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

skills/agent-browser/SKILL.md

@@ -136,6 +136,9 @@ agent-browser wait @e1                # Wait for element
 agent-browser wait --load networkidle # Wait for network idle
 agent-browser wait --url "**/page"    # Wait for URL pattern
 agent-browser wait 2000               # Wait milliseconds
+agent-browser wait --text "Welcome"    # Wait for text to appear (substring match)
+agent-browser wait --fn "!document.body.innerText.includes('Loading...')"  # Wait for text to disappear
+agent-browser wait "#spinner" --state hidden  # Wait for element to disappear
 
 # Downloads
 agent-browser download @e1 ./file.pdf          # Click element to trigger download
@@ -151,8 +154,16 @@ agent-browser set device "iPhone 14"          # Emulate device (viewport + user
 agent-browser screenshot              # Screenshot to temp dir
 agent-browser screenshot --full       # Full page screenshot
 agent-browser screenshot --annotate   # Annotated screenshot with numbered element labels
+agent-browser screenshot --screenshot-dir ./shots  # Save to custom directory
+agent-browser screenshot --screenshot-format jpeg --screenshot-quality 80
 agent-browser pdf output.pdf          # Save as PDF
 
+# Clipboard
+agent-browser clipboard read                      # Read text from clipboard
+agent-browser clipboard write "Hello, World!"     # Write text to clipboard
+agent-browser clipboard copy                      # Copy current selection
+agent-browser clipboard paste                     # Paste from clipboard
+
 # Diff (compare page states)
 agent-browser diff snapshot                          # Compare current vs last snapshot
 agent-browser diff snapshot --baseline before.txt    # Compare current vs saved file