feat: windows selection behavior, manual ctrl+c (#13315)

packages/opencode/src/cli/cmd/tui/util/selection.ts

@@ -0,0 +1,25 @@
+import { Clipboard } from "./clipboard"
+
+type Toast = {
+  show: (input: { message: string; variant: "info" | "success" | "warning" | "error" }) => void
+  error: (err: unknown) => void
+}
+
+type Renderer = {
+  getSelection: () => { getSelectedText: () => string } | null
+  clearSelection: () => void
+}
+
+export namespace Selection {
+  export function copy(renderer: Renderer, toast: Toast): boolean {
+    const text = renderer.getSelection()?.getSelectedText()
+    if (!text) return false
+
+    Clipboard.copy(text)
+      .then(() => toast.show({ message: "Copied to clipboard", variant: "info" }))
+      .catch(toast.error)
+
+    renderer.clearSelection()
+    return true
+  }
+}