Fix Shift+Enter in terminal input modes (#999)

* Fix Shift+Enter terminal input modes

* Advertise terminal input capabilities

packages/app/src/components/terminal-pane.tsx

@@ -10,6 +10,7 @@ import {
 import Animated, { runOnJS, useAnimatedReaction } from "react-native-reanimated";
 import { StyleSheet, useUnistyles } from "react-native-unistyles";
 import { encodeTerminalKeyInput } from "@server/shared/terminal-key-input";
+import type { TerminalInputModeState } from "@server/shared/terminal-input-mode";
 import { useHostRuntimeClient, useHostRuntimeIsConnected } from "@/runtime/host-runtime";
 import { useKeyboardShiftStyle } from "@/hooks/use-keyboard-shift-style";
 import { useAppVisible } from "@/hooks/use-app-visible";
@@ -188,6 +189,10 @@ export function TerminalPane({
   const [resizeRequestToken, setResizeRequestToken] = useState(0);
   const emulatorRef = useRef<TerminalEmulatorHandle>(null);
   const terminalIdRef = useRef<string>(terminalId);
+  const inputModeRef = useRef<TerminalInputModeState>({
+    kittyKeyboardFlags: 0,
+    win32InputMode: false,
+  });
   const pendingTerminalInputRef = useRef<PendingTerminalInput[]>([]);
   const keyboardRefitTimeoutsRef = useRef<Array<ReturnType<typeof setTimeout>>>([]);
   const lastAutoFocusKeyRef = useRef<string | null>(null);
@@ -195,6 +200,10 @@ export function TerminalPane({
 
   useEffect(() => {
     terminalIdRef.current = terminalId;
+    inputModeRef.current = {
+      kittyKeyboardFlags: 0,
+      win32InputMode: false,
+    };
   }, [terminalId]);
 
   const requestTerminalFocus = useCallback(() => {
@@ -413,7 +422,9 @@ export function TerminalPane({
         return true;
       }
 
-      const encoded = encodeTerminalKeyInput(entry.input);
+      const encoded = encodeTerminalKeyInput(entry.input, {
+        inputMode: inputModeRef.current,
+      });
       if (encoded.length === 0) {
         return true;
       }
@@ -595,6 +606,10 @@ export function TerminalPane({
     clearPendingModifiers();
   }, [clearPendingModifiers]);
 
+  const handleInputModeChange = useCallback((state: TerminalInputModeState) => {
+    inputModeRef.current = state;
+  }, []);
+
   const toggleModifier = useCallback(
     (modifier: keyof ModifierState) => {
       setModifiers((current) => ({ ...current, [modifier]: !current[modifier] }));
@@ -674,6 +689,7 @@ export function TerminalPane({
               onInput={handleTerminalData}
               onResize={handleTerminalResize}
               onTerminalKey={handleTerminalKey}
+              onInputModeChange={handleInputModeChange}
               onPendingModifiersConsumed={handlePendingModifiersConsumed}
               pendingModifiers={modifiers}
               focusRequestToken={focusRequestToken}