Fix: Sidebar scrollable + add Eltern-Portal nav link

overflow-hidden → overflow-y-auto so all nav items are reachable.
Added /parent (Eltern-Portal) link with people icon.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

klausur-service/backend/ocr/gutter/repair.py

@@ -0,0 +1,35 @@
+"""
+Gutter Repair — barrel re-export.
+
+All implementation split into:
+  cv_gutter_repair_core  — spellchecker setup, data types, single-word repair
+  cv_gutter_repair_grid  — grid analysis, suggestion application
+
+Lizenz: Apache 2.0 (kommerziell nutzbar)
+DATENSCHUTZ: Alle Verarbeitung erfolgt lokal.
+"""
+
+# Core: spellchecker, data types, repair helpers
+from cv_gutter_repair_core import (  # noqa: F401
+    _init_spellcheckers,
+    _is_known,
+    _spell_candidates,
+    _MIN_WORD_LEN_SPELL,
+    _MIN_WORD_LEN_HYPHEN,
+    _GUTTER_EDGE_THRESHOLD,
+    _STOPWORDS,
+    _IPA_RE,
+    _is_ipa_text,
+    _word_is_at_gutter_edge,
+    GutterSuggestion,
+    _TRAILING_PUNCT_RE,
+    _try_hyphen_join,
+    _try_spell_fix,
+    _edit_distance,
+)
+
+# Grid: analysis and application
+from cv_gutter_repair_grid import (  # noqa: F401
+    analyse_grid_for_gutter_repair,
+    apply_gutter_suggestions,
+)