Fix game list crash, unresponsive macOS menu, and missing SDL gamepad input (#100)

* game_list: fix crash when scanning games by removing nested event processing

Assisted-by: DeepSeek V4 Pro (root cause diagnosis and fix)
Signed-off-by: QuantumDriftDev <350698041+QuantumDriftDev@users.noreply.github.com>

* macos: fix unresponsive application menu by removing the SDL/Qt event loop conflict

Assisted-by: GPT-6.1 Sol (root cause diagnosis and implementation)
Signed-off-by: QuantumDriftDev <350698041+QuantumDriftDev@users.noreply.github.com>

* input_common: handle SDL gamepad button and axis events

Assisted-by: DeepSeek V4 Pro (implementation)
Signed-off-by: QuantumDriftDev <350698041+QuantumDriftDev@users.noreply.github.com>

---------

Signed-off-by: QuantumDriftDev <350698041+QuantumDriftDev@users.noreply.github.com>

2 files changed, 37 insertions, 0 deletions

diff --git a/src/yuzu/util/macos_sleep.cpp b/src/yuzu/util/macos_sleep.cpp
new file mode 100644
index 0000000000..7525c37dca
--- /dev/null
+++ b/src/yuzu/util/macos_sleep.cpp
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <IOKit/pwr_mgt/IOPMLib.h>
+#include "common/logging.h"
+#include "yuzu/util/macos_sleep.h"
+
+namespace MacOS {
+
+u32 PreventSleep() {
+    IOPMAssertionID assertion_id = kIOPMNullAssertionID;
+    const auto result =
+        IOPMAssertionCreateWithName(kIOPMAssertionTypePreventUserIdleDisplaySleep,
+                                    kIOPMAssertionLevelOn, CFSTR("Running a game"), &assertion_id);
+    if (result != kIOReturnSuccess) {
+        LOG_WARNING(Frontend, "Failed to prevent display sleep: {}", result);
+        return kIOPMNullAssertionID;
+    }
+    return assertion_id;
+}
+
+void AllowSleep(u32 assertion_id) {
+    IOPMAssertionRelease(assertion_id);
+}
+
+} // namespace MacOS
diff --git a/src/yuzu/util/macos_sleep.h b/src/yuzu/util/macos_sleep.h
new file mode 100644
index 0000000000..600dd7c553
--- /dev/null
+++ b/src/yuzu/util/macos_sleep.h
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace MacOS {
+
+u32 PreventSleep();
+void AllowSleep(u32 assertion_id);
+
+} // namespace MacOS