Fix translation issue template to support URL pre-fill

- Change locale and area fields from dropdown to input type
  (GitHub only supports pre-filling input/textarea via URL params)
- Simplify pre-filled URL values for locale and area fields

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: brunoborges

.github/ISSUE_TEMPLATE/translation-issue.yml

@@ -12,31 +12,21 @@ body:
         Found a mistranslation, awkward phrasing, or missing translation?
         Let us know and we'll fix it.
 
-  - type: dropdown
+  - type: input
     id: locale
     attributes:
       label: Language
-      description: "Which language has the issue?"
-      options:
-        - de — Deutsch
-        - es — Español
-        - pt-BR — Português (Brasil)
-        - zh-CN — 中文 (简体)
-        - ar — العربية
-        - fr — Français
-        - ja — 日本語
-        - ko — 한국어
+      description: "Which language has the issue? (e.g. de, es, pt-BR, zh-CN, ar, fr, ja, ko)"
+      placeholder: "pt-BR"
     validations:
       required: true
 
-  - type: dropdown
+  - type: input
     id: area
     attributes:
       label: What is affected?
-      description: "Is this about a pattern page or the site UI (nav, buttons, labels)?"
-      options:
-        - Pattern content (title, summary, explanation, etc.)
-        - UI strings (navigation, buttons, labels, footer)
+      description: "Pattern content or UI strings (navigation, buttons, labels, footer)?"
+      placeholder: "Pattern content"
     validations:
       required: true
 

html-generators/generate.java

@@ -427,8 +427,13 @@ Map<String, String> buildContributeUrls(Snippet s, String locale, String localeN
     var codeBody = urlEncode("**Pattern:** %s\n**URL:** %s\n\nDescribe the issue:\n".formatted(s.slug(), pageUrl));
     var codeUrl = "%s?title=%s&labels=%s&body=%s".formatted(GITHUB_ISSUES_URL, codeTitle, "bug", codeBody);
 
-    var transUrl = "%s?template=translation-issue.yml&title=%s".formatted(
-            GITHUB_ISSUES_URL, urlEncode("[Translation] %s (%s)".formatted(s.title(), localeName)));
+    var cleanLocaleName = localeName.replaceFirst("^[^\\p{L}]+", "");
+    var transUrl = "%s?template=translation-issue.yml&title=%s&locale=%s&pattern=%s&area=%s".formatted(
+            GITHUB_ISSUES_URL,
+            urlEncode("[Translation] %s (%s)".formatted(s.title(), cleanLocaleName)),
+            urlEncode(locale),
+            urlEncode(s.slug()),
+            urlEncode("Pattern content"));
 
     var suggestUrl = "%s?template=new-pattern.yml".formatted(GITHUB_ISSUES_URL);