feat(browser): copy extension path to clipboard

src/infra/clipboard.ts

@@ -0,0 +1,23 @@
+import { runCommandWithTimeout } from "../process/exec.js";
+
+export async function copyToClipboard(value: string): Promise<boolean> {
+  const attempts: Array<{ argv: string[] }> = [
+    { argv: ["pbcopy"] },
+    { argv: ["xclip", "-selection", "clipboard"] },
+    { argv: ["wl-copy"] },
+    { argv: ["clip.exe"] }, // WSL / Windows
+    { argv: ["powershell", "-NoProfile", "-Command", "Set-Clipboard"] },
+  ];
+  for (const attempt of attempts) {
+    try {
+      const result = await runCommandWithTimeout(attempt.argv, {
+        timeoutMs: 3_000,
+        input: value,
+      });
+      if (result.code === 0 && !result.killed) return true;
+    } catch {
+      // keep trying the next fallback
+    }
+  }
+  return false;
+}