docs+code: rename tool labels everywhere

Sweep follow-up to 93e43fc. Display labels now consistent across docs,
landing pages, CLI output, code comments, docstrings, and test prose.
Five parallel surfaces touched:

- docs (EN + ES): README, USER-GUIDE, CLI-REFERENCE, and 11 internal
  design/planning docs
- landing pages: index + bookkeeper/revops/shopify-pet
- src: CLI module docstrings, _TOOL_DISPLAY dicts in cli_analyze.py
  and gui/components/_legacy.py, core module headers, every tool
  page's module docstring
- tests: class/method/module docstrings and section-header comments
- test-cases READMEs

Page slugs (1_Deduplicator etc.), tool_id strings (01_deduplicator
etc.), Python class names (TestDeduplicatorWorkflow, FeatureFlag.*),
URL paths, anchor IDs, CSS classes, and asset filenames were left
intact since they're code identifiers / structural references.

All 2033 tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/NEXT-STEPS.md

@@ -30,7 +30,7 @@ Status legend:
 | ✓ | Item | Where it lives |
 |---|------|----------------|
 | 🟢 | 6 of 9 tools shipped (Dedup, Text, Format, Missing, Column-Map, Pipeline) | `src/core/`, `src/cli_*.py`, `src/gui/pages/` |
-| 🟢 | Pipeline Runner (the retention multiplier per `PLAN.md` §2.6) | `src/core/pipeline.py`, `src/cli_pipeline.py`, `src/gui/pages/9_Pipeline_Runner.py` |
+| 🟢 | Automated Workflows (the retention multiplier per `PLAN.md` §2.6) | `src/core/pipeline.py`, `src/cli_pipeline.py`, `src/gui/pages/9_Pipeline_Runner.py` |
 | 🟢 | 1,729 passing tests · 0 skipped · 0 xfailed | `tests/` |
 | 🟢 | 3 niche demo datasets + pre-tuned pipeline JSONs | `samples/demo/` |
 | 🟢 | Streamlit demo app + Cloud entry shim | `streamlit_app.py`, `src/gui/app_demo.py` |