i18n slice 1 (A.2-A.4, A.6): narrowed English mask, marker coverage test, English retrieval stems, parse timing

Five v0.247.0 fixtures re-captured from UNCONVERTED v0.246.0 (89dd3e94) because their
one-word Hungarian data values had to become multi-word; two new cases (backups_tier_due,
app_info_installable) captured the same way — the coverage test found both gaps.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/testdata/i18n_parity/app_info_deployed.html

@@ -204,7 +204,7 @@
         
         <div class="stack-meta-badges">
             <span class="meta-badge">~64M RAM</span>
-            <span class="meta-badge">Eszközök</span>
+            <span class="meta-badge">Hasznos eszközök</span>
             <span class="meta-badge meta-badge-warn">HDD szükséges</span>
             <span class="meta-badge meta-badge-warn">Csak x86</span>
             <span class="meta-badge meta-badge-ok">Magyar felület</span>
@@ -231,7 +231,7 @@
         
         <div class="datapath-row">
             <div class="datapath-head">
-                <a href="/files/x" target="_blank" rel="noopener" class="datapath-link">Feltöltések ↗</a>
+                <a href="/files/x" target="_blank" rel="noopener" class="datapath-link">Feltöltött fájlok ↗</a>
                 <span class="datapath-space">12 GB szabad</span>
             </div>
             <p class="datapath-note">Mentve minden éjjel.</p>