chore(comments): tighten v1.4.10 inline commentary after self-review

Five trim spots from the cycle's earlier commits — none change behaviour,
just drop redundant phrasing and stale references per the HellionChat
comment-style convention (1-3 lines default, link "same as X" instead of
repeating, file:line refs only where they aid navigation).

SymbolPicker:
- BmpWhitelist header consolidated to source + filter ranges
- ImRaii.Popup pattern links the established ChatLogWindow popup idiom
  instead of citing three call-sites
- ToIconString comment drops the "discoverability" footnote that the
  code already telegraphs
- Manually-wrapping comment drops the "same modern idiom" tail that
  duplicated the preceding sentence

MessageStore:
- Merge the stale pre-v1.4.10 sqlScanLimit comment with the new
  v1.4.10 commentary; the cap mention now describes the historical
  reason rather than a parameter that no longer exists

HellionChat/MessageStore.cs

@@ -997,17 +997,12 @@ internal class MessageStore : IDisposable
         }
     }
 
-    // Returns up to limit tells exchanged with the named player, oldest-first.
-    // SQL narrows by Receiver + ChatType (indexed); client does the final
-    // PlayerPayload comparison. sqlScanLimit caps the scan to stay within
-    // the message-processing worker thread budget.
-    // Walks the full receiver-filtered tell history newest-first and stops
-    // as soon as the per-partner match count reaches `limit`. The previous
-    // hardcoded 500-row scan window cut active users' less-frequent pinned
-    // partners out of the result whenever other partners' chatter pushed
-    // them off the back of the window. Index on (Receiver, Date) keeps the
-    // SQL side cheap; the client-side break bounds the actual decode cost
-    // to roughly the depth at which `limit` partner matches accumulate.
+    // Returns up to `limit` tells exchanged with the named player, oldest-first.
+    // SQL narrows by Receiver + ChatType via the (Receiver, Date) index, then
+    // the client-side loop runs PlayerPayload comparison and breaks once
+    // `limit` partner matches accumulate. Earlier versions had a hardcoded
+    // 500-row scan cap that cut less-frequent pinned partners off the back of
+    // the window in chatty sessions; removed in v1.4.10.
     internal IReadOnlyList<Message> GetTellHistoryWithSender(
         ulong receiver,
         string senderName,

HellionChat/Ui/SymbolPicker.cs

@@ -19,13 +19,10 @@ internal sealed class SymbolPicker
     private string _search = string.Empty;
     private readonly List<uint> _recentUsed = new(capacity: RecentCapacity);
 
-    // FFXIV server-safe BMP symbols, verified 2026-05-16 via /echo + /say
-    // round-trip across four probe rounds (140 candidates tested, 43 filtered).
-    // Range U+2694-26C4 (Misc Symbols Extended), U+2700+ (Dingbats Extended),
-    // diagonal arrows, vulgar fractions U+2153+, and chess pieces all get
-    // dropped by the server, so they're not exposed here.
-    // Source-of-truth for this list lives in
-    // Projekte/FFXIV/Hellion Chat/Cycles/v1.4.10 BMP-Whitelist Notes.md.
+    // FFXIV server-safe BMP symbols, verified 2026-05-16 via /echo + /say.
+    // Filtered ranges: U+2694-26C4 (Misc Symbols Extended), U+2700+ (Dingbats
+    // Extended), diagonal arrows, U+2153+ fractions, chess pieces.
+    // Full probe log: Cycles/v1.4.10 BMP-Whitelist Notes.md.
     private static readonly (uint Codepoint, string Name)[] BmpWhitelist = new[]
     {
         (0x00A1u, "Inverted Exclamation"),
@@ -134,8 +131,8 @@ internal sealed class SymbolPicker
     // chat-input buffer at the current cursor position.
     public string? DrawAndConsume()
     {
-        // ImRaii.Popup mirrors ChatLogWindow.cs:823 / :2380, PayloadHandler.cs:68
-        // — auto-EndPopup via using-Dispose.
+        // ImRaii.Popup auto-disposes EndPopup, same idiom as other popups in
+        // ChatLogWindow.
         using var popup = ImRaii.Popup(PopupId);
         if (!popup)
             return null;
@@ -202,10 +199,8 @@ internal sealed class SymbolPicker
                     continue;
                 }
 
-                // ToIconString() returns the single-codepoint string ready for
-                // ImGui rendering (Dalamud SeIconCharExtensions.cs:25). Tooltip
-                // carries the enum name so users can discover what each glyph
-                // means.
+                // ToIconString gives the single-codepoint glyph; tooltip
+                // carries the enum name for discoverability.
                 if (ImGui.Selectable(
                         icon.ToIconString(),
                         false,
@@ -217,10 +212,9 @@ internal sealed class SymbolPicker
                 if (ImGui.IsItemHovered())
                     ImGui.SetTooltip(label);
 
-                // Manually-wrapping pattern from imgui_demo.cpp on modern API.
-                // GetWindowContentRegionMax is obsolete since ImGui 1.92
-                // (imgui.h:565); HellionChat uses GetContentRegionAvail
-                // throughout (e.g. ChatLogWindow.cs:840). Same modern idiom.
+                // Manually-wrapping pattern from imgui_demo.cpp;
+                // GetWindowContentRegionMax obsolete since ImGui 1.92, use
+                // GetContentRegionAvail (see ChatLogWindow.cs:840).
                 var style = ImGui.GetStyle();
                 var lastItemX2 = ImGui.GetItemRectMax().X;
                 var availableRightX =