Support Ctrl+Enter for sending messages

internal/ui/app.go

@@ -3311,8 +3311,10 @@ func (a *App) handleInsertMode(msg tea.KeyMsg) tea.Cmd {
 			return nil
 		}
 	}
-	// Plain Enter sends; Shift+Enter (and Ctrl+J as a fallback for terminals
-	// Plain Enter sends; modified Enter variants insert a newline.
+	// Plain Enter sends. Ctrl+Enter also sends when the terminal reports it
+	// distinctly, which gives IME users a send key that is less likely to be
+	// consumed as composition commit. Shift/Alt+Enter, backslash+Enter, and
+	// Ctrl+J insert a newline.
 	keystroke := msg.Key().Keystroke()
 	stringForm := msg.String()
 	isModifiedEnter := stringForm == "shift+enter" || keystroke == "shift+enter" || stringForm == "shift+return" || keystroke == "shift+return" || stringForm == "alt+enter" || keystroke == "alt+enter" || stringForm == "alt+return" || keystroke == "alt+return"

internal/ui/app_test.go

@@ -303,6 +303,44 @@ func TestHandleInsertMode_PlainEnterSends(t *testing.T) {
 	}
 }
 
+func TestHandleInsertMode_CtrlEnterSends(t *testing.T) {
+	app := NewApp()
+	app.activeChannelID = "C1"
+	app.focusedPanel = PanelMessages
+	app.SetMode(ModeInsert)
+	app.compose.SetValue("hello")
+
+	cmd := app.handleInsertMode(tea.KeyPressMsg{Code: tea.KeyEnter, Mod: tea.ModCtrl})
+	if cmd == nil {
+		t.Fatalf("Ctrl+Enter with text should return a send cmd")
+	}
+	msg := cmd()
+	if _, ok := msg.(SendMessageMsg); !ok {
+		t.Fatalf("expected SendMessageMsg, got %T", msg)
+	}
+	if app.compose.Value() != "" {
+		t.Fatalf("expected compose to be reset after Ctrl+Enter send, got %q", app.compose.Value())
+	}
+}
+
+func TestHandleInsertMode_ThreadReplyCtrlEnterSends(t *testing.T) {
+	app := NewApp()
+	app.activeChannelID = "C1"
+	app.threadPanel.SetThread(messages.MessageItem{TS: "P1"}, nil, "C1", "P1")
+	app.threadVisible = true
+	app.focusedPanel = PanelThread
+	app.SetMode(ModeInsert)
+	app.threadCompose.SetValue("reply")
+
+	cmd := app.handleInsertMode(tea.KeyPressMsg{Code: tea.KeyEnter, Mod: tea.ModCtrl})
+	if cmd == nil {
+		t.Fatalf("Ctrl+Enter with thread text should return a send cmd")
+	}
+	if _, ok := cmd().(SendThreadReplyMsg); !ok {
+		t.Fatalf("expected SendThreadReplyMsg, got %T", cmd())
+	}
+}
+
 func TestHandleInsertMode_ShiftReturnInsertsNewline(t *testing.T) {
 	app := NewApp()
 	app.activeChannelID = "C1"

wiki/Keybindings.md

@@ -10,7 +10,7 @@
 | `Enter` | Normal (message) | Open thread |
 | `i` / `F2` | Normal | Enter insert mode (`F2` is useful when a CJK IME consumes alphabetic keys for composition) |
 | `Esc` | Insert / Command | Return to normal mode |
-| `Enter` | Insert | Send message |
+| `Enter` / `Ctrl+Enter` | Insert | Send message (`Ctrl+Enter` is useful when IME composition consumes plain Enter) |
 | `Shift+Enter` | Insert | Newline |
 | `Ctrl+V` | Insert | Smart paste — image / file path / text (use `Ctrl+V`, not the terminal's `Ctrl+Shift+V`) |
 | `Ctrl+U` | Insert | Clear compose (text + pending attachments) |