No-AI skill tracer: SKILL.md, theme presets, sample data, Seam 1 page check

- rpa-dashboard-no-ai/SKILL.md: trigger description and the workflow in spec
  order (scan, report/keep-or-restyle, colours, stack, sections, build, wire,
  verify).
- templates/themes.md: Tebra Sky and Superbill Ember, light and dark blocks.
- templates/palette.py: derives a custom palette from one brand hex and
  checks text contrast in light and dark.
- dashboard.html: built-in sample data so a page with no bot works on first
  open; cleared batches in the donut; component tokens so Ember is a
  token-only swap; accessible names for KPI cards, nav, steps, log, search
  and the dark toggle.
- bridge.py: placeholders inside string literals, so it passes the lint hook
  unfilled.
- tests/page_check: Seam 1 harness (fake Qt bridge, light/dark/narrow).
- tests/evals: Seam 2 runner and fixture a-empty.

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

tests/test_palette.py

@@ -0,0 +1,45 @@
+"""Custom palette: one brand hex in, light + dark accent tokens out, readable in both modes."""
+import importlib.util
+import subprocess
+import sys
+from pathlib import Path
+
+PALETTE = Path(__file__).resolve().parents[1] / "rpa-dashboard-no-ai" / "templates" / "palette.py"
+spec = importlib.util.spec_from_file_location("palette", PALETTE)
+palette = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(palette)
+
+# Fixed Tebra Sky base colours the derived accents sit on (from dashboard.html).
+LIGHT_BG, DARK_BG = "#eaf6fb", "#182a38"
+LIGHT_INK, DARK_INK = "#1c2b33", "#e6eef4"
+LOG_ERROR = "#f68c82"  # dimmest log text colour
+
+
+def contrast(a, b):
+    def lum(h):
+        c = [int(h[i:i + 2], 16) / 255 for i in (1, 3, 5)]
+        c = [x / 12.92 if x <= 0.03928 else ((x + 0.055) / 1.055) ** 2.4 for x in c]
+        return 0.2126 * c[0] + 0.7152 * c[1] + 0.0722 * c[2]
+    hi, lo = sorted([lum(a), lum(b)], reverse=True)
+    return (hi + 0.05) / (lo + 0.05)
+
+
+def test_derived_palette_is_readable_in_light_and_dark():
+    for brand in ["#3d9bd0", "#ffd400", "#0b1f4d", "#7a3cff", "#e4002b", "#00a651", "#ffffff", "#000000"]:
+        t = palette.derive(brand)
+        for mode, bg, ink in [("light", LIGHT_BG, LIGHT_INK), ("dark", DARK_BG, DARK_INK)]:
+            m = t[mode]
+            assert contrast("#ffffff", m["--accent"]) >= 3, (brand, mode, "button text")
+            assert contrast("#ffffff", m["--accent-2"]) >= 3, (brand, mode, "button text, light end")
+            assert contrast(m["--accent"], bg) >= 3, (brand, mode, "accent text")
+            assert contrast(ink, m["--accent-soft"]) >= 4.5, (brand, mode, "secondary button text")
+            assert contrast(LOG_ERROR, m["--accent-dark"]) >= 4.5, (brand, mode, "log text")
+
+
+def test_brand_kept_when_it_already_passes():
+    assert palette.derive("#1f6fb2")["light"]["--accent"] == "#1f6fb2"
+
+
+def test_cli_prints_both_token_blocks_and_contrast_table():
+    out = subprocess.run([sys.executable, str(PALETTE), "#7a3cff"], capture_output=True, text=True, check=True).stdout
+    assert "body{" in out and "body.dark{" in out and "PASS" in out and "FAIL" not in out