fix(footer,nav): left-justify buttons, drop per-page caption bar, hide sidebar Close

Three small follow-ups to the sticky-footer rework:

- Left-justify the footer buttons (and reposition the Help popover
  to anchor at the left edge so it lines up with its trigger).
- Remove the per-page ``st.divider() + st.caption("Runs locally…")``
  trailing block from all 9 tool pages. The new sticky footer
  covers that text, so it was rendering as an empty white bar at
  the bottom of each tool page.
- Hide the Close entry from the sidebar nav via CSS. The page stays
  registered with st.navigation so /close is still routable for the
  sticky-footer Close button — only the sidebar link + its section
  header are hidden (via :has() on stNavSection).

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

src/gui/app.py

@@ -94,6 +94,11 @@ def _build_navigation() -> dict[str, list]:
         icon="🔑",
         url_path="activate",
     )
+    # Close is registered so it remains URL-routable (/close) for the
+    # sticky-footer Close button. It is hidden from the sidebar via CSS
+    # in ``hide_streamlit_chrome`` rather than being unregistered —
+    # ``st.navigation`` requires every routable page to be listed; pages
+    # not in the dict 404 even by direct URL hit.
     close = st.Page(
         "pages/99_Close.py",
         title=_t("nav.close_title") or "Close",
@@ -103,9 +108,6 @@ def _build_navigation() -> dict[str, list]:
 
     account_header = _t("nav.section_account") or "Account"
     close_header = _t("nav.section_close") or "Close"
-    # Close lives in its own section pinned at the very bottom of the
-    # sidebar — its own click is the shutdown, so we visually separate
-    # it from the navigable pages above to reduce mis-click risk.
     return {
         "": [home],
         section_label("cleaners"): by_section["cleaners"],

src/gui/components/_legacy.py

@@ -60,6 +60,24 @@ header[data-testid="stHeader"] {
 footer {
     display: none !important;
 }
+/* Hide the "Close" entry from the sidebar nav — the page is kept
+   registered so the sticky-footer Close link can still route to
+   /close, but the sidebar entry is redundant and risks mis-clicks. */
+[data-testid="stSidebarNav"] a[href$="/close"],
+[data-testid="stSidebarNav"] a[href$="/close/"] {
+    display: none !important;
+}
+/* Hide the entire "Close" section so its header label doesn't
+   orphan above the hidden link. Streamlit tags each nav section
+   with ``data-testid="stNavSection"``; the :has() selector picks
+   only the one containing the close link. Modern browsers (Chrome
+   105+, Safari 15.4+, Firefox 121+) all support it; older
+   browsers fall back to showing the empty header, which is
+   visually harmless. */
+[data-testid="stSidebarNav"] [data-testid="stNavSection"]:has(a[href$="/close"]),
+[data-testid="stSidebarNav"] [data-testid="stNavSection"]:has(a[href$="/close/"]) {
+    display: none !important;
+}
 /* Reclaim top padding lost from hidden header. Slim the bottom too —
    Streamlit's default leaves several rems below the last widget. */
 .stAppViewBlockContainer,
@@ -572,7 +590,7 @@ def render_sticky_footer() -> None:
     z-index: 2147483646 !important;
     display: flex !important;
     align-items: center !important;
-    justify-content: flex-end !important;
+    justify-content: flex-start !important;
     gap: 0.4rem !important;
     font-family: system-ui, -apple-system, sans-serif !important;
     box-sizing: border-box !important;
@@ -605,7 +623,7 @@ def render_sticky_footer() -> None:
 }
 #datatools-help-popover {
     position: fixed !important;
-    right: 0.75rem !important;
+    left: 0.75rem !important;
     bottom: 44px !important;
     background: white !important;
     border: 1px solid rgba(49, 51, 63, 0.25) !important;

src/gui/pages/1_Deduplicator.py

@@ -402,17 +402,6 @@ else:
     st.info("Upload a file to get started.")
 
 
-# ---------------------------------------------------------------------------
-# Footer
-# ---------------------------------------------------------------------------
-
-
-st.divider()
-st.caption(
-    "Runs locally. Your data never leaves this computer. "
-    "| DataTools v3.0"
-)
-
 # ---------------------------------------------------------------------------
 # Post-run auto-scroll
 # ---------------------------------------------------------------------------

src/gui/pages/2_Text_Cleaner.py

@@ -384,8 +384,6 @@ with dl_c:
     )
 
 
-st.divider()
-st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 
 # ---------------------------------------------------------------------------
 # Post-run auto-scroll

src/gui/pages/3_Format_Standardizer.py

@@ -654,8 +654,6 @@ with dl_c:
     )
 
 
-st.divider()
-st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 
 # ---------------------------------------------------------------------------
 # Post-run auto-scroll

src/gui/pages/4_Missing_Values.py

@@ -417,8 +417,6 @@ with dl_c:
     )
 
 
-st.divider()
-st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
 
 # ---------------------------------------------------------------------------
 # Post-run auto-scroll

src/gui/pages/5_Column_Mapper.py

@@ -461,9 +461,6 @@ with dl_c:
     )
 
 
-st.divider()
-st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
-
 # ---------------------------------------------------------------------------
 # Post-run auto-scroll
 # ---------------------------------------------------------------------------

src/gui/pages/6_Outlier_Detector.py

@@ -97,14 +97,3 @@ st.selectbox("Action", ["Flag only (add column)", "Remove outlier rows", "Cap /
 st.divider()
 st.button("Detect Outliers", type="primary", use_container_width=True, disabled=True)
 
-# ---------------------------------------------------------------------------
-# Footer
-# ---------------------------------------------------------------------------
-
-
-st.divider()
-st.caption(
-    "Runs locally. Your data never leaves this computer. "
-    "| DataTools v3.0"
-)
-

src/gui/pages/7_Multi_File_Merger.py

@@ -95,14 +95,3 @@ st.checkbox("Add source filename column", value=True, disabled=True)
 st.divider()
 st.button("Merge Files", type="primary", use_container_width=True, disabled=True)
 
-# ---------------------------------------------------------------------------
-# Footer
-# ---------------------------------------------------------------------------
-
-
-st.divider()
-st.caption(
-    "Runs locally. Your data never leaves this computer. "
-    "| DataTools v3.0"
-)
-

src/gui/pages/8_Validator_Reporter.py

@@ -102,14 +102,3 @@ st.selectbox("Output format", ["Excel (flagged rows)", "PDF summary", "Both"], d
 st.divider()
 st.button("Validate & Generate Report", type="primary", use_container_width=True, disabled=True)
 
-# ---------------------------------------------------------------------------
-# Footer
-# ---------------------------------------------------------------------------
-
-
-st.divider()
-st.caption(
-    "Runs locally. Your data never leaves this computer. "
-    "| DataTools v3.0"
-)
-

src/gui/pages/9_Pipeline_Runner.py

@@ -419,9 +419,6 @@ with dl_c:
     )
 
 
-st.divider()
-st.caption("Runs locally. Your data never leaves this computer. | DataTools v3.0")
-
 # ---------------------------------------------------------------------------
 # Post-run auto-scroll
 # ---------------------------------------------------------------------------