Glossar-Review: CO2-Eintrag ganze Sätze + Tabelle, Geviertstrich→Gedankenstrich, Weltküche-Onboarding

- Glossar-Renderer: Markdown-Tabellen (|…|) + .gl-table CSS
- co2-fussabdruck-lebensmittel: telegrafische Liste → ganze Sätze + saubere
  Portions-Tabelle, Avocado-Vergleich, Malpunkt statt ×
- Programmweit „—" (Geviertstrich) → „–" (Gedankenstrich): Glossar-DB,
  glossar_examples, module_info, alle 13 Buch-Kapitel
- Weltküche-Onboarding: Blatt 2 umformuliert (zweites Land nacheinander),
  Blatt 3 Lehrplan-Satz entfernt, Blatt 4 fehlendes markt.webp generiert

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

App/Don_t_Deploy/2026-07-19-geviertstrich-fix.sql

@@ -0,0 +1,17 @@
+-- Geviertstrich „—" (U+2014) → Gedankenstrich „–" (U+2013), programmweit in der DB.
+UPDATE glossar SET
+  short = REPLACE(short, '—', '–'),
+  text = REPLACE(text, '—', '–'),
+  short_easy = REPLACE(short_easy, '—', '–'),
+  text_easy = REPLACE(text_easy, '—', '–');
+UPDATE glossar_examples SET
+  text = REPLACE(text, '—', '–'),
+  text_easy = REPLACE(text_easy, '—', '–');
+UPDATE module_info SET
+  subtitle = REPLACE(subtitle, '—', '–'),
+  short_desc = REPLACE(short_desc, '—', '–'),
+  long_desc = REPLACE(long_desc, '—', '–'),
+  learning_goals = REPLACE(learning_goals, '—', '–'),
+  short_desc_easy = REPLACE(short_desc_easy, '—', '–'),
+  long_desc_easy = REPLACE(long_desc_easy, '—', '–'),
+  learning_goals_easy = REPLACE(learning_goals_easy, '—', '–');