Add a work-in-progress Git History view to the source-control panel.

Display bounded first-parent commit history with asynchronous loading, independent pagination, and lazily expandable merge commits. Propagate inherited exclusions through nested merges to avoid repeating already represented history.
Add custom compact history rows, loading/error/retry states, keyboard navigation, repository and history-generation guards, and lifecycle invalidation after history-changing operations.
Add a commit details tab with full commit metadata and message, changed-line totals, GitHub links when available, and a multi-file diff viewer with global collapse and unified/split controls.
Extend UIDiffView with multi-file view controls and register the required Codicons.
The Git History interface and visual design remain a work in progress.
Fix caret positioning inside shaped ligature clusters.
Add explicit closest-glyph and interpolated ligature caret-positioning modes while keeping interpolation as the default for general text geometry.
Use the original closest-glyph behavior for caret and IME positioning in UICodeEditor, UITextEdit, UITextInput, and UIConsole, preventing cursor positions from being synthesized inside ligature glyphs.
Add regression coverage for both positioning modes.
Optimize SyntaxTokenizer by returning tokenizer results in a SmallVector, avoiding heap allocations in common cases.

src/tools/ecode/plugins/git/gitplugin.hpp

@@ -4,9 +4,11 @@
 #include "../plugin.hpp"
 #include "../pluginmanager.hpp"
 #include "git.hpp"
+#include "githistorymodel.hpp"
 #include <eepp/scene/eventconnection.hpp>
 #include <eepp/scene/mainthreadlifetime.hpp>
 #include <eepp/ui/models/model.hpp>
+#include <eepp/ui/tools/uidiffview.hpp>
 #include <eepp/ui/tools/uimergeview.hpp>
 #include <eepp/ui/uilinearlayout.hpp>
 #include <optional>
@@ -122,6 +124,9 @@ class GitPlugin : public PluginBase {
 	UIPushButton* mStatusButton{ nullptr };
 	UITreeView* mBranchesTree{ nullptr };
 	UITreeView* mStatusTree{ nullptr };
+	UITreeView* mHistoryTree{ nullptr };
+	UITextView* mHistoryRefText{ nullptr };
+	std::shared_ptr<GitHistoryModel> mHistoryModel;
 	UIDropDownList* mPanelSwicher{ nullptr };
 	UIDropDownList* mRepoDropDown{ nullptr };
 	UIStackWidget* mStackWidget{ nullptr };
@@ -132,6 +137,31 @@ class GitPlugin : public PluginBase {
 	UITextView* mConflictStateText{ nullptr };
 	UILoader* mLoader{ nullptr };
 	std::atomic<int> mRunningUpdateBranches{ 0 };
+	std::atomic<int> mRunningHistoryRequests{ 0 };
+	std::atomic<Uint64> mHistoryGeneration{ 0 };
+	std::string mHistoryRepo;
+	bool mHistoryLoaded{ false };
+	UIWidget* mCommitDetailsView{ nullptr };
+	UITextView* mCommitDetailsSubject{ nullptr };
+	UITextView* mCommitDetailsMetadata{ nullptr };
+	UITextView* mCommitDetailsMessage{ nullptr };
+	UITextView* mCommitDetailsParents{ nullptr };
+	UITextView* mCommitDetailsStatus{ nullptr };
+	UIPushButton* mCommitDetailsMessageToggle{ nullptr };
+	UIPushButton* mCommitDetailsFilesToggle{ nullptr };
+	UIPushButton* mCommitDetailsModeToggle{ nullptr };
+	UIPushButton* mCommitDetailsGitHub{ nullptr };
+	UIWidget* mCommitDetailsDiffContainer{ nullptr };
+	UIScrollView* mCommitDetailsDiff{ nullptr };
+	std::string mCommitDetailsMessageBody;
+	std::string mCommitDetailsURL;
+	bool mCommitDetailsMessageExpanded{ false };
+	bool mCommitDetailsFilesCollapsed{ false };
+	Tools::UIDiffView::ViewMode mCommitDetailsViewMode{ Tools::UIDiffView::ViewMode::Unified };
+	Git::Commit mCommitDetailsCommit;
+	std::string mCommitDetailsRepo;
+	std::atomic<Uint64> mCommitDetailsGeneration{ 0 };
+	EventConnection mCommitDetailsCloseConnection;
 	std::atomic<int> mRunningUpdateStatus{ 0 };
 	std::atomic<bool> mPendingForcedStatusUpdate{ false };
 	std::shared_ptr<std::atomic<int>> mRunningAsyncTasks{ std::make_shared<std::atomic<int>>( 0 ) };
@@ -152,7 +182,7 @@ class GitPlugin : public PluginBase {
 	UnorderedMap<std::string, std::unique_ptr<GitConflictSession>> mConflictSessions;
 	std::string mActiveConflictRepo;
 	Tools::UIMergeView* mConflictView{ nullptr };
-	EE::Scene::EventConnection mConflictViewCloseConnection;
+	EventConnection mConflictViewCloseConnection;
 	Uint64 mConflictGeneration{ 0 };
 	Uint32 mRepositionCbId{ 0 };
 
@@ -252,6 +282,22 @@ class GitPlugin : public PluginBase {
 
 	void updateBranches( bool force = false );
 
+	void ensureHistoryLoaded();
+
+	void updateHistoryHeader();
+
+	void reloadHistory();
+
+	void invalidateHistory();
+
+	void loadHistoryPage( GitHistoryModel::Node* node, Git::HistoryQuery query, bool append );
+
+	void activateHistoryIndex( const ModelIndex& index, bool expand );
+
+	void openCommitDetails( const Git::Commit& commit );
+
+	void loadCommitFiles();
+
 	void buildSidePanelTab();
 
 	void updateBranchesUI( std::shared_ptr<GitBranchModel> );
@@ -268,7 +314,7 @@ class GitPlugin : public PluginBase {
 
 	void runAsync( std::function<Git::Result()> fn, bool updateStatus, bool updateBranches,
 				   bool displaySuccessMsg = false, bool updateBranchesOnError = false,
-				   bool updateStatusOnError = false );
+				   bool updateStatusOnError = false, bool historyChanged = false );
 	void runMergeLikeAsync( std::function<Git::Result( Git& )> fn, const std::string& repoPath );
 
 	GitConflictSession* conflictSession( const std::string& repoPath );