feat(nav,i18n): sticky footer with Back-to-Home + localized tool headers

Two unrelated UX issues addressed in one sweep across all nine tool
pages because they share the same edit surface.

(1) Sticky footer replaces the top + bottom back-link buttons.

Reported: a big white empty footer space at the bottom of every page;
the Back to Home button at the top scrolled out of view on long pages.

New ``render_sticky_footer()`` helper in ``components/_legacy.py``
injects a fixed-position bar at ``bottom: 0`` of the viewport with:

- A border-top so it visually reads as a non-movable bar.
- A semi-transparent background (rgba 0.96 + ``backdrop-filter: blur``)
  so content underneath shows through faintly when the user scrolls.
- A styled ``<a href="home">`` anchor (not an ``st.button``) because
  Streamlit widgets can't be CSS-positioned reliably — Streamlit owns
  the widget's DOM container and re-mounts it on every rerun. A real
  anchor sits exactly where the CSS puts it and triggers Streamlit's
  URL routing to the home page.
- ``padding-bottom: 3.5rem`` on the main container so the last widget
  isn't hidden behind the bar.

Called once per tool page, immediately after ``hide_streamlit_chrome()``
so it renders even on pages that ``st.stop()`` early before any other
content runs. The old top-and-bottom ``back_to_home_link()`` calls are
removed from every tool page; their entry/exit points were dropping
the button when the script short-circuited.

(2) Tool-page headers now localize.

Reported: switching the sidebar language picker to Spanish left the
tool page's title + caption in English. Root cause: every page had
hard-coded ``st.title("✂️ Clean Text")`` / ``st.caption("Trim
whitespace...")`` strings.

Added per-tool ``tools.<id>.page_title`` and
``tools.<id>.page_caption`` keys to ``en.json`` and ``es.json`` for
all nine tools. Routed each page's title/caption call through ``t()``.
Verified: with ``ui_lang=es`` set, the Clean Text page now renders
"✂️ Limpiar texto" + the Spanish caption.

Updated ``tests/gui/test_smoke.py::EXPECTED_SUBSTRINGS`` so the
``es`` column for each tool page asserts the actual Spanish string
(was a duplicate of the English string back when the page bodies
were English-only).

2220 tests pass.

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

src/gui/components/__init__.py

@@ -47,6 +47,7 @@ from .activation import (  # noqa: F401  re-exported
 __all__ = [
     # Shared chrome / pickup
     "back_to_home_link",
+    "render_sticky_footer",
     "hide_streamlit_chrome",
     "html_download_button",
     "local_download_button",

src/gui/components/_legacy.py

@@ -491,6 +491,88 @@ def local_download_button(
 html_download_button = local_download_button
 
 
+def render_sticky_footer() -> None:
+    """Render a slim fixed-position footer at the bottom of the viewport.
+
+    Contains a "Back to Home" link that's always visible regardless of
+    scroll position. Replaces the previous top + bottom-of-page
+    ``back_to_home_link`` buttons: a single sticky bar is more
+    discoverable, doesn't scroll out of view, and visually reads as a
+    "non-movable footer" (border-top + slim padding) rather than
+    just-another-button-at-the-bottom.
+
+    Implementation notes:
+
+    - Uses a styled ``<a href="home">`` anchor rather than an
+      ``st.button`` because Streamlit widgets can't be CSS-positioned
+      reliably (their DOM container is owned by Streamlit's renderer
+      and gets re-mounted on every rerun). A real anchor sits anywhere
+      we want and triggers Streamlit's URL routing to the home page.
+    - ``href="home"`` is a relative path so it works behind a reverse
+      proxy / non-root mount.
+    - We bump ``padding-bottom`` on the main container so the last
+      widget isn't hidden behind the fixed bar.
+    - Theme: ``rgba(255,255,255,0.96)`` background with a thin
+      semi-transparent border-top. The blur backdrop keeps content
+      slightly visible underneath. Works against both light and dark
+      Streamlit themes — explicit colours, not theme variables,
+      because Streamlit's CSS variable surface is unstable across
+      minor versions.
+    """
+    import html as _html
+    label = _html.escape(_t("nav.back_to_home"))
+    st.markdown(
+        f"""
+<style>
+[data-testid="stAppViewBlockContainer"] {{
+    padding-bottom: 3.5rem !important;
+}}
+.datatools-sticky-footer {{
+    position: fixed;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    background: rgba(255, 255, 255, 0.96);
+    backdrop-filter: blur(8px);
+    -webkit-backdrop-filter: blur(8px);
+    border-top: 1px solid rgba(49, 51, 63, 0.22);
+    padding: 0.45rem 1.25rem;
+    z-index: 9999;
+    display: flex;
+    align-items: center;
+    justify-content: flex-start;
+    font-family: inherit;
+}}
+.datatools-sticky-footer a {{
+    display: inline-block;
+    color: rgb(38, 39, 48);
+    text-decoration: none;
+    padding: 0.3rem 0.85rem;
+    border-radius: 0.5rem;
+    border: 1px solid rgba(49, 51, 63, 0.22);
+    background: rgb(240, 242, 246);
+    font-size: 14px;
+    font-weight: 500;
+    line-height: 1.4;
+    cursor: pointer;
+    transition: background 0.12s ease, border-color 0.12s ease;
+}}
+.datatools-sticky-footer a:hover {{
+    background: rgb(225, 228, 235);
+    border-color: rgba(49, 51, 63, 0.35);
+}}
+.datatools-sticky-footer a:active {{
+    background: rgb(210, 214, 222);
+}}
+</style>
+<div class="datatools-sticky-footer">
+    <a href="home" target="_self">{label}</a>
+</div>
+""",
+        unsafe_allow_html=True,
+    )
+
+
 def back_to_home_link(*, key: str = "_back_to_home_link") -> None:
     """Render a "← Back to Home" affordance on a tool page.
 

src/gui/pages/1_Deduplicator.py

@@ -19,6 +19,7 @@ from src.core.io import read_file, list_sheets, detect_encoding, detect_delimite
 from src.gui.components import (
     apply_review_decisions,
     back_to_home_link,
+    render_sticky_footer,
     config_panel,
     hide_streamlit_chrome,
     html_download_button,
@@ -27,10 +28,11 @@ from src.gui.components import (
     require_feature_or_render_upgrade,
     results_summary,
 )
+from src.i18n import t
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.DEDUPLICATOR)
 
 # ---------------------------------------------------------------------------
@@ -55,8 +57,8 @@ for key, default in _DEFAULTS.items():
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("🔍 Find Duplicates")
+st.title(t("tools.01_deduplicator.page_title"))
-st.caption("Find and remove duplicate rows in CSV, delimited text, and Excel files.")
+st.caption(t("tools.01_deduplicator.page_caption"))
 
 
 # ---------------------------------------------------------------------------
@@ -399,8 +401,6 @@ else:
 # Footer
 # ---------------------------------------------------------------------------
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption(
     "Runs locally. Your data never leaves this computer. "

src/gui/pages/2_Text_Cleaner.py

@@ -16,12 +16,14 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     html_download_button,
     pickup_or_upload,
     render_hidden_aware_preview,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.license import FeatureFlag
 from src.core.text_clean import (
     PRESETS,
@@ -32,7 +34,7 @@ from src.core.text_clean import (
 )
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.TEXT_CLEANER)
 
 
@@ -40,11 +42,8 @@ require_feature_or_render_upgrade(FeatureFlag.TEXT_CLEANER)
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("✂️ Clean Text")
+st.title(t("tools.02_text_cleaner.page_title"))
-st.caption(
+st.caption(t("tools.02_text_cleaner.page_caption"))
-    "Trim whitespace, fold smart quotes, strip invisible characters, and "
-    "normalize line endings. Runs locally — your data never leaves this computer."
-)
 
 # ---------------------------------------------------------------------------
 # File upload
@@ -379,8 +378,6 @@ with dl_c:
         mime="application/json",
     )
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 

src/gui/pages/3_Format_Standardizer.py

@@ -16,11 +16,13 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     html_download_button,
     pickup_or_upload,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.core.format_standardize import (
     PRESETS,
     FieldType,
@@ -30,7 +32,7 @@ from src.core.format_standardize import (
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.FORMAT_STANDARDIZER)
 
 
@@ -38,12 +40,8 @@ require_feature_or_render_upgrade(FeatureFlag.FORMAT_STANDARDIZER)
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("📐 Standardize Formats")
+st.title(t("tools.03_format_standardizer.page_title"))
-st.caption(
+st.caption(t("tools.03_format_standardizer.page_caption"))
-    "Canonicalize dates, phone numbers, currency, names, addresses, and "
-    "booleans on a per-column basis. Runs locally — your data never leaves "
-    "this computer."
-)
 
 
 # ---------------------------------------------------------------------------
@@ -650,8 +648,6 @@ with dl_c:
         mime="application/json",
     )
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 

src/gui/pages/4_Missing_Values.py

@@ -16,11 +16,13 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     html_download_button,
     pickup_or_upload,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.core.missing import (
     DEFAULT_SENTINELS,
     MissingOptions,
@@ -31,7 +33,7 @@ from src.core.missing import (
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.MISSING_HANDLER)
 
 
@@ -39,11 +41,8 @@ require_feature_or_render_upgrade(FeatureFlag.MISSING_HANDLER)
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("🕳️ Fix Missing Values")
+st.title(t("tools.04_missing_handler.page_title"))
-st.caption(
+st.caption(t("tools.04_missing_handler.page_caption"))
-    "Detect disguised nulls, profile missingness, and apply imputation or "
-    "drop strategies. Runs locally — your data never leaves this computer."
-)
 
 
 # ---------------------------------------------------------------------------
@@ -412,8 +411,6 @@ with dl_c:
         mime="application/json",
     )
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 

src/gui/pages/5_Column_Mapper.py

@@ -16,11 +16,13 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     html_download_button,
     pickup_or_upload,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.core.column_mapper import (
     MapOptions,
     PRESETS,
@@ -32,7 +34,7 @@ from src.core.column_mapper import (
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.COLUMN_MAPPER)
 
 
@@ -40,11 +42,8 @@ require_feature_or_render_upgrade(FeatureFlag.COLUMN_MAPPER)
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("🗂️ Map Columns")
+st.title(t("tools.05_column_mapper.page_title"))
-st.caption(
+st.caption(t("tools.05_column_mapper.page_caption"))
-    "Rename columns, enforce a target schema, and coerce types. Runs locally — "
-    "your data never leaves this computer."
-)
 
 
 # ---------------------------------------------------------------------------
@@ -456,8 +455,6 @@ with dl_c:
         mime="application/json",
     )
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 

src/gui/pages/6_Outlier_Detector.py

@@ -13,21 +13,23 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.OUTLIER_DETECTOR)
 
 # ---------------------------------------------------------------------------
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("📊 Find Unusual Values")
+st.title(t("tools.06_outlier_detector.page_title"))
-st.caption("Detect and handle outliers in numeric columns.")
+st.caption(t("tools.06_outlier_detector.page_caption"))
 
 st.info("This tool is under development.")
 
@@ -96,10 +98,9 @@ st.button("Detect Outliers", type="primary", use_container_width=True, disabled=
 # Footer
 # ---------------------------------------------------------------------------
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption(
     "Runs locally. Your data never leaves this computer. "
     "| DataTools v3.0"
 )
+

src/gui/pages/7_Multi_File_Merger.py

@@ -13,21 +13,23 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.MULTI_FILE_MERGER)
 
 # ---------------------------------------------------------------------------
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("📎 Combine Files")
+st.title(t("tools.07_multi_file_merger.page_title"))
-st.caption("Combine multiple CSV and Excel files into one dataset.")
+st.caption(t("tools.07_multi_file_merger.page_caption"))
 
 st.info("This tool is under development.")
 
@@ -94,10 +96,9 @@ st.button("Merge Files", type="primary", use_container_width=True, disabled=True
 # Footer
 # ---------------------------------------------------------------------------
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption(
     "Runs locally. Your data never leaves this computer. "
     "| DataTools v3.0"
 )
+

src/gui/pages/8_Validator_Reporter.py

@@ -13,21 +13,23 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.VALIDATOR_REPORTER)
 
 # ---------------------------------------------------------------------------
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("✅ Quality Check")
+st.title(t("tools.08_validator_reporter.page_title"))
-st.caption("Validate data against rules and generate quality reports.")
+st.caption(t("tools.08_validator_reporter.page_caption"))
 
 st.info("This tool is under development.")
 
@@ -101,10 +103,9 @@ st.button("Validate & Generate Report", type="primary", use_container_width=True
 # Footer
 # ---------------------------------------------------------------------------
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption(
     "Runs locally. Your data never leaves this computer. "
     "| DataTools v3.0"
 )
+

src/gui/pages/9_Pipeline_Runner.py

@@ -16,11 +16,13 @@ if str(_project_root) not in sys.path:
 
 from src.gui.components import (
     back_to_home_link,
+    render_sticky_footer,
     hide_streamlit_chrome,
     html_download_button,
     pickup_or_upload,
     require_feature_or_render_upgrade,
 )
+from src.i18n import t
 from src.core.pipeline import (
     Pipeline,
     SOFT_DEPENDENCIES,
@@ -33,7 +35,7 @@ from src.core.pipeline import (
 from src.license import FeatureFlag
 
 hide_streamlit_chrome()
-back_to_home_link()
+render_sticky_footer()
 require_feature_or_render_upgrade(FeatureFlag.PIPELINE_RUNNER)
 
 
@@ -41,11 +43,8 @@ require_feature_or_render_upgrade(FeatureFlag.PIPELINE_RUNNER)
 # Header
 # ---------------------------------------------------------------------------
 
-st.title("⚙️ Automated Workflows")
+st.title(t("tools.09_pipeline_runner.page_title"))
-st.caption(
+st.caption(t("tools.09_pipeline_runner.page_caption"))
-    "Chain DataTools cleaning steps into one repeatable workflow. The "
-    "pipeline recommends an order; you stay in control."
-)
 
 
 # ---------------------------------------------------------------------------
@@ -414,8 +413,6 @@ with dl_c:
         mime="application/json",
     )
 
-back_to_home_link(key="_back_to_home_link_bottom")
-
 st.divider()
 st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 

src/i18n/packs/en.json

@@ -106,39 +106,57 @@
   "tools": {
     "01_deduplicator": {
       "name": "Find Duplicates",
-      "description": "Fuzzy matching, normalization, survivor selection, and interactive review."
+      "description": "Fuzzy matching, normalization, survivor selection, and interactive review.",
+      "page_title": "🔍 Find Duplicates",
+      "page_caption": "Find and remove duplicate rows in CSV, delimited text, and Excel files."
     },
     "02_text_cleaner": {
       "name": "Clean Text",
-      "description": "Whitespace trim, multi-space collapse, Unicode normalization, BOM and line-ending handling."
+      "description": "Whitespace trim, multi-space collapse, Unicode normalization, BOM and line-ending handling.",
+      "page_title": "✂️ Clean Text",
+      "page_caption": "Trim whitespace, fold smart quotes, strip invisible characters, and normalize line endings. Runs locally — your data never leaves this computer."
     },
     "03_format_standardizer": {
       "name": "Standardize Formats",
-      "description": "Standardize dates, currencies, names, phone numbers, and addresses."
+      "description": "Standardize dates, currencies, names, phone numbers, and addresses.",
+      "page_title": "📐 Standardize Formats",
+      "page_caption": "Canonicalize dates, phone numbers, currency, names, addresses, and booleans on a per-column basis. Runs locally — your data never leaves this computer."
     },
     "04_missing_handler": {
       "name": "Fix Missing Values",
-      "description": "Detect disguised nulls, missingness analysis, and imputation strategies."
+      "description": "Detect disguised nulls, missingness analysis, and imputation strategies.",
+      "page_title": "🕳️ Fix Missing Values",
+      "page_caption": "Detect disguised nulls, profile missingness, and apply imputation or drop strategies. Runs locally — your data never leaves this computer."
     },
     "05_column_mapper": {
       "name": "Map Columns",
-      "description": "Rename columns, enforce a target schema, and coerce types."
+      "description": "Rename columns, enforce a target schema, and coerce types.",
+      "page_title": "🗂️ Map Columns",
+      "page_caption": "Rename columns, enforce a target schema, and coerce types. Runs locally — your data never leaves this computer."
     },
     "06_outlier_detector": {
       "name": "Find Unusual Values",
-      "description": "Z-score, IQR, and MAD detection with domain-rule violations and winsorization."
+      "description": "Z-score, IQR, and MAD detection with domain-rule violations and winsorization.",
+      "page_title": "📊 Find Unusual Values",
+      "page_caption": "Detect and handle outliers in numeric columns."
     },
     "07_multi_file_merger": {
       "name": "Combine Files",
-      "description": "Combine multiple CSV/Excel files with schema alignment."
+      "description": "Combine multiple CSV/Excel files with schema alignment.",
+      "page_title": "📎 Combine Files",
+      "page_caption": "Combine multiple CSV and Excel files into one dataset."
     },
     "08_validator_reporter": {
       "name": "Quality Check",
-      "description": "Validate against rules and generate PDF/Excel quality reports."
+      "description": "Validate against rules and generate PDF/Excel quality reports.",
+      "page_title": "✅ Quality Check",
+      "page_caption": "Validate data against rules and generate quality reports."
     },
     "09_pipeline_runner": {
       "name": "Automated Workflows",
-      "description": "Chain tools in recommended order and pass output between steps."
+      "description": "Chain tools in recommended order and pass output between steps.",
+      "page_title": "⚙️ Automated Workflows",
+      "page_caption": "Chain DataTools cleaning steps into one repeatable workflow. The pipeline recommends an order; you stay in control."
     }
   },
   "nav": {

src/i18n/packs/es.json

@@ -106,39 +106,57 @@
   "tools": {
     "01_deduplicator": {
       "name": "Buscar duplicados",
-      "description": "Coincidencia difusa, normalización, selección de superviviente y revisión interactiva."
+      "description": "Coincidencia difusa, normalización, selección de superviviente y revisión interactiva.",
+      "page_title": "🔍 Buscar duplicados",
+      "page_caption": "Encuentra y elimina filas duplicadas en archivos CSV, texto delimitado y Excel."
     },
     "02_text_cleaner": {
       "name": "Limpiar texto",
-      "description": "Recorte de espacios, colapso de espacios múltiples, normalización Unicode, manejo de BOM y de finales de línea."
+      "description": "Recorte de espacios, colapso de espacios múltiples, normalización Unicode, manejo de BOM y de finales de línea.",
+      "page_title": "✂️ Limpiar texto",
+      "page_caption": "Recorta espacios, normaliza comillas tipográficas, elimina caracteres invisibles y unifica saltos de línea. Se ejecuta localmente — tus datos nunca salen de este equipo."
     },
     "03_format_standardizer": {
       "name": "Estandarizar formatos",
-      "description": "Estandariza fechas, monedas, nombres, números de teléfono y direcciones."
+      "description": "Estandariza fechas, monedas, nombres, números de teléfono y direcciones.",
+      "page_title": "📐 Estandarizar formatos",
+      "page_caption": "Canoniza fechas, números de teléfono, monedas, nombres, direcciones y booleanos columna por columna. Se ejecuta localmente — tus datos nunca salen de este equipo."
     },
     "04_missing_handler": {
       "name": "Corregir valores faltantes",
-      "description": "Detecta nulos disfrazados, analiza la ausencia de datos y aplica estrategias de imputación."
+      "description": "Detecta nulos disfrazados, analiza la ausencia de datos y aplica estrategias de imputación.",
+      "page_title": "🕳️ Corregir valores faltantes",
+      "page_caption": "Detecta nulos disfrazados, perfila la ausencia de datos y aplica imputación o estrategias de descarte. Se ejecuta localmente — tus datos nunca salen de este equipo."
     },
     "05_column_mapper": {
       "name": "Mapear columnas",
-      "description": "Renombra columnas, aplica un esquema objetivo y fuerza tipos de datos."
+      "description": "Renombra columnas, aplica un esquema objetivo y fuerza tipos de datos.",
+      "page_title": "🗂️ Mapear columnas",
+      "page_caption": "Renombra columnas, aplica un esquema objetivo y fuerza tipos. Se ejecuta localmente — tus datos nunca salen de este equipo."
     },
     "06_outlier_detector": {
       "name": "Detectar valores atípicos",
-      "description": "Detección por Z-score, IQR y MAD con reglas de dominio y winsorización."
+      "description": "Detección por Z-score, IQR y MAD con reglas de dominio y winsorización.",
+      "page_title": "📊 Detectar valores atípicos",
+      "page_caption": "Detecta y trata valores atípicos en columnas numéricas."
     },
     "07_multi_file_merger": {
       "name": "Combinar archivos",
-      "description": "Combina varios archivos CSV/Excel alineando sus esquemas."
+      "description": "Combina varios archivos CSV/Excel alineando sus esquemas.",
+      "page_title": "📎 Combinar archivos",
+      "page_caption": "Combina varios archivos CSV y Excel en un único conjunto de datos."
     },
     "08_validator_reporter": {
       "name": "Verificación de calidad",
-      "description": "Valida contra reglas y genera informes de calidad en PDF/Excel."
+      "description": "Valida contra reglas y genera informes de calidad en PDF/Excel.",
+      "page_title": "✅ Verificación de calidad",
+      "page_caption": "Valida datos contra reglas y genera informes de calidad."
     },
     "09_pipeline_runner": {
       "name": "Flujos automatizados",
-      "description": "Encadena herramientas en el orden recomendado y pasa la salida entre pasos."
+      "description": "Encadena herramientas en el orden recomendado y pasa la salida entre pasos.",
+      "page_title": "⚙️ Flujos automatizados",
+      "page_caption": "Encadena pasos de limpieza de DataTools en un flujo repetible. La canalización recomienda un orden; tú mantienes el control."
     }
   },
   "nav": {

tests/gui/test_smoke.py

@@ -52,15 +52,15 @@ PAGE_SLUGS = [
 # When a page gains real Spanish translation, flip its 'es' entry to
 # the localized substring — the test surface stays the same.
 EXPECTED_SUBSTRINGS: dict[str, dict[str, str]] = {
-    "1_Deduplicator":        {"en": "Find Duplicates",   "es": "Find Duplicates"},
+    "1_Deduplicator":        {"en": "Find Duplicates",   "es": "Buscar duplicados"},
-    "2_Text_Cleaner":        {"en": "Clean Text",        "es": "Clean Text"},
+    "2_Text_Cleaner":        {"en": "Clean Text",        "es": "Limpiar texto"},
-    "3_Format_Standardizer": {"en": "Standardize",       "es": "Standardize"},
+    "3_Format_Standardizer": {"en": "Standardize",       "es": "Estandarizar"},
-    "4_Missing_Values":      {"en": "Fix Missing",       "es": "Fix Missing"},
+    "4_Missing_Values":      {"en": "Fix Missing",       "es": "Corregir valores"},
-    "5_Column_Mapper":       {"en": "Map Columns",       "es": "Map Columns"},
+    "5_Column_Mapper":       {"en": "Map Columns",       "es": "Mapear columnas"},
-    "6_Outlier_Detector":    {"en": "Unusual",           "es": "Unusual"},
+    "6_Outlier_Detector":    {"en": "Unusual",           "es": "atípicos"},
-    "7_Multi_File_Merger":   {"en": "Combine Files",     "es": "Combine Files"},
+    "7_Multi_File_Merger":   {"en": "Combine Files",     "es": "Combinar archivos"},
-    "8_Validator_Reporter":  {"en": "Quality Check",     "es": "Quality Check"},
+    "8_Validator_Reporter":  {"en": "Quality Check",     "es": "Verificación de calidad"},
-    "9_Pipeline_Runner":     {"en": "Automated",         "es": "Automated"},
+    "9_Pipeline_Runner":     {"en": "Automated",         "es": "Flujos automatizados"},
     "99_Close":              {"en": "Shutting down",     "es": "Cerrando"},
 }