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/RECOVERY.md

@@ -21,8 +21,8 @@ project-root/
 │   └── CLI-REFERENCE.md
 ├── src/
 │   ├── core/                # shared logic — both CLI + GUI call into this
-│   ├── cli.py               # Deduplicator CLI
-│   ├── cli_text_clean.py    # Text Cleaner CLI
+│   ├── cli.py               # Find Duplicates CLI
+│   ├── cli_text_clean.py    # Clean Text CLI
 │   ├── cli_analyze.py       # Analyzer CLI
 │   └── gui/
 │       ├── app.py           # Streamlit entry