Add switches to keep announcements off a page or off post pages

Announcements showed on every public page. Now each page has a "Show
announcements on this page" checkbox (pages.show_notices, on by default)
that covers the page and its posts, and the Design tab's Content section
has "Show announcements on post pages" (theme.post_notices, on by default)
for bloggers who want notices only on listings, not while reading a post.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd8UPWrvyYCLj97JexNw3A

1 files changed, 16 insertions, 0 deletions

diff --git a/internal/web/web_test.go b/internal/web/web_test.go
index a7c189f..34ec057 100644
--- a/internal/web/web_test.go
+++ b/internal/web/web_test.go
@@ -138,6 +138,22 @@ func TestThemeNormalizeAndCSS(t *testing.T) {
 	}
 }
 
+// Announcements on post pages are on by default (the look blogs had before
+// the switch) and, like every checkbox, off when the box is unticked; stored
+// themes from before the option get the default too.
+func TestPostNotices(t *testing.T) {
+	if !DefaultTheme().PostNotices || !ParseTheme([]byte(`{"show_dates":false}`)).PostNotices {
+		t.Error("post notices should default to on")
+	}
+	th := ThemeFromForm(DefaultTheme(), url.Values{"post_notices": {"on"}})
+	if !th.PostNotices {
+		t.Errorf("ticked: %+v", th)
+	}
+	if th = ThemeFromForm(th, url.Values{"show_dates": {"on"}}); th.PostNotices {
+		t.Errorf("unticked: %+v", th)
+	}
+}
+
 // The rule under titles is a body class blog.css draws from, coloured by the
 // theme CSS; the tag hash is a plain flag the templates read.
 func TestTitleRuleAndTagHash(t *testing.T) {