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, 7 insertions, 7 deletions

diff --git a/internal/web/templates/admin/new_user.html b/internal/web/templates/admin/new_user.html
index 3d93dbd..f1c79be 100644
--- a/internal/web/templates/admin/new_user.html
+++ b/internal/web/templates/admin/new_user.html
@@ -1,15 +1,15 @@
-{{define "title"}}New blogger · Blogspace{{end}}
+{{define "title"}}{{t "New blogger"}} · Blogspace{{end}}
 {{define "content"}}
 <div class="card narrow">
-  <h1>New blogger</h1>
+  <h1>{{t "New blogger"}}</h1>
   <form method="post" action="/admin/users/new">
     <input type="hidden" name="_csrf" value="{{.CSRF}}">
-    <label>Username<br><input name="username" value="{{.Data.username}}" required pattern="[a-zA-Z0-9_.-]{2,40}" autofocus></label>
-    <label>Password <span class="muted">(min 8 characters; they can change it later)</span><br><input type="password" name="password" required minlength="8"></label>
-    <label>Subdomain <span class="muted">(defaults to the username)</span><br>
+    <label>{{t "Username"}}<br><input name="username" value="{{.Data.username}}" required pattern="[a-zA-Z0-9_.-]{2,40}" autofocus></label>
+    <label>{{t "Password"}} <span class="muted">({{t "min 8 characters; they can change it later"}})</span><br><input type="password" name="password" required minlength="8"></label>
+    <label>{{t "Subdomain"}} <span class="muted">({{t "defaults to the username"}})</span><br>
       <span class="nowrap"><input name="subdomain" value="{{.Data.subdomain}}" pattern="[a-z0-9]([a-z0-9-]*[a-z0-9])?" maxlength="63" size="14" style="width:auto">.{{.Data.cfg.BaseDomain}}</span></label>
-    <label>Blog title<br><input name="title" value="{{.Data.title}}" maxlength="120"></label>
-    <p class="actionrow"><button type="submit">Create</button> <a href="/admin/">Cancel</a></p>
+    <label>{{t "Blog title"}}<br><input name="title" value="{{.Data.title}}" maxlength="120"></label>
+    <p class="actionrow"><button type="submit">{{t "Create"}}</button> <a href="/admin/">{{t "Cancel"}}</a></p>
   </form>
 </div>
 {{end}}