chore: comments, second pass -- the task codes the first pass missed

The first sweep matched a character class that swallowed the digit, so a bare
B1 slipped through while B1-2 was caught. Searching the whole A-Z space instead
of guessing prefixes turned up 130-odd more: B0 through B6, C2, C3, D1, H2, M6,
P7, P8, T2, W2, plus GP-04, KB-01, OD-1, PM-1, PM-3, SEC-01, TR-4, TR-7, UI-11,
UI-12, XC-8 and API-3.

Kept deliberately: 41 B4 01 is a byte signature, "N0" a format string,
#L119-L128 a source anchor, LS4/LS6 are linkshells, and A=FF B=0C G=41 R=C2
explains a colour-channel order. Those look like codes and are not.

Also translated the eight German comments left in the theme files and
ImGuiUtil. Seven of them described what a palette does to which channel, which
is worth reading -- just not in a second language in an otherwise English
codebase.

HellionChat/Ui/Components/CardClipPlanner.cs

@@ -2,7 +2,7 @@ using System.Collections.Generic;
 
 namespace HellionChat.Ui.Components;
 
-// B2 (PERF-B2): variable-height clip plan. ImGuiListClipper needs a constant
+// Variable-height clip plan. ImGuiListClipper needs a constant
 // row height, and since v1.10.0 neither density has one (compact rows wrap
 // too), so both compute a plan from the cached per-row heights: a lead dummy
 // for the rows above

HellionChat/Ui/Components/ChunkRenderer.cs

@@ -34,11 +34,11 @@ internal sealed class ChunkRenderer
         // names change every plugin reload to avoid stable cross-session linkage.
         _salt = new Random().Next().ToString();
 
-        // Not yet consumed in C2/C3; E-task wiring will likely add log call-sites later.
+        // No call sites yet; logging here will likely come later.
         _ = _logger;
     }
 
-    // B2-1/B2-2 render-observability: the formatted sender text the real draw
+    // render-observability: the formatted sender text the real draw
     // path actually produced (post-ForDisplay). A SelfTest reads this after
     // driving DrawChunks to prove the WorldSuffixMode/NameFormMode reformat
     // reached the real render entry — never the helper in isolation. null until
@@ -52,7 +52,7 @@ internal sealed class ChunkRenderer
         float lineWidth = 0f
     )
     {
-        // UI-7: render a copy with the sender name reformatted per the user's
+        // Render a copy with the sender name reformatted per the user's
         // display options. Skipped in screenshot mode so the name-anonymising
         // path in DrawChunk stays reliable (privacy wins). ForDisplay returns
         // the list unchanged when nothing applies, so non-sender lists and the

HellionChat/Ui/Components/InputBar.cs

@@ -64,7 +64,7 @@ internal sealed class InputBar
     private bool _wasInputTextHovered;
     private bool? _isFocusedOverride; // Test-only; null = honour per-frame Draw() value.
 
-    // UI-11 plugin-disclosure arm-and-hold: holds the buffer that armed the
+    // plugin-disclosure arm-and-hold: holds the buffer that armed the
     // disclosure warning. null = not armed. Compared by value so an edit
     // re-arms and a resend on the identical buffer goes through. 1.5.6 parity
     // (ChatInputBar 1d3b429:27).
@@ -196,7 +196,7 @@ internal sealed class InputBar
         ImGui.SameLine();
         DrawQuickButtons();
 
-        // UI-11: yellow inline warning while a plugin-only-glyph message is
+        // Yellow inline warning while a plugin-only-glyph message is
         // armed-and-held (buffer unchanged since it armed). Renders on its own
         // line below the input row. 1.5.6 parity (ChatInputBar 1d3b429:93-103).
         if (
@@ -589,7 +589,7 @@ internal sealed class InputBar
         if (string.IsNullOrEmpty(text))
             return;
 
-        // UI-11: plugin-disclosure arm-and-hold. Arm + scan on the RAW
+        // Plugin-disclosure arm-and-hold. Arm + scan on the RAW
         // _pendingMessage (NOT the trimmed `text`) so the Draw warning gate
         // (_pendingMessage == _disclosureArmedBuffer) matches byte-for-byte even
         // when the buffer has leading/trailing whitespace. 1.5.6 armed/held/

HellionChat/Ui/Components/MessageList.cs

@@ -18,13 +18,13 @@ internal sealed class MessageList
 
     private PayloadHandler? _handler;
 
-    // B3-5: scroll-to-bottom state. Per-instance, so pop-out windows (own
+    // Scroll-to-bottom state. Per-instance, so pop-out windows (own
     // MessageList instance, PluginHostFactory.cs:263-266) isolate automatically —
     // the old 1.5.6 updateScrollState flag is NOT needed here.
     private bool _scrolledUp;
     private bool _scrollToBottomRequested;
 
-    // B2: the height cache is only valid while these inputs are unchanged.
+    // The height cache is only valid while these inputs are unchanged.
     // FontManager's own fingerprint covers font sizes only, not density / the two
     // name-display modes / width — a stale height would misplace the clipper dummies.
     // Per tab, not per list: the old single field let a width change in tab A mark
@@ -73,12 +73,12 @@ internal sealed class MessageList
         return snap;
     }
 
-    // SelfTest hook (B3-5 reset-invariant, REQUIRED — not optional). Lets
+    // SelfTest hook (reset-invariant, REQUIRED — not optional). Lets
     // ScrollSnapDecisionStep flip the request flag without a real click, so the
     // post-snap reset can be asserted; without it only the OR branch is testable.
     internal void RequestScrollToBottomForSelfTest() => _scrollToBottomRequested = true;
 
-    // SelfTest hook (B2): runs the real planner against a caller fixture so the
+    // SelfTest hook: runs the real planner against a caller fixture so the
     // step asserts the plan without a live scroll child (GetScrollY is garbage headless).
     internal CardClipPlan PlanCardClipForSelfTest(
         IReadOnlyList<float> heights,
@@ -86,7 +86,7 @@ internal sealed class MessageList
         float viewportHeight
     ) => CardClipPlanner.Plan(heights, scrollY, viewportHeight);
 
-    // SelfTest hook (B2): drives the live invalidation, returns the tab's remaining
+    // SelfTest hook: drives the live invalidation, returns the tab's remaining
     // cached-height count so the step can assert the drop. nowMs is a parameter so
     // the step can step past the settle window without sleeping (v1.10.0).
     internal int RunHeightCacheInvalidationForSelfTest(Tab tab, float contentWidth, long nowMs)
@@ -165,7 +165,7 @@ internal sealed class MessageList
 
         MeasureTimestampColumn(tab);
 
-        // B2: drop stale cached heights before the snapshot draw. Both densities
+        // Drop stale cached heights before the snapshot draw. Both densities
         // need this now -- compact rows are not constant height either, they wrap.
         // Width read here while it is valid.
         InvalidateHeightCacheIfLayoutChanged(
@@ -187,7 +187,7 @@ internal sealed class MessageList
         var frozen = _fingerprintGates[tab.Identifier].IsPending;
         DrawRows(tab, messages, compact ? _drawCompactRow : _drawCardRow, frozen);
 
-        // B3-5: scroll values are frame-constant inside the child, so this
+        // Scroll values are frame-constant inside the child, so this
         // reflects the current frame's state wherever it runs; kept after the
         // render to mirror the 1.5.6 end-of-DrawMessageLog placement.
         _scrolledUp = ImGui.GetScrollMaxY() - ImGui.GetScrollY() > 1f;
@@ -282,7 +282,7 @@ internal sealed class MessageList
         ImGui.SetCursorPos(origin with { X = origin.X + _stampColumnWidth });
     }
 
-    // B3-5: Discord-style full-width bar pinned to the bottom edge of the
+    // Discord-style full-width bar pinned to the bottom edge of the
     // visible region while the user is scrolled up. Geometry comes from window
     // pos + size (visible region), never from the content flow: when scrolled
     // up the visible bottom sits above the content bottom, so the
@@ -335,7 +335,7 @@ internal sealed class MessageList
 
     private void DrawCompactRow(Message message, string? previousStamp)
     {
-        // B2-1/B2-2: render the sender through DrawChunks (the name-aware path
+        // Render the sender through DrawChunks (the name-aware path
         // that applies WorldSuffixMode/NameFormMode via ForDisplay), not as a
         // flat SenderSource.TextValue string. message.Sender already carries the
         // channel brackets/colon as ChunkSource.None wrappers (MessageManager
@@ -566,7 +566,7 @@ internal sealed class MessageList
 
     private void DrawCardRow(Message message, string? previousStamp)
     {
-        // B2-1/B2-2: sender via DrawChunks (name-aware path), on its own line
+        // Sender via DrawChunks (name-aware path), on its own line
         // with content below — 1.5.6 card parity (ChatLogWindow.cs:1913, no
         // SameLine after the sender). The 1.5.6 channel-colour push on the
         // sender is deferred styling polish (deferred to v1.9.0); plain

HellionChat/Ui/Components/Settings/Tabs/AboutTab.cs

@@ -133,7 +133,7 @@ internal sealed class AboutTab
         LastHonorificStatusKey = kind.ToString();
         var colors = _themes.Active.Colors;
 
-        // Null-safety via the `is { } v` pattern, never `.Value` raw (spec SEC-2):
+        // Null-safety via the `is { } v` pattern, never `.Value` raw :
         // the version is bound only on the arms that have it; the impossible
         // Detected/Incompatible-without-version state falls through to default.
         switch (kind)

HellionChat/Ui/Components/Settings/ThemePicker.cs

@@ -29,7 +29,7 @@ internal sealed class ThemePicker
             (HellionStrings.Settings_Theme_Category_Retro, new[] { "synthwave-sunset" }, false),
         ];
 
-    // T2 ThemePickerCategoryStep diffs this against ThemeRegistry.BuiltinSlugs
+    // ThemePickerCategoryStep diffs this against ThemeRegistry.BuiltinSlugs
     // to enforce coverage. Kept on the static map so the test does not pierce instance state.
     internal static IEnumerable<string> CategoryMapSlugs => CategoryMap.SelectMany(c => c.Slugs);
 

HellionChat/Ui/Components/Sidebar.cs

@@ -22,7 +22,7 @@ internal sealed class Sidebar
 {
     public const float IconOnlyWidth = 38f;
 
-    // B1-3a: expanded sidebar width is user-configurable (Config.SidebarWidth),
+    // Expanded sidebar width is user-configurable (Config.SidebarWidth),
     // clamped to these bounds (matches the ChannelsTab slider range). Replaces
     // the old fixed 150px ExpandedWidth constant.
     public const float MinSidebarWidth = 40f;
@@ -38,7 +38,7 @@ internal sealed class Sidebar
     // previously active one -- that row was still active when it was painted.
     internal int LastRenderedActiveSurfaceCount { get; private set; }
 
-    // B3-2 render observability: counts greeted glyphs actually drawn this frame.
+    // render observability: counts greeted glyphs actually drawn this frame.
     // Incremented ONLY in the real glyph branch in DrawRow; reset at Draw start.
     // The SelfTest reads it after driving the real Draw — no dead service roundtrip.
     internal int LastRenderedGreetedGlyphCount;
@@ -48,7 +48,7 @@ internal sealed class Sidebar
     // beside it.
     private const float PinGlyphScale = 0.6f;
 
-    // B3-4 render observability: section headers actually drawn this frame.
+    // render observability: section headers actually drawn this frame.
     // Incremented only in the real header branch; reset at Draw start.
     internal int LastDrawnSectionHeaderCount;
 
@@ -149,7 +149,7 @@ internal sealed class Sidebar
         var dimAbgr = ColourUtil.RgbaToAbgr(theme.Colors.TextDim);
         var dl = ImGui.GetWindowDrawList();
 
-        // B3-4 sectioned render order (1.5.6 parity): persistent → pinned
+        // sectioned render order (1.5.6 parity): persistent → pinned
         // TempTabs → unpinned TempTabs. Only the display sequence regroups;
         // the tab list itself stays untouched and every row keeps its
         // ORIGINAL list index for PushID, so an open context-menu popup
@@ -250,7 +250,7 @@ internal sealed class Sidebar
         // Only split off a separate pop-out hit area when there's room for
         // both buttons. Below that, the whole row stays as a single
         // selectable strip without the pop-out affordance.
-        // A3: gate the pop-out affordance on the expanded sidebar too. In
+        // Gate the pop-out affordance on the expanded sidebar too. In
         // icon-only mode avail still clears the width threshold, which used to
         // paint the pop-out glyph over the tab icon. The row stays a single
         // selectable strip when collapsed; right-click pop-out is unaffected.
@@ -476,7 +476,7 @@ internal sealed class Sidebar
             // The hit area sits at the LEFT edge of the row, but the item must
             // be submitted AFTER TabContextMenu.Draw — any interactive item
             // between the row button and the popup call would steal the
-            // right-click trigger (B3-1 ordering constraint).
+            // right-click trigger (ordering constraint).
             ImGui.SetCursorScreenPos(origin);
 
             // CheckCircle = greeted, plain Check = still pending (1.5.6 mapping).

HellionChat/Ui/Components/TabContextMenu.cs

@@ -82,7 +82,7 @@ internal static class TabContextMenu
             ClearPendingRename();
         }
 
-        // Per-tab notification sound (B3-3). The checkbox gates the picker so
+        // Per-tab notification sound. The checkbox gates the picker so
         // tabs that never want a sound keep the popup short.
         if (
             ImGui.Checkbox(

HellionChat/Ui/DbViewer.cs

@@ -36,7 +36,7 @@ public class DbViewer : Window
     private int CurrentPage = 1;
     private string SimpleSearchTerm = "";
 
-    // v1.4.8 H2: opt-in full-text search across the whole DB via FTS5.
+    // v1.4.8: opt-in full-text search across the whole DB via FTS5.
     // Transient UI state (per-session), not persisted -- users opt in fresh
     // every time so they always see the page-filter as the default mode.
     private bool UseFullTextSearch;
@@ -232,7 +232,7 @@ public class DbViewer : Window
             tooltipRight: Language.Page_ArrowRight_Tooltip
         );
 
-        // Full-text search toggle (v1.4.8 H2). IsFtsIndexBuilt is a cached
+        // Full-text search toggle (v1.4.8). IsFtsIndexBuilt is a cached
         // volatile bool in MessageStore -- single field read per frame, no
         // SELECT count(*). ImRaii.Disabled blocks any click while the index
         // is still being built, so no defensive force-off branch needed

HellionChat/Ui/InputPreview.cs

@@ -168,7 +168,7 @@ internal sealed class InputPreview : Window
         {
             ImGui.TextUnformatted(Language.Options_Preview_Header);
 
-            // Primary path (A2) resets the Lender counter in MainWindow.Draw();
+            // Primary path resets the Lender counter in MainWindow.Draw();
             // this fallback covers the edge-case where MainWindow is closed but
             // InputPreview is still open, preventing handler pool growth.
             if (!_mainWindow.IsOpen)

HellionChat/Ui/Windows/ChannelPopoutPool.cs

@@ -44,7 +44,7 @@ internal sealed class ChannelPopoutPool
         // A popped tab gets its own input bar, so strip stale tell state first —
         // otherwise a popped-out stale-tell tab would be a send surface that
         // bypasses the click-path activation strip. Previous = the main window's
-        // active tab; popping the active tab itself must not strip (TR-4 guard).
+        // active tab; popping the active tab itself must not strip (guard).
         TabLifecycleHelpers.OnTabActivated(tab, Plugin.Instance.MainWindow?.ActiveTab);
 
         var slot = _slots.TryReserve(tab.Identifier);

HellionChat/Ui/Windows/ChannelPopoutWindow.cs

@@ -103,7 +103,7 @@ internal sealed class ChannelPopoutWindow : Window, IFocusableChatWindow
     }
 
     // IFocusableChatWindow — this pop-out's own InputBar carries the focus state
-    // the keybind tail checks when deciding whether to route at this surface (C3).
+    // the keybind tail checks when deciding whether to route at this surface.
     public bool HasFocusedInput => _input.IsFocused;
 
     // Arm-and-hold the one-frame Activate flag; the pop-out's Draw applies the

HellionChat/Ui/Windows/MainWindow.cs

@@ -82,14 +82,14 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
         RespectCloseHotkey = false;
     }
 
-    // UI-12: per-window focus-dependent opacity. ResolveBgAlpha stays guard-free
+    // Per-window focus-dependent opacity. ResolveBgAlpha stays guard-free
     // and pure so the self-test can drive it directly; PreDraw owns the guard +
     // wiring. 1.5.6 parity (focused → WindowOpacity, unfocused →
     // WindowOpacityInactive, ChatLogWindow.PreOpenCheck 1d3b429:724).
     internal float ResolveBgAlpha(bool isFocused) =>
         isFocused ? Plugin.Config.WindowOpacity : Plugin.Config.WindowOpacityInactive;
 
-    // B1-2 / P7: rebuild flags from a fresh base every frame so toggling
+    // Rebuild flags from a fresh base every frame so toggling
     // CanMove/CanResize/ShowTitleBar back on actually CLEARS NoMove/NoResize/
     // NoTitleBar (not accumulating). Move/resize/title-bar logic as 1.5.6
     // (ChatLogWindow.PreOpenCheck 1d3b429:703-710); base flags = today's
@@ -240,7 +240,7 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
     }
 
     // IFocusableChatWindow — the keybind tail resolves which surface owns the
-    // input focus before routing a channel-set/REPLY/prefill at it (C3).
+    // input focus before routing a channel-set/REPLY/prefill at it.
     public bool HasFocusedInput => _input.IsFocused;
 
     // Arm-and-hold: field writes only, safe from the framework thread; the draw

HellionChat/Ui/Windows/SettingsWindow.cs

@@ -9,7 +9,7 @@ using Microsoft.Extensions.Logging;
 
 namespace HellionChat.Ui.Windows;
 
-// `internal` to match the Plugin.SettingsWindow property in W2; `public` here
+// `internal` to match the Plugin.SettingsWindow property; `public` here
 // would raise CS0053 against the internal members. Matches MainWindow shape.
 internal sealed class SettingsWindow : Window
 {