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/backups_full.html

@@ -292,7 +292,7 @@
     <table class="backup-tier-table" style="width:100%;margin-top:1rem;border-collapse:collapse">
         
         <tr style="border-top:1px solid var(--border)">
-            <td style="padding:.5rem .75rem .5rem 0;white-space:nowrap;vertical-align:top"><strong>Helyi</strong></td>
+            <td style="padding:.5rem .75rem .5rem 0;white-space:nowrap;vertical-align:top"><strong>Helyi tároló (local)</strong></td>
             <td style="padding:.5rem 0;vertical-align:top">
                 
                     
@@ -307,7 +307,7 @@
         </tr>
         
         <tr style="border-top:1px solid var(--border)">
-            <td style="padding:.5rem .75rem .5rem 0;white-space:nowrap;vertical-align:top"><strong>Távoli</strong></td>
+            <td style="padding:.5rem .75rem .5rem 0;white-space:nowrap;vertical-align:top"><strong>Távoli szerver (PBS)</strong></td>
             <td style="padding:.5rem 0;vertical-align:top">
                 
                     
@@ -319,7 +319,7 @@
         </tr>
         
         <tr style="border-top:1px solid var(--border)">
-            <td style="padding:.5rem .75rem .5rem 0;white-space:nowrap;vertical-align:top"><strong>Harmadik</strong></td>
+            <td style="padding:.5rem .75rem .5rem 0;white-space:nowrap;vertical-align:top"><strong>Harmadik szint</strong></td>
             <td style="padding:.5rem 0;vertical-align:top">
                 
                 <span class="tag"><span class="dot"></span>nincs beállítva</span>