Add remappable controller controls with a Controller Options tab

Add a player_controls config group that maps game actions to controller
inputs, and a Controller Options menu tab to rebind them in-headset.

- 45 actions: movement, click/double-click, jump, fire, and the engine's own
  keyboard hotkeys (posture, save/load, weapon/MFD select, etc.), sent to the
  engine as synthetic key events. Cheat and dead hotkeys are not exposed.
- Press-to-capture rebinding with per-input exclusivity, Reset to Defaults
  (built-in defaults, then questshock.config.default.json), and new defaults:
  left stick moves/strafes, right stick turns.
- Controller profiles for Touch, Vive and generic OpenXR
  (res/controller_profiles/), matched to the active interaction profile at
  runtime, with a fatal dialog if a profile's bindings are rejected at
  startup.
- The menu's thumbstick locomotion is disabled while the Controller Options
  tab is open or a capture is active. A scrollable list with a tap-to-jump
  scroll bar handles the long action list.
- Opening the menu pauses a running game and resumes it on close.
- Reset Position now keeps the player's facing instead of turning the screen
  to the current gaze.
- Play the intro video in the game's language (engine patch 23), falling back
  to English.
- Watchdog and shared-key handling for stuck movement keys, plus key-edge
  logging.

android/app/src/main/cpp/questshock_native.c

@@ -11,6 +11,7 @@
 #include <SDL.h>
 
 #include "qs_config.h"
+#include "xr_input.h"
 #include "xr_overlay.h"
 #include "xr_session.h"
 
@@ -233,3 +234,39 @@ JNIEXPORT jfloat JNICALL
 Java_de_ladkau_questshock_MenuOverlay_nativeGetGpuUtilization(JNIEnv *env, jclass clazz) {
     return xr_session_get_gpu_utilization();
 }
+
+// Controller Options tab: actionIndex follows xr_input.c's action order
+// (MenuOverlay.java and Strings.java hold the matching labels).
+JNIEXPORT void JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeRequestBeginControlCapture(JNIEnv *env, jclass clazz,
+                                                                         jint actionIndex) {
+    qs_config_request_begin_control_capture(actionIndex);
+}
+
+JNIEXPORT void JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeRequestCancelControlCapture(JNIEnv *env, jclass clazz) {
+    qs_config_request_cancel_control_capture();
+}
+
+JNIEXPORT void JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeRequestResetPlayerControls(JNIEnv *env, jclass clazz) {
+    qs_config_request_reset_player_controls();
+}
+
+JNIEXPORT jstring JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeGetControlBindingKey(JNIEnv *env, jclass clazz,
+                                                                   jint actionIndex) {
+    return (*env)->NewStringUTF(env, xr_input_get_action_binding_name(actionIndex));
+}
+
+JNIEXPORT jstring JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeGetActiveInteractionProfilePath(JNIEnv *env,
+                                                                              jclass clazz) {
+    return (*env)->NewStringUTF(env, xr_input_get_active_interaction_profile_path());
+}
+
+JNIEXPORT void JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeSetControllerOptionsTabOpen(JNIEnv *env, jclass clazz,
+                                                                          jboolean open) {
+    xr_input_set_controller_options_tab_open(open == JNI_TRUE);
+}