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, 7 insertions, 2 deletions

diff --git a/internal/web/templates/dashboard/module_form.html b/internal/web/templates/dashboard/module_form.html
index 0cd27fa..8b28f2e 100644
--- a/internal/web/templates/dashboard/module_form.html
+++ b/internal/web/templates/dashboard/module_form.html
@@ -5,8 +5,8 @@
   <h1>{{.Data.name}} <span class="muted small">{{tf "in the %s" (lower .Data.area)}}</span></h1>
   <form method="post">
     <input type="hidden" name="_csrf" value="{{.CSRF}}">
-    {{if or (eq $m.Kind "recent") (eq $m.Kind "archive") (eq $m.Kind "sitemap") (and (eq $m.Kind "html") (or (eq $m.Area "left") (eq $m.Area "right") (eq $m.Area "footer")))}}
-    <label>{{t "Heading"}} <span class="muted">({{t "optional"}})</span><br><input name="title" value="{{$m.Title}}" maxlength="120" placeholder="{{if eq $m.Kind "recent"}}{{t "Recent posts"}}{{else if eq $m.Kind "archive"}}{{t "Archive"}}{{else if eq $m.Kind "sitemap"}}{{t "Pages"}}{{end}}"></label>
+    {{if or (eq $m.Kind "recent") (eq $m.Kind "archive") (eq $m.Kind "sitemap") (eq $m.Kind "tags") (eq $m.Kind "tagcloud") (and (eq $m.Kind "html") (or (eq $m.Area "left") (eq $m.Area "right") (eq $m.Area "footer")))}}
+    <label>{{t "Heading"}} <span class="muted">({{t "optional"}})</span><br><input name="title" value="{{$m.Title}}" maxlength="120" placeholder="{{if eq $m.Kind "recent"}}{{t "Recent posts"}}{{else if eq $m.Kind "archive"}}{{t "Archive"}}{{else if eq $m.Kind "sitemap"}}{{t "Pages"}}{{else if eq $m.Kind "tags"}}{{t "Tags"}}{{else if eq $m.Kind "tagcloud"}}{{t "Tag cloud"}}{{end}}"></label>
     {{end}}
     {{if eq $m.Kind "recent"}}
     <div class="row"><label>{{t "How many posts"}}<br><select name="count">{{range $n := .Data.counts}}<option value="{{$n}}"{{if eq $n $m.Count}} selected{{end}}>{{$n}}</option>{{end}}</select></label></div>
@@ -15,6 +15,11 @@
     <p class="muted small">{{t "Every published post grouped by year and month, newest first. Years and months fold open and shut; the latest year starts open."}}</p>
     {{else if eq $m.Kind "sitemap"}}
     <p class="muted small">{{t "Links to every page of your blog."}}</p>
+    {{else if eq $m.Kind "tags"}}
+    <div class="row"><label>{{t "How many tags"}}<br><select name="count"><option value="0"{{if eq $m.Count 0}} selected{{end}}>{{t "All"}}</option>{{range $n := .Data.tagCounts}}<option value="{{$n}}"{{if eq $n $m.Count}} selected{{end}}>{{$n}}</option>{{end}}</select></label></div>
+    <p class="muted small">{{t "Your tags with the number of posts in each, most used first. Only published posts count."}}</p>
+    {{else if eq $m.Kind "tagcloud"}}
+    <p class="muted small">{{t "Every tag in alphabetical order, bigger the more posts use it."}}</p>
     {{else if eq $m.Kind "html"}}
     <label for="mod-body">HTML</label>
     <textarea id="mod-body" name="body" rows="14" class="mono" spellcheck="false" placeholder="&lt;p&gt;{{t "Hello!"}}&lt;/p&gt;">{{$m.Body}}</textarea>