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>

tests/gui/test_activation.py

@@ -3,7 +3,7 @@
 These exercise the chrome-level gate that ``hide_streamlit_chrome``
 installs: when no valid license is on disk, every page renders the
 activation form instead of the page body, and tool widgets do NOT
-appear. We test against the Deduplicator page since it's the smallest
+appear. We test against the Find Duplicates page since it's the smallest
 real-world tool that depends on chrome.
 
 The autouse fixture in ``tests/conftest.py`` sets

tests/gui/test_advanced_panels.py

@@ -5,7 +5,7 @@ expander that houses every per-column / per-strategy knob. It's the
 densest single widget surface in the GUI, so a session-state key drift
 in there cascades into every dedup session.
 
-We exercise it via the Deduplicator page (rendering ``config_panel``
+We exercise it via the Find Duplicates page (rendering ``config_panel``
 in isolation requires a fake Streamlit context). The page provides
 the surrounding state; we poke widgets and verify their effects.
 """

tests/gui/test_dedup_review.py

@@ -2,7 +2,7 @@
 
 ``match_group_card`` from ``src.gui.components`` has two modes (decided
 / undecided) and a Confirm/Undo flow keyed by session_state. We test
-each state by exercising the parent Deduplicator page end to end and
+each state by exercising the parent Find Duplicates page end to end and
 then poking at ``review_decisions`` directly.
 
 Why not unit-test ``match_group_card`` in isolation? AppTest needs a

tests/gui/test_errors.py

@@ -21,7 +21,7 @@ from .conftest import collected_text, stash_upload
 # ---------------------------------------------------------------------------
 
 class TestMalformedUploadErrors:
-    """Bytes that look like a CSV but aren't parseable. The Deduplicator
+    """Bytes that look like a CSV but aren't parseable. The Find Duplicates
     page wraps ``read_file`` failures in an ``st.error`` with the file
     name and the structured ``format_for_user`` output."""
 

tests/gui/test_gate.py

@@ -11,7 +11,7 @@ exist, each pinned here:
 3. **Upload + matching passed normalization** — gate is a no-op; the
    page proceeds.
 
-We exercise the gate via the Deduplicator page (any tool page would
+We exercise the gate via the Find Duplicates page (any tool page would
 work; dedup is the smallest one that doesn't depend on heavy widgets).
 """
 
@@ -27,7 +27,7 @@ from .conftest import (
 )
 
 
-# Deduplicator is our canary — it calls ``require_normalization_gate``
+# Find Duplicates is our canary — it calls ``require_normalization_gate``
 # on the second line of the module. If the gate blocks, the dedup-
 # specific title shouldn't even render.
 GATED_PAGE = "1_Deduplicator"

tests/gui/test_lite_tier.py

@@ -1,9 +1,9 @@
 """GUI tests for the Lite tier.
 
-A Lite license unlocks Deduplicator, Text Cleaner, Format
-Standardizer. Opening any other tool page (Missing Values, Column
-Mapper, Pipeline Runner, etc.) must render an upgrade prompt and
-short-circuit the page body.
+A Lite license unlocks Find Duplicates, Clean Text, Standardize
+Formats. Opening any other tool page (Fix Missing Values, Map
+Columns, Automated Workflows, etc.) must render an upgrade prompt
+and short-circuit the page body.
 
 The home grid shows a 🔒 Locked badge on the cards for tools the
 user's tier doesn't unlock.
@@ -104,7 +104,7 @@ class TestLiteHomeGridBadges:
     ):
         home_app.run()
         text = collected_text(home_app)
-        # Missing Value Handler is locked under Lite — its card should
+        # Fix Missing Values is locked under Lite — its card should
         # have a 🔒 Locked badge.
         # We assert the lock glyph appears alongside the locked tool's
         # display name. Streamlit renders the markdown verbatim so the

tests/gui/test_workflows.py

@@ -19,7 +19,7 @@ from .conftest import collected_text, stash_upload
 
 
 # ---------------------------------------------------------------------------
-# Deduplicator
+# Find Duplicates
 # ---------------------------------------------------------------------------
 
 class TestDeduplicatorWorkflow:
@@ -64,7 +64,7 @@ class TestDeduplicatorWorkflow:
 
 
 # ---------------------------------------------------------------------------
-# Text Cleaner
+# Clean Text
 # ---------------------------------------------------------------------------
 
 class TestTextCleanerWorkflow:
@@ -96,7 +96,7 @@ class TestTextCleanerWorkflow:
 
 
 # ---------------------------------------------------------------------------
-# Format Standardizer
+# Standardize Formats
 # ---------------------------------------------------------------------------
 
 class TestFormatStandardizerWorkflow:
@@ -110,7 +110,7 @@ class TestFormatStandardizerWorkflow:
 
 
 # ---------------------------------------------------------------------------
-# Missing Value Handler
+# Fix Missing Values
 # ---------------------------------------------------------------------------
 
 class TestMissingValuesWorkflow:
@@ -124,7 +124,7 @@ class TestMissingValuesWorkflow:
 
 
 # ---------------------------------------------------------------------------
-# Column Mapper
+# Map Columns
 # ---------------------------------------------------------------------------
 
 class TestColumnMapperWorkflow:
@@ -138,7 +138,7 @@ class TestColumnMapperWorkflow:
 
 
 # ---------------------------------------------------------------------------
-# Pipeline Runner
+# Automated Workflows
 # ---------------------------------------------------------------------------
 
 class TestPipelineRunnerWorkflow: