feat: add screenshot output config, clipboard CLI commands, and fix wait --text native path (#749)

* feat: add screenshot output config, clipboard CLI commands, and fix wait --text native path

## Summary

- Add `--screenshot-dir`, `--screenshot-quality`, and `--screenshot-format` CLI flags (with corresponding `AGENT_BROWSER_SCREENSHOT_DIR`, `AGENT_BROWSER_SCREENSHOT_QUALITY`, `AGENT_BROWSER_SCREENSHOT_FORMAT` env vars) so users can configure where and how screenshots are saved without specifying a full path every time
- Add `clipboard read`, `clipboard write <text>`, `clipboard copy`, and `clipboard paste` CLI commands, exposing the existing protocol-level clipboard handlers that were previously only accessible via JSON-RPC
- Fix `wait --text` in native mode: the CLI was emitting `selector: "text=..."` (a Playwright-style locator) which native's `querySelector` can't handle. Now emits a `text` field that correctly hits the native `wait_for_text` polling path
- Add native clipboard `copy` and `paste` support via CDP `Input.dispatchKeyEvent`, and a `write` operation to the Node.js handler

* fix: resolve CI failures in Rust formatting and TypeScript typecheck

Use string-based page.evaluate for clipboard writeText to avoid
referencing `navigator` in Node.js compilation context. Run cargo fmt
to fix formatting in commands.rs and screenshot.rs.

* fix: clipboard write captures full multi-word text

Use rest[1..].join(" ") instead of rest.get(1) so unquoted multi-word
input like `clipboard write hello world` sends the full string rather
than silently dropping everything after the first word.

* improvements

* fixes

* improvements

* improvements

cli/src/native/screenshot.rs

@@ -57,6 +57,7 @@ pub struct ScreenshotOptions {
     pub format: String,
     pub quality: Option<i32>,
     pub annotate: bool,
+    pub output_dir: Option<String>,
 }
 
 impl Default for ScreenshotOptions {
@@ -68,6 +69,7 @@ impl Default for ScreenshotOptions {
             format: "png".to_string(),
             quality: None,
             annotate: false,
+            output_dir: None,
         }
     }
 }
@@ -145,7 +147,12 @@ pub async fn take_screenshot(
     } else {
         "png"
     };
-    let path = save_screenshot(&base64, options.path.as_deref(), ext)?;
+    let path = save_screenshot(
+        &base64,
+        options.path.as_deref(),
+        ext,
+        options.output_dir.as_deref(),
+    )?;
 
     Ok(ScreenshotResult {
         path,
@@ -479,11 +486,15 @@ fn save_screenshot(
     base64_data: &str,
     explicit_path: Option<&str>,
     ext: &str,
+    output_dir: Option<&str>,
 ) -> Result<String, String> {
     let save_path = match explicit_path {
         Some(path) => path.to_string(),
         None => {
-            let dir = get_screenshot_dir();
+            let dir = match output_dir {
+                Some(d) => PathBuf::from(d),
+                None => get_screenshot_dir(),
+            };
             let _ = std::fs::create_dir_all(&dir);
             let timestamp = std::time::SystemTime::now()
                 .duration_since(std::time::UNIX_EPOCH)