chore: bump version to 1.4.6

csproj <Version>, yaml changelog block (v1.4.6 added on top, v1.4.2
rotated out per the slim-4-versions rule), repo.json AssemblyVersion
+ TestingAssemblyVersion + the three DownloadLink URLs + Changelog
string, all in sync.

HellionChat/HellionChat.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Dalamud.NET.Sdk/15.0.0">
     <PropertyGroup>
         <!-- Independent versioning; see yaml changelog for upstream Chat 2 base -->
-        <Version>1.4.5</Version>
+        <Version>1.4.6</Version>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <!-- Use lock file to pin exact versions -->

HellionChat/HellionChat.yaml

@@ -35,6 +35,41 @@ tags:
     - Replacement
     - Privacy
 changelog: |-
+    **v1.4.6 — Code Hygiene and Refactor (2026-05-12)**
+
+    Maintenance patch. No user-visible behaviour changes; tightens the
+    development feedback loop, fixes two upstream-inherited bugs, and
+    prepares the code for the v1.4.7 backlog cleanup.
+
+    - preflight.sh gains a csharpier reflow check and a markdownlint
+      pass so style drift and markdown violations are caught at the
+      pre-push gate
+    - FontManager fallback catches the full set of atlas-toolkit
+      throws (IO, InvalidOperation, ArgumentException) — a corrupt
+      font config no longer takes down the whole atlas build
+    - BrandingLinks and IntegrationLinks URLs validated on plugin
+      load — a typo in a future URL rotation now throws at startup
+    - Cherry-picked from ChatTwo upstream f35b7d3: Chat.SetChannel
+      no longer leaks the native Utf8String when the linkshell check
+      rejects the channel
+    - Cherry-picked from ChatTwo upstream f35b7d3: Tab.Clone now
+      deep-clones UsedChannel and TellTarget — PopOut and Temp tabs
+      no longer mutate each other's channel state
+    - Active-tab underline scales with DPI and rounds to physical
+      pixels for crisp rendering above 100% scaling
+    - IconButton width parameter no longer subtracts HUD-scaled
+      padding from a raw int (measured width passes through verbatim)
+    - Internal: HellionStyle ChildBgAlpha extracted to a testable
+      helper; Plugin.SaveConfig clones only the temp tabs;
+      SettingsOverview caches the draw-list per frame;
+      Dalamud.Utility.Util surface routed through an IPlatformUtil
+      indirection (MessageStore IsWine probe is now testable in
+      isolation)
+
+    Based on Chat 2 1.35.3 (upstream Infiziert90/ChatTwo, EUPL-1.2).
+
+    ---
+
     **v1.4.5 — UX and Robustness (2026-05-12)**
 
     Sixth sub-patch of the v1.4.x polish-sweep series. Chat-log draw
@@ -93,15 +128,4 @@ changelog: |-
 
     ---
 
-    **v1.4.2 — Smoother frames in the chat log**
-
-    Per-frame allocations in the chat-log render path eliminated.
-    2–5% frame-time recovery in typical scenes, more on pop-out-heavy setups.
-
-    - Card-mode: theme/border invariants hoisted out of the per-message loop
-    - Auto-tell tab tint and icon cached per tab
-    - Status bar aggregation runs on ~1% of frames instead of every frame
-
-    ---
-
     Full history: https://gitea.hellion-forge.cloud/JonKazama-Hellion/HellionChat/releases