fix: say nothing was found on the first screen

install.py

@@ -12137,10 +12137,17 @@ def _view_platforms(state: TuiState, width: int, height: int) -> tuple:
     else:
         title = "Which setup?"
         before = ["Choose the setup that will use the BIOS files."]
+    pinned = list(state.refused)
+    if state.dest_given is None and not state.setups and len(state.stack) == 1:
+        # The first screen when nothing was found: at 40x15 its 18 rows
+        # left no line to say so, or what to do.
+        pinned.append("Nothing was found here: choose the setup that will use the "
+                      "BIOS files.")
+        before = []
     needle = state.filters.get("platforms", "")
     after = [f"No setup matches '{needle}'."] if len(rows) == 1 and needle else []
     after += [state.status] if state.status else []
-    return (title, _compose(state, width, height, before, rows, after, pinned=state.refused),
+    return (title, _compose(state, width, height, before, rows, after, pinned=pinned),
             ("A/Enter Choose", "B/Esc Back", "/ Filter", "? Help"))
 
 

tests/test_install_tui.py

@@ -3908,6 +3908,25 @@ class TheFolderScreenSaysWhatItOffers(unittest.TestCase):
                 self.assertEqual(rows[state.focus["folder"]].action, "browse")
 
 
+class NothingFoundIsSaid(unittest.TestCase):
+    """With nothing detected the first screen was the list of 18 setups,
+    with no line at 40x15 saying nothing was found, which the beginner's
+    page names."""
+
+    def test_at_every_size(self):
+        with mock.patch.object(install, "detect_platforms", return_value=[]), \
+                mock.patch.object(install, "detect_frontends", return_value=[]), \
+                mock.patch.object(install, "_mounted_cards", return_value=[]):
+            state, _effects = install.tui_start(_args(), "linux")
+        self.assertEqual(state.screen, "platforms")
+        for cols, rows in ((40, 12), (40, 15), (80, 24)):
+            with self.subTest(size=f"{cols}x{rows}"):
+                screen = " ".join(" ".join(install.tui_view(state, cols, rows)).split())
+                self.assertIn("Nothing was found here", screen)
+        page = (REPO_ROOT / "wiki" / "first-install.md").read_text(encoding="utf-8")
+        self.assertIn("Nothing was found here", page)
+
+
 class AFocusesNoSystemFolder(unittest.TestCase):
     """At / A went into bin/, and at a drive root holding $RECYCLE.BIN into
     the recycle bin, which Use this folder then took as the BIOS folder."""

wiki/first-install.md

@@ -134,7 +134,7 @@ The result says how to restore them.
 
 ### Nothing was found here.
 
-Choose **Another setup or folder**, then your setup and its folder.
+The screen lists every setup: choose yours, then its folder.
 
 ### Error: Python 3.8 or newer is required.