docs: unify documentation and streamline code comments

- Translated project documentation (LEARNING-JOURNEY, CONTRIBUTORS, AI_DISCLOSURE) to English for better accessibility.
- Standardized internal code documentation by converting XML-doc blocks to standard comment format.
- Cleaned up inline comments and removed redundant versioning metadata across the codebase.
- Refactored non-functional text elements to improve readability and maintain a consistent style.

HellionChat/Ipc/ExtraChat.cs

@@ -26,10 +26,9 @@ public sealed class ExtraChat : IDisposable
 
     internal (string, uint)? ChannelOverride { get; set; }
 
-    // Volatile reference: IPC callbacks (OnChannelCommandColours/OnChannelNames) fire on a
-    // Dalamud-dispatcher thread while the ImGui thread reads the IReadOnlyDictionary projections.
-    // Reference assignment is atomic on x64, but the JIT (especially Mono on Wine/Linux) needs
-    // the volatile barrier to guarantee visibility across threads. See AUDIT-2026-05-05 [SEC-01].
+    // volatile: IPC callbacks fire on a Dalamud thread while ImGui reads these.
+    // Reference assignment is atomic on x64, but the barrier ensures visibility
+    // across threads (especially Mono/Wine). See AUDIT-2026-05-05 [SEC-01].
     private volatile Dictionary<string, uint> ChannelCommandColoursInternal = new();
     internal IReadOnlyDictionary<string, uint> ChannelCommandColours =>
         ChannelCommandColoursInternal;
@@ -54,6 +53,7 @@ public sealed class ExtraChat : IDisposable
         OverrideChannelGate.Subscribe(OnOverrideChannel);
         ChannelCommandColoursGate.Subscribe(OnChannelCommandColours);
         ChannelNamesGate.Subscribe(OnChannelNames);
+
         try
         {
             ChannelCommandColoursInternal = ChannelCommandColoursGate.InvokeFunc(null!);
@@ -61,7 +61,7 @@ public sealed class ExtraChat : IDisposable
         }
         catch (Exception ex)
         {
-            // ExtraChat is optional; missing IPC peer is normal when the plugin isn't loaded.
+            // ExtraChat is optional; IPC failure is normal when the plugin isn't loaded.
             Plugin.Log.Verbose(ex, "ExtraChat IPC initial state query failed (peer not loaded?)");
         }
     }
@@ -75,22 +75,11 @@ public sealed class ExtraChat : IDisposable
 
     private void OnOverrideChannel(OverrideInfo info)
     {
-        if (info.Channel == null)
-        {
-            ChannelOverride = null;
-            return;
-        }
-
-        ChannelOverride = (info.Channel, info.Rgba);
+        ChannelOverride = info.Channel == null ? null : (info.Channel, info.Rgba);
     }
 
-    private void OnChannelCommandColours(Dictionary<string, uint> obj)
-    {
+    private void OnChannelCommandColours(Dictionary<string, uint> obj) =>
         ChannelCommandColoursInternal = obj;
-    }
 
-    private void OnChannelNames(Dictionary<Guid, string> obj)
-    {
-        ChannelNamesInternal = obj;
-    }
+    private void OnChannelNames(Dictionary<Guid, string> obj) => ChannelNamesInternal = obj;
 }