refactor: remove Terminal.Gui submodule and switch to NuGet package; update version to 0.2.7

docs/changelog/toc.yml

@@ -1,5 +1,9 @@
 - name: Overview
   href: index.md
+- name: v0.2.7
+  href: v0.2.7.md
+- name: v0.2.6
+  href: v0.2.6.md
 - name: v0.2.5
   href: v0.2.5.md
 - name: v0.2.4

docs/changelog/v0.2.6.md

@@ -2,18 +2,8 @@
 
 ## Refactoring
 
-- Extracted `ChatMessageManager` from `MainWindow` — message storage, formatting, and mutation logic now in a dedicated class, reducing MainWindow complexity
-- Split `ChatRenderer.cs` (8 classes, 548 lines) into 7 individual files: `ChatSegment`, `ChatLine`, `ChatListSource`, `ChannelListSource`, `UserListSource`, `ChatColors`, `ColorHelper`, `RenderHelpers`
-- Extracted `ConnectionManager` from `AppOrchestrator` — connection lifecycle, authentication, SignalR event wiring, and channel tracking now in a dedicated service
-- Extracted `AvatarHelper` — deduplicated avatar upload logic previously duplicated in `/avatar` command and profile edit dialog
-- Consolidated `ProfileEditDialog.ParseHexToTrueColor` into shared `ColorHelper.ParseHexToColor`
-- Extracted `UserSession` — session state (`Username`, `Status`, `StatusMessage`) now in a dedicated class instead of scattered fields
-- Replaced 21 inline command handler lambdas with named `HandleCmd*` methods for improved readability
-- Extracted shared `CleanupConnectionAsync` to deduplicate disconnect/logout cleanup logic
-- Reorganized flat `UI/` folder (19 files) into subfolders: `Chat/`, `Dialogs/`, `ListSources/`, `Helpers/` with matching namespaces
-- Moved `AsyncRunner` from project root to `Services/` with updated namespace
-- Renamed `ColorHelper` → `HexColorHelper` to avoid namespace collision with Terminal.Gui's `ColorHelper` NuGet dependency
-- Moved `hue_icon.ico` to `Client/Assets/`, removed duplicate from Server (Server now references shared icon via relative path)
+- Add hex color parsing helper and implement custom list sources for channels and users
+- Add dialogs for connection, channel creation, profile editing, and status management
 
 ## Infrastructure
 

docs/changelog/v0.2.7.md

@@ -0,0 +1,27 @@
+# v0.2.7
+
+## Refactoring
+
+- Extracted `ChatMessageManager` from `MainWindow` — message storage, formatting, and mutation logic now in a dedicated class, reducing MainWindow complexity
+- Split `ChatRenderer.cs` (8 classes, 548 lines) into 7 individual files: `ChatSegment`, `ChatLine`, `ChatListSource`, `ChannelListSource`, `UserListSource`, `ChatColors`, `ColorHelper`, `RenderHelpers`
+- Extracted `ConnectionManager` from `AppOrchestrator` — connection lifecycle, authentication, SignalR event wiring, and channel tracking now in a dedicated service
+- Extracted `AvatarHelper` — deduplicated avatar upload logic previously duplicated in `/avatar` command and profile edit dialog
+- Consolidated `ProfileEditDialog.ParseHexToTrueColor` into shared `ColorHelper.ParseHexToColor`
+- Extracted `UserSession` — session state (`Username`, `Status`, `StatusMessage`) now in a dedicated class instead of scattered fields
+- Replaced 21 inline command handler lambdas with named `HandleCmd*` methods for improved readability
+- Extracted shared `CleanupConnectionAsync` to deduplicate disconnect/logout cleanup logic
+- Reorganized flat `UI/` folder (19 files) into subfolders: `Chat/`, `Dialogs/`, `ListSources/`, `Helpers/` with matching namespaces
+- Moved `AsyncRunner` from project root to `Services/` with updated namespace
+- Renamed `ColorHelper` → `HexColorHelper` to avoid namespace collision with Terminal.Gui's `ColorHelper` NuGet dependency
+- Moved `hue_icon.ico` to `Client/Assets/`, removed duplicate from Server (Server now references shared icon via relative path)
+
+## Bug Fixes
+
+- Fix user list empty on initial connect — `FetchAndUpdateOnlineUsers` was called before `InvokeUI` set the current channel, causing an early return
+
+## Infrastructure
+
+- Switch Terminal.Gui from local fork submodule back to NuGet package (`2.0.0-develop.5039`) — transparent color PR merged upstream
+- Remove Terminal.Gui submodule, `.gitmodules`, and root `nuget.config` workaround
+- Remove `rm -f` submodule nuget.config steps and `submodules: recursive` from all 3 CI workflows (ci, docs, release)
+- Remove `--exclude src/Terminal.Gui/` from format check