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/BUSINESS.md

@@ -47,7 +47,7 @@ Sell niche Python automation tools as one-time downloadable digital products. Ta
 
 **Surface**: desktop install per OS (PyInstaller) with Streamlit GUI + CLI. Constrained demo on Streamlit Community Cloud.
 
-## 4a. Lead bundle — Deduplicator
+## 4a. Lead bundle — Find Duplicates
 
 Highest pain density across all 4 personas. Feeds landing copy, demo design, feature priority. Tech spec: TECHNICAL.md §11.1.
 
@@ -208,7 +208,7 @@ Headroom enables optional ad spend ($100-200/mo) once a bundle has proven conver
 
 ## 13. Honest status (2026-05-01)
 
-- 3 of 9 tools shipped (Dedup, Text Cleaner, Format Standardizer).
+- 3 of 9 tools shipped (Find Duplicates, Clean Text, Standardize Formats).
 - Cross-platform build pipeline designed, not yet built.
 - macOS code signing not yet set up.
 - Streamlit GUI shipped for the 3 ready tools.