fix: Commands now completable when not starting with / (#4846)

* Add commands to completable inputs when no prefix

src/controllers/completion/TabCompletionModel.hpp

@@ -30,7 +30,13 @@ public:
     void updateResults(const QString &query, bool isFirstWord = false);
 
 private:
-    enum class SourceKind { Emote, User, Command, EmoteAndUser };
+    enum class SourceKind {
+        Emote,
+        User,
+        Command,
+        EmoteCommand,
+        EmoteUserCommand
+    };
 
     /// @brief Updates the internal completion source based on the current query.
     /// The completion source will only change if the deduced completion kind
@@ -47,6 +53,10 @@ private:
 
     std::unique_ptr<completion::Source> buildSource(SourceKind kind) const;
 
+    std::unique_ptr<completion::Source> buildEmoteSource() const;
+    std::unique_ptr<completion::Source> buildUserSource() const;
+    std::unique_ptr<completion::Source> buildCommandSource() const;
+
     Channel &channel_;
     std::unique_ptr<completion::Source> source_{};
     std::optional<SourceKind> sourceKind_{};