test: make the smoke script use relative dates

The script hardcoded 2026-09-05, so at the next midnight that became "some
day in the past" and the assertions quietly changed meaning: today turned
into an unlogged row, and a refute on "Ei merkintää" started matching it
instead of the day under test. Dates are now computed at run time.

That refute was wrong regardless. It denied the string across the whole page,
but every unlogged day legitimately renders one. It now asserts positively
that the entry is still shown while the delete is being confirmed.

scripts/smoke.sh

@@ -11,6 +11,12 @@ cd "$(dirname "$0")/.."
 
 addr=127.0.0.1:8099
 pass=smoke
+
+# Dates are relative, never literal. A hardcoded one turns into "some day in
+# the past" at the next midnight, and the assertions quietly start meaning
+# something else.
+d0=$(date +%F)
+d1=$(date -d yesterday +%F)
 tmp=$(mktemp -d)
 trap 'kill ${srv:-0} 2>/dev/null || true; rm -rf "$tmp"' EXIT
 
@@ -134,51 +140,53 @@ check "picking a dish opens the sides step" \
 
 check "saving redirects back to the day" \
 	"$(curl -s -o /dev/null -w '%{http_code}' -u ":$pass" \
-		-d "pvm=2026-09-05&ruoka=$ruoka" "http://$addr/kirjaa")" "303"
+		-d "pvm=$d0&ruoka=$ruoka" "http://$addr/kirjaa")" "303"
 
 check "the saved day shows what was eaten" \
-	"$(curl -s -u ":$pass" "http://$addr/?pvm=2026-09-05")" "kirjattu"
+	"$(curl -s -u ":$pass" "http://$addr/?pvm=$d0")" "kirjattu"
 
 # The selected day expands inside the list rather than in a panel above it,
 # so the rows below do not shift when one is tapped.
-day=$(curl -s -u ":$pass" "http://$addr/?pvm=2026-09-05")
+day=$(curl -s -u ":$pass" "http://$addr/?pvm=$d0")
 check "the selected day expands in place" "$day" 'class="open"'
 check "and stays in the list rather than being lifted out" "$day" "kirjattu"
 
 # ---- the day list patches in place instead of navigating ----------------
 
-dayp=$(curl -s -u ":$pass" -H 'Datastar-Request: true' "http://$addr/paiva?pvm=2026-09-05")
+dayp=$(curl -s -u ":$pass" -H 'Datastar-Request: true' "http://$addr/paiva?pvm=$d0")
 check "opening a day patches the list" "$dayp" 'id="paivat"'
 refute "and returns a fragment, not a page" "$dayp" "<html"
 
 check "picking a dish patches to the sides step" \
 	"$(curl -s -u ":$pass" -H 'Datastar-Request: true' \
-		"http://$addr/paiva?pvm=2026-09-05&ruoka=$ruoka")" "Tallenna"
+		"http://$addr/paiva?pvm=$d0&ruoka=$ruoka")" "Tallenna"
 
 check "saving from Datastar patches back" \
 	"$(curl -s -u ":$pass" -H 'Datastar-Request: true' \
-		-d "pvm=2026-09-04&ruoka=$ruoka" "http://$addr/kirjaa")" 'id="paivat"'
+		-d "pvm=$d1&ruoka=$ruoka" "http://$addr/kirjaa")" 'id="paivat"'
 
 check "deleting from Datastar patches back" \
 	"$(curl -s -u ":$pass" -H 'Datastar-Request: true' \
-		-d "pvm=2026-09-04" "http://$addr/poista")" 'id="paivat"'
+		-d "pvm=$d1" "http://$addr/poista")" 'id="paivat"'
 
 # Without the header it must still redirect, for no JavaScript.
 check "a plain save still redirects to the day" \
 	"$(curl -s -o /dev/null -w '%{redirect_url}' -u ":$pass" \
-		-d "pvm=2026-09-04&ruoka=$ruoka" "http://$addr/kirjaa")" "pvm=2026-09-04"
+		-d "pvm=$d1&ruoka=$ruoka" "http://$addr/kirjaa")" "pvm=$d1"
 
 # Deleting a logged meal drops the row outright, so it asks first.
-saved=$(curl -s -u ":$pass" "http://$addr/?pvm=2026-09-05&poista=1")
+saved=$(curl -s -u ":$pass" "http://$addr/?pvm=$d0&poista=1")
 check "deleting a meal asks first" "$saved" "Poistetaanko merkintä?"
-refute "and does not delete while asking" "$saved" "Ei merkintää"
+# Assert the entry is still shown, rather than that no gap row exists anywhere
+# on the page: other days are legitimately unlogged and render their own.
+check "and the entry is still there while asking" "$saved" "kirjattu"
 
 check "deleting redirects back" \
 	"$(curl -s -o /dev/null -w '%{http_code}' -u ":$pass" \
-		-d "pvm=2026-09-05" "http://$addr/poista")" "303"
+		-d "pvm=$d0" "http://$addr/poista")" "303"
 
 check "the day is empty again" \
-	"$(curl -s -u ":$pass" "http://$addr/?pvm=2026-09-05")" "Etsi"
+	"$(curl -s -u ":$pass" "http://$addr/?pvm=$d0")" "Etsi"
 
 check "search filters the board" \
 	"$(curl -s -u ":$pass" "http://$addr/?haku=keitto")" "keitto"