Add languages: English and Greek, chosen per blog on the Settings tab

Every blog and its dashboard were hard-wired to English. A blogger can
now pick the language of their blog; it switches the whole dashboard and
the blog's fixed text — post dates, archive months, the RSS link, the
pager, the 404 page — while what the blogger wrote is left alone.

The new internal/i18n package keys translations by the English string,
so an untranslated key renders as English rather than blank, and
TestGreekCatalogComplete scans the templates and handlers to fail when
the Greek catalog misses a key or keeps a stale one. Templates are
compiled once per language with t/tf/date/postdate/month closed over the
language, so they need no data plumbing.

The language lives in settings.language (blog migration 00002), not in
the theme, so "Reset design" does not touch it. Public pages use the
blog's language; management pages use the logged-in user's own blog's,
so a superadmin editing someone else's blog keeps theirs; the login page
follows Accept-Language.

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

1 files changed, 14 insertions, 14 deletions

diff --git a/internal/web/templates/dashboard/module_form.html b/internal/web/templates/dashboard/module_form.html
index b63b405..0cd27fa 100644
--- a/internal/web/templates/dashboard/module_form.html
+++ b/internal/web/templates/dashboard/module_form.html
@@ -2,32 +2,32 @@
 {{define "content"}}
 {{$m := .Data.module}}
 <div class="card">
-  <h1>{{.Data.name}} <span class="muted small">in the {{lower .Data.area}}</span></h1>
+  <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 $m.Area "footer")))}}
-    <label>Heading <span class="muted">(optional)</span><br><input name="title" value="{{$m.Title}}" maxlength="120" placeholder="{{if eq $m.Kind "recent"}}Recent posts{{else if eq $m.Kind "archive"}}Archive{{else if eq $m.Kind "sitemap"}}Pages{{end}}"></label>
+    <label>{{t "Heading"}} <span class="muted">({{t "optional"}})</span><br><input name="title" value="{{$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>
     {{end}}
     {{if eq $m.Kind "recent"}}
-    <div class="row"><label>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>
-    <p class="muted small">The newest published posts from every page of your blog, newest first.</p>
+    <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>
+    <p class="muted small">{{t "The newest published posts from every page of your blog, newest first."}}</p>
     {{else if eq $m.Kind "archive"}}
-    <p class="muted small">Every published post grouped by year and month, newest first. Years and months fold open and shut; the latest year starts open.</p>
+    <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">Links to every page of your blog.</p>
+    <p class="muted small">{{t "Links to every page of your blog."}}</p>
     {{else if eq $m.Kind "html"}}
     <label for="mod-body">HTML</label>
-    <textarea id="mod-body" name="body" rows="14" class="mono" spellcheck="false" placeholder="&lt;p&gt;Hello!&lt;/p&gt;">{{$m.Body}}</textarea>
-    <p class="muted small">Put into your page exactly as written — embeds, badges and scripts all work. Anything broken here (an unclosed tag, say) can break the page around it, so check your blog after saving. 20 KB at most.</p>
+    <textarea id="mod-body" name="body" rows="14" class="mono" spellcheck="false" placeholder="&lt;p&gt;{{t "Hello!"}}&lt;/p&gt;">{{$m.Body}}</textarea>
+    <p class="muted small">{{t "Put into your page exactly as written — embeds, badges and scripts all work. Anything broken here (an unclosed tag, say) can break the page around it, so check your blog after saving. 20 KB at most."}}</p>
     {{else if eq $m.Kind "text"}}
-    <label for="mod-body">Text</label>
-    <textarea id="mod-body" name="body" rows="4" placeholder="© 2026 Me">{{$m.Body}}</textarea>
-    <p class="muted small">Plain text; each line becomes its own paragraph.</p>
+    <label for="mod-body">{{t "Text"}}</label>
+    <textarea id="mod-body" name="body" rows="4" placeholder="{{t "© 2026 Me"}}">{{$m.Body}}</textarea>
+    <p class="muted small">{{t "Plain text; each line becomes its own paragraph."}}</p>
     {{end}}
     <p class="actionrow">
-      <button type="submit">Save</button>
-      <a class="btn secondary" href="{{.BlogURL}}" target="_blank">View blog &#8599;</a>
-      <a href="/b/{{.Blog.Subdomain}}/layout#{{if or (eq $m.Area "above") (eq $m.Area "below")}}main{{else}}{{$m.Area}}{{end}}">Back to layout</a>
+      <button type="submit">{{t "Save"}}</button>
+      <a class="btn secondary" href="{{.BlogURL}}" target="_blank">{{t "View blog"}} &#8599;</a>
+      <a href="/b/{{.Blog.Subdomain}}/layout#{{if or (eq $m.Area "above") (eq $m.Area "below")}}main{{else}}{{$m.Area}}{{end}}">{{t "Back to layout"}}</a>
     </p>
   </form>
 </div>