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, 7 insertions, 0 deletions

diff --git a/internal/db/migrations/blog/00012_page_show_notices.sql b/internal/db/migrations/blog/00012_page_show_notices.sql
new file mode 100644
index 0000000..da4ff3d
--- /dev/null
+++ b/internal/db/migrations/blog/00012_page_show_notices.sql
@@ -0,0 +1,7 @@
+-- +goose Up
+-- A per-page switch for the announcements: an "About" page can do without
+-- the notices the home page carries.
+ALTER TABLE pages ADD COLUMN show_notices boolean NOT NULL DEFAULT true;
+
+-- +goose Down
+ALTER TABLE pages DROP COLUMN show_notices;