Add post tags, with a tag page and two side-column modules

Posts can now carry tags, set on the post form as a checklist of the
blog's existing tags plus a comma-separated box for new ones (no JS).
A tag is a name and a unique slug, so "Go" and "go" are one tag and
Greek tags get readable URLs; tags no post uses any more are deleted.

On the blog, tags appear under the post date and link to /tag/<slug>,
which lists the published posts from every page, paginated like a page.
Two new layout modules show them: a Tags list (with counts, by use) and
a Tag cloud (alphabetical, sized by use). Both are only fetched when a
visible module needs them.

The article loop and pager move to a shared postlist partial; while
there, the pager stops adding a trailing slash — /news/?p=2 was a 404
because a {page} wildcard never matches one.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/internal/web/routes.go b/internal/web/routes.go
index 26264ef..a8a60d2 100644
--- a/internal/web/routes.go
+++ b/internal/web/routes.go
@@ -95,6 +95,7 @@ func (s *Server) rootRoutes() http.Handler {
 func (s *Server) blogRoutes(m *http.ServeMux, wrap func(http.HandlerFunc) http.HandlerFunc) {
 	m.HandleFunc("GET /{$}", wrap(s.handleBlogHome))
 	m.HandleFunc("GET /feed.xml", wrap(s.handleBlogFeed))
+	m.HandleFunc("GET /tag/{tag}", wrap(s.handleBlogTag)) // literal segment: wins over /{page}/{post}
 	m.HandleFunc("GET /{page}", wrap(s.handleBlogPage))
 	m.HandleFunc("GET /{page}/{post}", wrap(s.handleBlogPost))
 }