feat(app): implement basic function

General
- 配置界面支持配置对象存储桶
- 快捷键进入截图
- 一键上传截图 & 复制截图链接

MacOS
- 状态栏指示器和应用图标

internal/infrastructure/tray/dispatch_darwin.go

@@ -0,0 +1,62 @@
+//go:build darwin
+
+package tray
+
+/*
+#cgo darwin LDFLAGS: -framework Foundation
+#include <dispatch/dispatch.h>
+
+// runOnMainQueue submits the Go-side callback (identified by handle) to the
+// main dispatch queue. We use dispatch_async so the caller — typically a
+// Wails OnStartup goroutine — does not block the cocoa runloop while waiting
+// for the main thread to drain.
+extern void trayDispatchMainCallback(unsigned long handle);
+
+static void runOnMainQueue(unsigned long handle) {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        trayDispatchMainCallback(handle);
+    });
+}
+*/
+import "C"
+
+import (
+	"sync"
+	"sync/atomic"
+)
+
+// dispatchRegistry stores Go closures keyed by an integer handle so that the
+// C side can call back into Go without leaking unsafe.Pointer-cast function
+// pointers (which CGo disallows).
+var (
+	dispatchMu     sync.Mutex
+	dispatchTable  = map[uint64]func(){}
+	dispatchNextID uint64
+)
+
+// dispatchOnMain schedules fn to run on the macOS main thread. This is the
+// Cocoa contract for any API that touches NSWindow / NSStatusBar — calling
+// them from a goroutine triggers the "should only be instantiated on the
+// main thread" assertion.
+func dispatchOnMain(fn func()) {
+	if fn == nil {
+		return
+	}
+	id := atomic.AddUint64(&dispatchNextID, 1)
+	dispatchMu.Lock()
+	dispatchTable[id] = fn
+	dispatchMu.Unlock()
+	C.runOnMainQueue(C.ulong(id))
+}
+
+//export trayDispatchMainCallback
+func trayDispatchMainCallback(handle C.ulong) {
+	id := uint64(handle)
+	dispatchMu.Lock()
+	fn := dispatchTable[id]
+	delete(dispatchTable, id)
+	dispatchMu.Unlock()
+	if fn != nil {
+		fn()
+	}
+}