No-AI desktop path: PyQt bot wired to the page

- templates/bot_runner.py (new, no Qt): runs the bot as a child process
  (unbuffered, UTF-8), tails its output, keeps raw lines in bot_raw.log,
  and turns lines into step/log/status events. Step markers and friendly
  rules use specific substrings, first match wins; unmatched error lines
  are always shown, other unmatched lines hidden. Dry run:
  python dashboard/bot_runner.py prints the events the page would get.
- bridge.py: delegates to bot_runner, one run at a time, restores the
  saved dark mode on every page load (fixes sample-data mode in PyQt),
  adds load_latest_report / download_report slots the page calls.
- SKILL.md: skip the stack question for a PyQt project; desktop wiring
  steps from the bot's real output; verify steps for the host.
- tests: assert-based self-check for the line logic and run loop; Seam 1
  run replay (status dot, Run button, steps, log) and wired-page mode;
  fixture b-pyqt-bot and its Seam 2 eval (all 14 checks pass).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/page_check/test_contract.py

@@ -1,6 +1,7 @@
 """No-AI contract cases: events in, visible result out (see templates/contract.md)."""
 import re
 
+import pytest
 from playwright.sync_api import expect
 
 
@@ -146,6 +147,7 @@ def expect_sample_dashboard(page):
     kpi(page, "Total batches", n)
 
 
+@pytest.mark.usefixtures("sample_data")
 def test_no_bot_page_runs_on_sample_data(page):
     """No bot yet: the page answers its own data actions, so it works on day one."""
     expect_sample_dashboard(page)
@@ -162,6 +164,7 @@ def test_no_bot_page_runs_on_sample_data(page):
     expect(run).to_be_enabled()
 
 
+@pytest.mark.usefixtures("sample_data")
 def test_plain_browser_first_open_shows_sample_data(browser, page_url):
     pg = browser.new_page()
     pg.goto(page_url)