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/interaction.rs

@@ -206,6 +206,22 @@ pub async fn type_text(
 }
 
 pub async fn press_key(client: &CdpClient, session_id: &str, key: &str) -> Result<(), String> {
+    press_key_with_modifiers(client, session_id, key, None).await
+}
+
+/// Dispatch a keyDown+keyUp sequence for `key` with an optional CDP modifier bitmask.
+///
+/// Modifier values follow the CDP `Input.dispatchKeyEvent` spec:
+/// 1 = Alt, 2 = Control, 4 = Meta (Cmd), 8 = Shift.
+///
+/// Callers that need a platform-appropriate modifier (e.g. Cmd on macOS,
+/// Ctrl elsewhere) must choose the value themselves -- see `cfg!(target_os)`.
+pub async fn press_key_with_modifiers(
+    client: &CdpClient,
+    session_id: &str,
+    key: &str,
+    modifiers: Option<i32>,
+) -> Result<(), String> {
     let (key_name, code, key_code) = named_key_info(key);
 
     client
@@ -219,7 +235,7 @@ pub async fn press_key(client: &CdpClient, session_id: &str, key: &str) -> Resul
                 unmodified_text: None,
                 windows_virtual_key_code: Some(key_code),
                 native_virtual_key_code: Some(key_code),
-                modifiers: None,
+                modifiers,
             },
             Some(session_id),
         )
@@ -236,7 +252,7 @@ pub async fn press_key(client: &CdpClient, session_id: &str, key: &str) -> Resul
                 unmodified_text: None,
                 windows_virtual_key_code: Some(key_code),
                 native_virtual_key_code: Some(key_code),
-                modifiers: None,
+                modifiers,
             },
             Some(session_id),
         )