feat(ui): open merge-helper ConPTY tile from selection

src/ClaudeDo.Localization/locales/de.json

@@ -268,6 +268,7 @@
     "overviewMode": "Übersicht",
     "closeSession": "Sitzung schließen",
     "conptyLaunchFailed": "ConPTY-Sitzung konnte nicht geöffnet werden: {0}",
+    "mergeHelperTitle": "Merge-Helfer",
     "submitForReviewFailed": "Einreichen zum Review fehlgeschlagen: {0}",
     "submitForReview": "Zum Review einreichen",
     "submitForReviewTip": "Diesen Worktree committen und den Task ins Review bringen, damit er gemergt werden kann",

src/ClaudeDo.Localization/locales/en.json

@@ -268,6 +268,7 @@
     "overviewMode": "Overview",
     "closeSession": "Close session",
     "conptyLaunchFailed": "Couldn't open ConPTY session: {0}",
+    "mergeHelperTitle": "Merge Helper",
     "submitForReviewFailed": "Couldn't submit for review: {0}",
     "submitForReview": "Submit for review",
     "submitForReviewTip": "Commit this worktree and move the task to review so it can be merged",