feat(gui): sidebar sections + non-technical tool labels

Sidebar nav now groups tools under Data Review / Data Cleaners /
Transformations / Automations via st.navigation, replacing the flat
auto-discovered list. Tool display names switch to action-first
phrasing (Find Duplicates, Fix Missing Values, Find Unusual Values,
Standardize Formats, Clean Text, Quality Check, Map Columns, Combine
Files, Automated Workflows) in EN + ES packs and on each page's H1.

The Data Cleaners section follows the requested order: Missing
Values → Outliers → Text Cleaner → Format Standardizer → Deduplicator
→ Quality Check. (Text Cleaner kept inside cleaners since the request
didn't list it but the tool still ships.) Registry now carries a
section field; helpers added: tools_in_section(), section_label().

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

src/gui/app.py

@@ -2,6 +2,14 @@
 
 Launch:
     streamlit run src/gui/app.py
+
+This module is the navigation manager for the full GUI: it registers
+every tool page with ``st.navigation`` so the sidebar can render
+section headers ("Data Review", "Data Cleaners", "Transformations",
+"Automations") instead of the flat numbered list Streamlit's
+auto-page-discovery would produce. The Home page itself is registered
+as a callable defined below so the entry script remains the single
+file users invoke.
 """
 
 from __future__ import annotations
@@ -18,70 +26,70 @@ if str(_project_root) not in sys.path:
 
 
 # ---------------------------------------------------------------------------
-# Page config
+# Home page (rendered when the user selects the default nav entry)
 # ---------------------------------------------------------------------------
 
+def _home_page() -> None:
+    """Render the home page — upload section + tool grid + footer."""
     from src.gui.components import (
         findings_count_for_tool,
         hide_streamlit_chrome,
         upload_and_analyze_section,
     )
+    from src.gui.tools_registry import (
+        TOOLS,
+        section_label,
+        tool_description,
+        tool_name,
+    )
     from src.i18n import t
+    from src.license import get_manager
 
     st.set_page_config(
         page_title=t("home.page_title"),
         page_icon="🧹",
         layout="wide",
     )
-
-# ``hide_streamlit_chrome`` also renders the sidebar language selector,
-# so every page that hides chrome picks up the same picker.
     hide_streamlit_chrome()
 
-
-# ---------------------------------------------------------------------------
-# Home page
-# ---------------------------------------------------------------------------
-
     st.title(t("home.title"))
     st.caption(t("home.caption"))
 
     st.divider()
 
-# ---------------------------------------------------------------------------
-# Upload & analyze (optional onboarding step)
-# ---------------------------------------------------------------------------
-
     upload_and_analyze_section()
 
     st.divider()
 
-# ---------------------------------------------------------------------------
-# Tool cards
-# ---------------------------------------------------------------------------
-
-from src.gui.tools_registry import TOOLS, tool_description, tool_name
-from src.license import get_manager
-
     # Per-tier feature set for badging — Ready tools that the user's
     # tier doesn't unlock get a red "🔒 Locked" pill instead of the green
     # "Ready" so they see at a glance which tools an upgrade would
     # unlock. Dev-mode skips the lock check so the home grid renders the
     # full SKU during development.
     _license_state = get_manager().current_state()
-_unlocked_features = set(_license_state.features) if _license_state.valid else set()
+    _unlocked_features = (
+        set(_license_state.features) if _license_state.valid else set()
+    )
     _dev_mode = get_manager().dev_mode
 
-# Render tool cards in a 3-column grid. Cards picked up by the analyzer get a
+    # Group tool cards by sidebar section so the home grid mirrors the
-# coloured "N findings" badge so the user can see at a glance which tools
+    # left-nav layout — same vocabulary, same ordering.
-# would help with the just-uploaded file.
+    sections: list[tuple[str, list]] = []
-for row_start in range(0, len(TOOLS), 3):
+    for section in ("review", "cleaners", "transformations", "automations"):
+        tools = [tool for tool in TOOLS if tool.section == section]
+        if not tools:
+            continue
+        sections.append((section_label(section), tools))
+
+    for header, tools in sections:
+        st.subheader(header)
+        for row_start in range(0, len(tools), 3):
             cols = st.columns(3)
             for i, col in enumerate(cols):
                 idx = row_start + i
-        if idx >= len(TOOLS):
+                if idx >= len(tools):
                     break
-        tool = TOOLS[idx]
+                tool = tools[idx]
                 with col:
                     tool_locked = (
                         tool.status == "Ready"
@@ -101,7 +109,11 @@ for row_start in range(0, len(TOOLS), 3):
                     badge = ""
                     n = findings_count_for_tool(tool.tool_id)
                     if n:
-                badge_key = "home.findings_badge_one" if n == 1 else "home.findings_badge_other"
+                        badge_key = (
+                            "home.findings_badge_one"
+                            if n == 1
+                            else "home.findings_badge_other"
+                        )
                         badge = f" :red-background[**{t(badge_key, n=n)}**]"
                     lock_glyph = "🔒 " if tool_locked else ""
                     st.markdown(
@@ -110,10 +122,90 @@ for row_start in range(0, len(TOOLS), 3):
                         f":{status_color}[**{lock_glyph}{t(status_key)}**]"
                     )
 
-
-# ---------------------------------------------------------------------------
-# Footer
-# ---------------------------------------------------------------------------
-
     st.divider()
     st.caption(t("chrome.footer"))
+
+
+# ---------------------------------------------------------------------------
+# Navigation registration
+# ---------------------------------------------------------------------------
+#
+# ``st.navigation`` overrides Streamlit's auto-discovery of the
+# ``pages/`` directory, so every page we want in the sidebar must be
+# listed here. The dict key becomes the section header rendered above
+# the entries; an empty-string key suppresses the header so the Home
+# entry sits at the top without a label above it.
+
+from src.gui.tools_registry import TOOLS, section_label  # noqa: E402
+from src.i18n import t as _t  # noqa: E402
+
+
+def _page_for(tool_id: str, *, page_slug: str, icon: str, title: str) -> "st.Page":
+    return st.Page(
+        f"pages/{page_slug}.py",
+        title=title,
+        icon=icon,
+        url_path=tool_id,
+    )
+
+
+def _build_navigation() -> dict[str, list]:
+    by_section: dict[str, list] = {
+        "review": [],
+        "cleaners": [],
+        "transformations": [],
+        "automations": [],
+    }
+    for tool in TOOLS:
+        by_section[tool.section].append(
+            _page_for(
+                tool.tool_id,
+                page_slug=tool.page_slug,
+                icon=tool.icon,
+                title=tool.name,
+            )
+        )
+
+    # The Review gate has no entry in the registry (it isn't a "tool")
+    # so register it by hand at the top of its section.
+    review_page = st.Page(
+        "pages/0_Review.py",
+        title=_t("nav.review_page_title") or "Review",
+        icon="🛡️",
+        url_path="review",
+    )
+    by_section["review"].insert(0, review_page)
+
+    home = st.Page(
+        _home_page,
+        title=_t("nav.home_page_title") or "Home",
+        icon="🧹",
+        default=True,
+        url_path="home",
+    )
+    activate = st.Page(
+        "pages/_Activate.py",
+        title=_t("nav.activate_title") or "Activate",
+        icon="🔑",
+        url_path="activate",
+    )
+    close = st.Page(
+        "pages/99_Close.py",
+        title=_t("nav.close_title") or "Close",
+        icon="🛑",
+        url_path="close",
+    )
+
+    account_header = _t("nav.section_account") or "Account"
+    return {
+        "": [home],
+        section_label("review"): by_section["review"],
+        section_label("cleaners"): by_section["cleaners"],
+        section_label("transformations"): by_section["transformations"],
+        section_label("automations"): by_section["automations"],
+        account_header: [activate, close],
+    }
+
+
+pg = st.navigation(_build_navigation())
+pg.run()

src/gui/pages/1_Deduplicator.py

@@ -54,7 +54,7 @@ for key, default in _DEFAULTS.items():
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("🔍 Deduplicator")
+st.title("🔍 Find Duplicates")
 st.caption("Find and remove duplicate rows in CSV, delimited text, and Excel files.")
 
 
@@ -363,5 +363,5 @@ else:
 st.divider()
 st.caption(
     "Runs locally. Your data never leaves this computer. "
-    "| DataTools Deduplicator v3.0"
+    "| DataTools v3.0"
 )

src/gui/pages/2_Text_Cleaner.py

@@ -39,7 +39,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("✂️ Text Cleaner")
+st.title("✂️ Clean Text")
 st.caption(
     "Trim whitespace, fold smart quotes, strip invisible characters, and "
     "normalize line endings. Runs locally — your data never leaves this computer."

src/gui/pages/3_Format_Standardizer.py

@@ -37,7 +37,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("📐 Format Standardizer")
+st.title("📐 Standardize Formats")
 st.caption(
     "Canonicalize dates, phone numbers, currency, names, addresses, and "
     "booleans on a per-column basis. Runs locally — your data never leaves "

src/gui/pages/4_Missing_Values.py

@@ -38,7 +38,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("🕳️ Missing Value Handler")
+st.title("🕳️ Fix Missing Values")
 st.caption(
     "Detect disguised nulls, profile missingness, and apply imputation or "
     "drop strategies. Runs locally — your data never leaves this computer."

src/gui/pages/5_Column_Mapper.py

@@ -39,7 +39,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("🗂️ Column Mapper")
+st.title("🗂️ Map Columns")
 st.caption(
     "Rename columns, enforce a target schema, and coerce types. Runs locally — "
     "your data never leaves this computer."

src/gui/pages/6_Outlier_Detector.py

@@ -26,7 +26,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("📊 Outlier Detector")
+st.title("📊 Find Unusual Values")
 st.caption("Detect and handle outliers in numeric columns.")
 
 st.info("This tool is under development.")

src/gui/pages/7_Multi_File_Merger.py

@@ -26,7 +26,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("📎 Multi-File Merger")
+st.title("📎 Combine Files")
 st.caption("Combine multiple CSV and Excel files into one dataset.")
 
 st.info("This tool is under development.")

src/gui/pages/8_Validator_Reporter.py

@@ -26,7 +26,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("✅ Validator & Reporter")
+st.title("✅ Quality Check")
 st.caption("Validate data against rules and generate quality reports.")
 
 st.info("This tool is under development.")

src/gui/pages/9_Pipeline_Runner.py

@@ -40,7 +40,7 @@ require_normalization_gate()
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("⚙️ Pipeline Runner")
+st.title("⚙️ Automated Workflows")
 st.caption(
     "Chain DataTools cleaning steps into one repeatable workflow. The "
     "pipeline recommends an order; you stay in control."

src/gui/tools_registry.py

@@ -1,9 +1,9 @@
 """Per-tool manifest registry.
 
-Single source of truth for what tools exist, their display strings, and
+Single source of truth for what tools exist, their display strings, the
-the tier (which controls whether a tool ships in a given build SKU). The
+left-nav section they belong to, and the tier (which controls whether a
-home-page sidebar consumes this list; future per-tool packaging will
+tool ships in a given build SKU). The home-page sidebar consumes this
-filter it via the ``tier`` field.
+list; future per-tool packaging will filter it via the ``tier`` field.
 
 Adding a tool: append one ``Tool`` entry. Page filenames must match the
 ``page_slug`` so Streamlit's automatic page discovery picks them up.
@@ -22,6 +22,10 @@ from typing import Literal
 
 Tier = Literal["core", "pro", "enterprise"]
 Status = Literal["Ready", "Coming Soon"]
+# Sidebar grouping. The Review gate is its own section; cleaners,
+# transformations, and automations group the tools by what the user is
+# trying to accomplish rather than by implementation detail.
+Section = Literal["review", "cleaners", "transformations", "automations"]
 
 
 @dataclass(frozen=True)
@@ -34,102 +38,127 @@ class Tool:
     description: str       # One-sentence card body.
     page_slug: str         # Streamlit page filename without ".py" (e.g. "1_Deduplicator").
     status: Status         # "Ready" or "Coming Soon" — drives the card badge color.
+    section: Section       # Sidebar group this tool belongs to.
     tier: Tier = "core"    # Build-time gating hook; every tool is "core" today.
 
 
+# Order in this list IS the order shown in each sidebar section, so
+# arranging it carefully matters: within "cleaners" we lead with the
+# operations a non-technical user is most likely to need (filling
+# blanks, flagging outliers) before progressing to format cleanup,
+# dedup, and the final quality report.
 TOOLS: list[Tool] = [
-    Tool(
-        tool_id="01_deduplicator",
-        icon="🔍",
-        name="Deduplicator",
-        description=(
-            "Fuzzy matching, normalization, survivor selection, and "
-            "interactive review."
-        ),
-        page_slug="1_Deduplicator",
-        status="Ready",
-    ),
-    Tool(
-        tool_id="02_text_cleaner",
-        icon="✂️",
-        name="Text Cleaner",
-        description=(
-            "Whitespace trim, multi-space collapse, Unicode normalization, "
-            "BOM and line-ending handling."
-        ),
-        page_slug="2_Text_Cleaner",
-        status="Ready",
-    ),
-    Tool(
-        tool_id="03_format_standardizer",
-        icon="📐",
-        name="Format Standardizer",
-        description=(
-            "Standardize dates, currencies, names, phone numbers, and addresses."
-        ),
-        page_slug="3_Format_Standardizer",
-        status="Ready",
-    ),
     Tool(
         tool_id="04_missing_handler",
         icon="🕳️",
-        name="Missing Value Handler",
+        name="Fix Missing Values",
         description=(
             "Detect disguised nulls, missingness analysis, and imputation strategies."
         ),
         page_slug="4_Missing_Values",
         status="Ready",
-    ),
+        section="cleaners",
-    Tool(
-        tool_id="05_column_mapper",
-        icon="🗂️",
-        name="Column Mapper",
-        description="Rename columns, enforce a target schema, and coerce types.",
-        page_slug="5_Column_Mapper",
-        status="Ready",
     ),
     Tool(
         tool_id="06_outlier_detector",
         icon="📊",
-        name="Outlier Detector",
+        name="Find Unusual Values",
         description=(
             "Z-score, IQR, and MAD detection with domain-rule violations and "
             "winsorization."
         ),
         page_slug="6_Outlier_Detector",
         status="Coming Soon",
+        section="cleaners",
     ),
     Tool(
-        tool_id="07_multi_file_merger",
+        tool_id="02_text_cleaner",
-        icon="📎",
+        icon="✂️",
-        name="Multi-File Merger",
+        name="Clean Text",
-        description="Combine multiple CSV/Excel files with schema alignment.",
+        description=(
-        page_slug="7_Multi_File_Merger",
+            "Whitespace trim, multi-space collapse, Unicode normalization, "
-        status="Coming Soon",
+            "BOM and line-ending handling."
+        ),
+        page_slug="2_Text_Cleaner",
+        status="Ready",
+        section="cleaners",
+    ),
+    Tool(
+        tool_id="03_format_standardizer",
+        icon="📐",
+        name="Standardize Formats",
+        description=(
+            "Standardize dates, currencies, names, phone numbers, and addresses."
+        ),
+        page_slug="3_Format_Standardizer",
+        status="Ready",
+        section="cleaners",
+    ),
+    Tool(
+        tool_id="01_deduplicator",
+        icon="🔍",
+        name="Find Duplicates",
+        description=(
+            "Fuzzy matching, normalization, survivor selection, and "
+            "interactive review."
+        ),
+        page_slug="1_Deduplicator",
+        status="Ready",
+        section="cleaners",
     ),
     Tool(
         tool_id="08_validator_reporter",
         icon="✅",
-        name="Validator & Reporter",
+        name="Quality Check",
         description=(
             "Validate against rules and generate PDF/Excel quality reports."
         ),
         page_slug="8_Validator_Reporter",
         status="Coming Soon",
+        section="cleaners",
+    ),
+    Tool(
+        tool_id="05_column_mapper",
+        icon="🗂️",
+        name="Map Columns",
+        description="Rename columns, enforce a target schema, and coerce types.",
+        page_slug="5_Column_Mapper",
+        status="Ready",
+        section="transformations",
+    ),
+    Tool(
+        tool_id="07_multi_file_merger",
+        icon="📎",
+        name="Combine Files",
+        description="Combine multiple CSV/Excel files with schema alignment.",
+        page_slug="7_Multi_File_Merger",
+        status="Coming Soon",
+        section="transformations",
     ),
     Tool(
         tool_id="09_pipeline_runner",
         icon="⚙️",
-        name="Pipeline Runner",
+        name="Automated Workflows",
         description=(
             "Chain tools in recommended order and pass output between steps."
         ),
         page_slug="9_Pipeline_Runner",
         status="Ready",
+        section="automations",
     ),
 ]
 
 
+# Display labels for each sidebar section. Kept here so i18n falls back
+# to a sensible English string if a translation pack is missing the key.
+SECTION_LABELS: dict[Section, str] = {
+    "review": "Data Review",
+    "cleaners": "Data Cleaners",
+    "transformations": "Transformations",
+    "automations": "Automations",
+}
+
+
 def tools_for_tier(*tiers: Tier) -> list[Tool]:
     """Subset filter for build-time slicing.
 
@@ -142,6 +171,11 @@ def tools_for_tier(*tiers: Tier) -> list[Tool]:
     return [t for t in TOOLS if t.tier in keep]
 
 
+def tools_in_section(section: Section) -> list[Tool]:
+    """Return the tools in *section*, preserving registry order."""
+    return [t for t in TOOLS if t.section == section]
+
+
 def tool_by_id(tool_id: str) -> Tool | None:
     return next((t for t in TOOLS if t.tool_id == tool_id), None)
 
@@ -167,3 +201,12 @@ def tool_description(tool_id: str) -> str:
     fallback = tool.description if tool else ""
     translated = _t(f"tools.{tool_id}.description")
     return translated if translated != f"tools.{tool_id}.description" else fallback
+
+
+def section_label(section: Section) -> str:
+    """Return the localized sidebar section header."""
+    from src.i18n import t as _t
+    fallback = SECTION_LABELS[section]
+    key = f"nav.section_{section}"
+    translated = _t(key)
+    return translated if translated != key else fallback

src/i18n/packs/en.json

@@ -99,40 +99,51 @@
   },
   "tools": {
     "01_deduplicator": {
-      "name": "Deduplicator",
+      "name": "Find Duplicates",
       "description": "Fuzzy matching, normalization, survivor selection, and interactive review."
     },
     "02_text_cleaner": {
-      "name": "Text Cleaner",
+      "name": "Clean Text",
       "description": "Whitespace trim, multi-space collapse, Unicode normalization, BOM and line-ending handling."
     },
     "03_format_standardizer": {
-      "name": "Format Standardizer",
+      "name": "Standardize Formats",
       "description": "Standardize dates, currencies, names, phone numbers, and addresses."
     },
     "04_missing_handler": {
-      "name": "Missing Value Handler",
+      "name": "Fix Missing Values",
       "description": "Detect disguised nulls, missingness analysis, and imputation strategies."
     },
     "05_column_mapper": {
-      "name": "Column Mapper",
+      "name": "Map Columns",
       "description": "Rename columns, enforce a target schema, and coerce types."
     },
     "06_outlier_detector": {
-      "name": "Outlier Detector",
+      "name": "Find Unusual Values",
       "description": "Z-score, IQR, and MAD detection with domain-rule violations and winsorization."
     },
     "07_multi_file_merger": {
-      "name": "Multi-File Merger",
+      "name": "Combine Files",
       "description": "Combine multiple CSV/Excel files with schema alignment."
     },
     "08_validator_reporter": {
-      "name": "Validator & Reporter",
+      "name": "Quality Check",
       "description": "Validate against rules and generate PDF/Excel quality reports."
     },
     "09_pipeline_runner": {
-      "name": "Pipeline Runner",
+      "name": "Automated Workflows",
       "description": "Chain tools in recommended order and pass output between steps."
     }
+  },
+  "nav": {
+    "section_review": "Data Review",
+    "section_cleaners": "Data Cleaners",
+    "section_transformations": "Transformations",
+    "section_automations": "Automations",
+    "review_page_title": "Review",
+    "home_page_title": "Home",
+    "section_account": "Account",
+    "activate_title": "Activate",
+    "close_title": "Close"
   }
 }

src/i18n/packs/es.json

@@ -99,40 +99,51 @@
   },
   "tools": {
     "01_deduplicator": {
-      "name": "Eliminador de duplicados",
+      "name": "Buscar duplicados",
       "description": "Coincidencia difusa, normalización, selección de superviviente y revisión interactiva."
     },
     "02_text_cleaner": {
-      "name": "Limpiador de texto",
+      "name": "Limpiar texto",
       "description": "Recorte de espacios, colapso de espacios múltiples, normalización Unicode, manejo de BOM y de finales de línea."
     },
     "03_format_standardizer": {
-      "name": "Estandarizador de formatos",
+      "name": "Estandarizar formatos",
       "description": "Estandariza fechas, monedas, nombres, números de teléfono y direcciones."
     },
     "04_missing_handler": {
-      "name": "Gestor de valores faltantes",
+      "name": "Corregir valores faltantes",
       "description": "Detecta nulos disfrazados, analiza la ausencia de datos y aplica estrategias de imputación."
     },
     "05_column_mapper": {
-      "name": "Mapeador de columnas",
+      "name": "Mapear columnas",
       "description": "Renombra columnas, aplica un esquema objetivo y fuerza tipos de datos."
     },
     "06_outlier_detector": {
-      "name": "Detector de valores atípicos",
+      "name": "Detectar valores atípicos",
       "description": "Detección por Z-score, IQR y MAD con reglas de dominio y winsorización."
     },
     "07_multi_file_merger": {
-      "name": "Combinador de varios archivos",
+      "name": "Combinar archivos",
       "description": "Combina varios archivos CSV/Excel alineando sus esquemas."
     },
     "08_validator_reporter": {
-      "name": "Validador e informes",
+      "name": "Verificación de calidad",
       "description": "Valida contra reglas y genera informes de calidad en PDF/Excel."
     },
     "09_pipeline_runner": {
-      "name": "Ejecutor de canalizaciones",
+      "name": "Flujos automatizados",
       "description": "Encadena herramientas en el orden recomendado y pasa la salida entre pasos."
     }
+  },
+  "nav": {
+    "section_review": "Revisión de datos",
+    "section_cleaners": "Limpiadores de datos",
+    "section_transformations": "Transformaciones",
+    "section_automations": "Automatizaciones",
+    "review_page_title": "Revisión",
+    "home_page_title": "Inicio",
+    "section_account": "Cuenta",
+    "activate_title": "Activar",
+    "close_title": "Cerrar"
   }
 }

tests/gui/test_chrome.py

@@ -168,11 +168,11 @@ class TestHomeToolGridLocalization:
     English names. Pin a few representative ones."""
 
     @pytest.mark.parametrize("needle", [
-        "Eliminador de duplicados",
+        "Buscar duplicados",
-        "Limpiador de texto",
+        "Limpiar texto",
-        "Estandarizador de formatos",
+        "Estandarizar formatos",
-        "Gestor de valores faltantes",
+        "Corregir valores faltantes",
-        "Mapeador de columnas",
+        "Mapear columnas",
     ])
     def test_es_tool_name_on_home_grid(self, home_app, needle):
         with_language(home_app, "es")

tests/gui/test_findings_panel.py

@@ -113,13 +113,13 @@ class TestGrouping:
         labels = [e.label for e in app.expander]
         # Two unique tools → two expanders. Each label carries the
         # tool's display name + finding count.
-        text_cleaner_expanders = [lbl for lbl in labels if "Text Cleaner" in lbl]
+        text_cleaner_expanders = [lbl for lbl in labels if "Clean Text" in lbl]
-        format_expanders = [lbl for lbl in labels if "Format Standardizer" in lbl]
+        format_expanders = [lbl for lbl in labels if "Standardize Formats" in lbl]
         assert len(text_cleaner_expanders) == 1, (
-            f"expected one Text Cleaner expander; got: {labels}"
+            f"expected one Clean Text expander; got: {labels}"
         )
         assert len(format_expanders) == 1, (
-            f"expected one Format Standardizer expander; got: {labels}"
+            f"expected one Standardize Formats expander; got: {labels}"
         )
 
     def test_tool_names_localize_in_spanish(self):
@@ -127,7 +127,7 @@ class TestGrouping:
         app = _harness(findings, lang="es")
         app.run()
         labels = [e.label for e in app.expander]
-        assert any("Limpiador de texto" in lbl for lbl in labels), (
+        assert any("Limpiar texto" in lbl for lbl in labels), (
             f"Spanish tool name missing; expanders: {labels}"
         )
 
@@ -140,7 +140,7 @@ class TestGrouping:
         app.run()
         labels = [e.label for e in app.expander]
         # Pack template: "{tool} — {n} finding(s)"
-        text_cleaner_label = next(l for l in labels if "Text Cleaner" in l)
+        text_cleaner_label = next(l for l in labels if "Clean Text" in l)
         assert "3" in text_cleaner_label, (
             f"expected count '3' in expander label; got {text_cleaner_label!r}"
         )
@@ -163,7 +163,7 @@ class TestOpenToolButton:
         # raw markdown. We probe both.
         text = collected_text(app)
         # Pack template: "Open {tool} →"
-        assert "Open Text Cleaner" in text
+        assert "Open Clean Text" in text
 
     def test_open_tool_label_spanish(self):
         findings = [_make_finding(tool="02_text_cleaner")]
@@ -171,7 +171,7 @@ class TestOpenToolButton:
         app.run()
         text = collected_text(app)
         # Pack template: "Abrir {tool} →"
-        assert "Abrir Limpiador de texto" in text
+        assert "Abrir Limpiar texto" in text
 
 
 # ---------------------------------------------------------------------------

tests/gui/test_gate.py

@@ -45,7 +45,7 @@ class TestGateNoUpload:
         text = collected_text(app)
         # The dedup page title is the unambiguous signal that the gate
         # didn't short-circuit.
-        assert "Deduplicator" in text
+        assert "Find Duplicates" in text
 
     def test_no_upload_no_gate_warning(self, app_factory):
         app = app_factory(GATED_PAGE)

tests/gui/test_lite_tier.py

@@ -40,9 +40,9 @@ def lite_license(monkeypatch, tmp_path):
 
 class TestLiteUnlockedPages:
     @pytest.mark.parametrize("slug,signal", [
-        ("1_Deduplicator", "Deduplicator"),
+        ("1_Deduplicator", "Find Duplicates"),
-        ("2_Text_Cleaner", "Text Cleaner"),
+        ("2_Text_Cleaner", "Clean Text"),
-        ("3_Format_Standardizer", "Format Standardizer"),
+        ("3_Format_Standardizer", "Standardize Formats"),
     ])
     def test_unlocked_pages_render_body(
         self, lite_license, app_factory, slug, signal, small_csv_bytes,

tests/gui/test_smoke.py

@@ -54,15 +54,15 @@ PAGE_SLUGS = [
 # the localized substring — the test surface stays the same.
 EXPECTED_SUBSTRINGS: dict[str, dict[str, str]] = {
     "0_Review":              {"en": "Review",            "es": "Review"},
-    "1_Deduplicator":        {"en": "Deduplicator",   "es": "Deduplicator"},
+    "1_Deduplicator":        {"en": "Find Duplicates",   "es": "Find Duplicates"},
-    "2_Text_Cleaner":        {"en": "Text Cleaner",   "es": "Text Cleaner"},
+    "2_Text_Cleaner":        {"en": "Clean Text",        "es": "Clean Text"},
-    "3_Format_Standardizer": {"en": "Format",         "es": "Format"},
+    "3_Format_Standardizer": {"en": "Standardize",       "es": "Standardize"},
-    "4_Missing_Values":      {"en": "Missing",        "es": "Missing"},
+    "4_Missing_Values":      {"en": "Fix Missing",       "es": "Fix Missing"},
-    "5_Column_Mapper":       {"en": "Column",         "es": "Column"},
+    "5_Column_Mapper":       {"en": "Map Columns",       "es": "Map Columns"},
-    "6_Outlier_Detector":    {"en": "Outlier",        "es": "Outlier"},
+    "6_Outlier_Detector":    {"en": "Unusual",           "es": "Unusual"},
-    "7_Multi_File_Merger":   {"en": "Merger",         "es": "Merger"},
+    "7_Multi_File_Merger":   {"en": "Combine Files",     "es": "Combine Files"},
-    "8_Validator_Reporter":  {"en": "Validator",      "es": "Validator"},
+    "8_Validator_Reporter":  {"en": "Quality Check",     "es": "Quality Check"},
-    "9_Pipeline_Runner":     {"en": "Pipeline",       "es": "Pipeline"},
+    "9_Pipeline_Runner":     {"en": "Automated",         "es": "Automated"},
     "99_Close":              {"en": "Close DataTools",   "es": "Cerrar DataTools"},
 }
 
@@ -95,7 +95,7 @@ class TestHomePageRenders:
         with_language(home_app, "es")
         home_app.run()
         text = collected_text(home_app)
-        assert "Eliminador de duplicados" in text
+        assert "Buscar duplicados" in text
 
 
 class TestEveryPageRenders:

tests/gui/test_workflows.py

@@ -78,7 +78,7 @@ class TestTextCleanerWorkflow:
         app.run()
         assert not app.exception
         text = collected_text(app)
-        assert "Text Cleaner" in text
+        assert "Clean Text" in text
 
     def test_preview_or_clean_button_present(self, app_factory, small_csv_bytes):
         """The text cleaner ships a primary action (label varies by
@@ -106,7 +106,7 @@ class TestFormatStandardizerWorkflow:
         app.run()
         assert not app.exception
         text = collected_text(app)
-        assert "Format Standardizer" in text
+        assert "Standardize Formats" in text
 
 
 # ---------------------------------------------------------------------------
@@ -148,7 +148,7 @@ class TestPipelineRunnerWorkflow:
         app.run()
         assert not app.exception
         text = collected_text(app)
-        assert "Pipeline" in text
+        assert "Automated Workflows" in text
 
 
 # ---------------------------------------------------------------------------
@@ -194,9 +194,9 @@ class TestReviewWorkflow:
 # ---------------------------------------------------------------------------
 
 @pytest.mark.parametrize("slug,name", [
-    ("6_Outlier_Detector", "Outlier"),
+    ("6_Outlier_Detector", "Unusual Values"),
-    ("7_Multi_File_Merger", "Merger"),
+    ("7_Multi_File_Merger", "Combine Files"),
-    ("8_Validator_Reporter", "Validator"),
+    ("8_Validator_Reporter", "Quality Check"),
 ])
 class TestComingSoonStubs:
     def test_stub_renders(self, app_factory, slug, name):