Chrome speaks the site's language: site.yaml lang + i18n table

The strings the portal itself says - Asked by, Also worth asking,
Sign in, the not-found page, defaults - translate via a small en/no
table selected by site.yaml's lang, which also sets the html lang
attribute. Content keeps speaking for itself; unknown languages fall
back to English per key.

Also: a scheme-gated markdown image now swallows its alt text instead
of leaking it as stray text - this is the fix for the test that has
been red since 0.3.19 (publish is tag-triggered and does not gate on
the test workflow; caught late).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y42TyF8Zu7NGRR2893vNcZ

src/content.rs

@@ -183,6 +183,7 @@ pub fn render_inline_markdown(text: &str) -> String {
     use pulldown_cmark::{html, Event, Options, Parser, Tag, TagEnd};
     let parser = Parser::new_ext(text, Options::empty());
     let mut in_link = 0usize;
+    let mut in_dropped_image = 0usize;
     let filtered = parser.filter_map(|event| match event {
         Event::Html(_) | Event::InlineHtml(_) => None,
         Event::Start(Tag::Paragraph) | Event::End(TagEnd::Paragraph) => None,
@@ -200,17 +201,20 @@ pub fn render_inline_markdown(text: &str) -> String {
             None
         }
         // Images take the same gate as links: https or same-origin
-        // only - no data:, no plain http.
+        // only - no data:, no plain http. Unlike a dropped link (whose
+        // label is real text worth keeping), a dropped image's alt
+        // text is a caption for something that isn't there - swallow it.
         Event::Start(Tag::Image { dest_url, .. })
             if !(dest_url.starts_with("https://") || dest_url.starts_with('/')) =>
         {
-            in_link += 1;
+            in_dropped_image += 1;
             None
         }
-        Event::End(TagEnd::Image) if in_link > 0 => {
-            in_link -= 1;
+        Event::End(TagEnd::Image) if in_dropped_image > 0 => {
+            in_dropped_image -= 1;
             None
         }
+        Event::Text(_) if in_dropped_image > 0 => None,
         other => Some(other),
     });
     let mut out = String::new();
@@ -518,6 +522,11 @@ pub struct SiteConfig {
     /// intrinsic pixel height.
     #[serde(default)]
     pub wordmark_height: Option<f32>,
+    /// BCP 47-ish language code for the portal's own chrome strings
+    /// ("Asked by", the nav lead...) and the html lang attribute.
+    /// `None` means "en"; unknown codes fall back to English per key.
+    #[serde(default)]
+    pub lang: Option<String>,
     #[serde(default)]
     pub hero: HeroConfig,
 }