Multi-monitor jumps, screen OCR, and generated sprite art

petctl gains screen verbs: `jump` (1-based number, name, next/prev/
primary/other, or a direction resolved from real geometry), `monitors`,
and `read` for OCR of a monitor's contents.

- monitors.py: pure layout model + jump-target resolution. The monitor
  list is published by PetWindow from QGuiApplication.screens() over a
  queued signal, so the controller and window agree on what "monitor 2"
  means; xrandr and Qt order screens differently on the same machine.
- screen_text.py: pull-only OCR (mss capture + Tesseract/RapidOCR).
  Nothing captures unless the server asks, and the text rides back up
  the tool-result relay so Bolt can read a screen mid-turn. Both deps
  optional, soft-failing with a reason. SCREEN_TEXT=false removes it.
- Query verbs are answered in controller._handle_command rather than
  pet_actions.describe(), because their output is the point.
- scripts/generate_bolt_sprites.py draws every frame; walk/ is a
  side-view cycle stepped by distance travelled, not by the animation
  timer, so the planted paw tracks the window exactly. sprite.py loads
  it via EXTRA_ANIMATIONS keyed by name, with has() so callers can
  decline a placeholder blob.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

requirements.txt

@@ -32,6 +32,18 @@ pynput>=1.7
 # Not imported by the app itself.
 Pillow>=10.0
 
+# Screen reading (`petctl read`) — Bolt OCRs a monitor and uses the text in
+# his reply. Both optional: without them `petctl read` reports what's missing
+# and the rest of the pet is unaffected.
+#   mss         screen capture. X11/Win32/macOS — NOT Wayland.
+#   pytesseract a thin wrapper; the actual engine is a system package:
+#                   sudo apt install tesseract-ocr
+# No-sudo alternative to those two lines: pip install rapidocr-onnxruntime
+# (pure pip, reuses the onnxruntime openwakeword already pulls in, slower to
+# start). screen_text.resolve_engine() picks whichever is present.
+mss>=9.0
+pytesseract>=0.3.10
+
 # Test runner (tests/ — pure logic, no audio hardware or display needed;
 # run with QT_QPA_PLATFORM=offscreen).
 pytest>=8.0