JsonTokenType.Number:
+                    if (reader.TryGetInt64(out var l)) return l.ToString(CultureInfo.InvariantCulture);
+                    if (reader.TryGetDouble(out var d)) return d.ToString("R", CultureInfo.InvariantCulture);
+                    return reader.GetDecimal().ToString(CultureInfo.InvariantCulture);
+                case JsonTokenType.True:
+                    return "true";
+                case JsonTokenType.False:
+                    return "false";
+                default:
+                    reader.Skip();
+                    return null;
+            }
+        }
+
+        public override void Write(Utf8JsonWriter writer, string? value, JsonSerializerOptions options)
+        {
+            if (value == null) writer.WriteNullValue();
+            else writer.WriteStringValue(value);
+        }
+    }
+}

src/OutlookAddin.Core/Models/CaseEntity.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
+using MarcusLaw.OutlookAddin.Core.Json;
 
 namespace MarcusLaw.OutlookAddin.Core.Models
 {
@@ -12,7 +13,11 @@ namespace MarcusLaw.OutlookAddin.Core.Models
         [JsonPropertyName("name")]
         public string? Name { get; set; }
 
+        // EspoCRM serializes the case number as a JSON number on some
+        // installs (auto-increment column) and as a string on others
+        // (custom case-code formatter). Accept both.
         [JsonPropertyName("number")]
+        [JsonConverter(typeof(FlexibleStringConverter))]
         public string? Number { get; set; }
 
         [JsonPropertyName("status")]

src/OutlookAddin/OutlookAddin.csproj

@@ -36,7 +36,7 @@
     <PublishUrl>C:\Users\Chaim\source\repos\OutlookAddin\Publish\</PublishUrl>
     <InstallUrl>\\192.168.10.97\Projects\LegalCRM\Add-in\</InstallUrl>
     <TargetCulture>en</TargetCulture>
-    <ApplicationVersion>1.0.0.2</ApplicationVersion>
+    <ApplicationVersion>1.0.0.4</ApplicationVersion>
     <AutoIncrementApplicationRevision>true</AutoIncrementApplicationRevision>
     <UpdateEnabled>true</UpdateEnabled>
     <UpdateInterval>7</UpdateInterval>
@@ -258,6 +258,18 @@
     <EmbeddedResource Include="Ribbon\InspectorRibbon.xml">
       <LogicalName>OutlookAddin.Ribbon.InspectorRibbon.xml</LogicalName>
     </EmbeddedResource>
+    <EmbeddedResource Include="Images\klear-file.png">
+      <LogicalName>OutlookAddin.Images.klear-file.png</LogicalName>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Images\klear-sidebar.png">
+      <LogicalName>OutlookAddin.Images.klear-sidebar.png</LogicalName>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Images\klear-settings.png">
+      <LogicalName>OutlookAddin.Images.klear-settings.png</LogicalName>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Images\klear-compose.png">
+      <LogicalName>OutlookAddin.Images.klear-compose.png</LogicalName>
+    </EmbeddedResource>
     <Compile Include="Services\AddInHost.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -347,7 +359,7 @@
       <FlavorProperties GUID="{BAA0C2D2-18E2-41B9-852F-F413020CAA33}">
         <ProjectProperties HostName="Outlook" HostPackage="{29A7B9D7-A7F1-4328-8EF0-6B2D1A56B2C1}" OfficeVersion="15.0" VstxVersion="4.0" ApplicationType="Outlook" Language="cs" TemplatesPath="" DebugInfoExeName="#Software\Microsoft\Office\16.0\Outlook\InstallRoot\Path#outlook.exe" AddItemTemplatesGuid="{A58A78EB-1C92-4DDD-80CF-E8BD872ABFC4}" />
         <Host Name="Outlook" GeneratedCodeNamespace="OutlookAddin" PublishedHash="69C324AB27932AA2FBF2B7EA72250886FF164DE6" IconIndex="0">
-          <HostItem Name="ThisAddIn" Code="ThisAddIn.cs" CanonicalName="AddIn" CanActivate="false" IconIndex="1" Blueprint="ThisAddIn.Designer.xml" GeneratedCode="ThisAddIn.Designer.cs" PublishedHash="87E42D3CE323366A3FA072C634F27C3D6B959662" />
+          <HostItem Name="ThisAddIn" Code="ThisAddIn.cs" CanonicalName="AddIn" PublishedHash="87E42D3CE323366A3FA072C634F27C3D6B959662" CanActivate="false" IconIndex="1" Blueprint="ThisAddIn.Designer.xml" GeneratedCode="ThisAddIn.Designer.cs" />
         </Host>
       </FlavorProperties>
     </VisualStudio>