Fix export on fresh clone (make import), add elision and duplicate-sentence guards, replace 14 duplicate sentences (0.5.3)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

data/exercises/ce2/ce2_a_a_correction_02.json

@@ -9,11 +9,11 @@
   "instruction": "Touche le mot qui contient une erreur, puis corrige-le.",
   "tokens": [
     {
-      "text": "Nous",
+      "text": "Ils",
       "correct": true
     },
     {
-      "text": "allons",
+      "text": "vont",
       "correct": true
     },
     {
@@ -23,11 +23,7 @@
       "rule_id": "regle_homophone_a_a"
     },
     {
-      "text": "la",
-      "correct": true
-    },
-    {
-      "text": "piscine.",
+      "text": "l'école.",
       "correct": true
     }
   ],

data/exercises/ce2/ce2_a_a_qcm_01.json

@@ -7,7 +7,7 @@
   "difficulty": 1,
   "type": "multiple_choice",
   "instruction": "Choisis le bon mot.",
-  "question": "Léa ... un chat.",
+  "question": "Max ... un vélo.",
   "answers": [
     "a",
     "à"

data/exercises/ce2/ce2_et_est_correction_02.json

@@ -9,7 +9,7 @@
   "instruction": "Touche le mot qui contient une erreur, puis corrige-le.",
   "tokens": [
     {
-      "text": "Paul",
+      "text": "Sarah",
       "correct": true
     },
     {
@@ -19,11 +19,11 @@
       "rule_id": "regle_homophone_et_est"
     },
     {
-      "text": "Marie",
+      "text": "Tom",
       "correct": true
     },
     {
-      "text": "jouent",
+      "text": "dessinent",
       "correct": true
     },
     {

data/exercises/ce2/ce2_et_est_qcm_01.json

@@ -7,7 +7,7 @@
   "difficulty": 1,
   "type": "multiple_choice",
   "instruction": "Choisis le bon mot.",
-  "question": "Le chat ... noir.",
+  "question": "Le ciel ... bleu.",
   "answers": [
     "et",
     "est"

data/exercises/ce2/ce2_on_ont_qcm_01.json

@@ -7,7 +7,7 @@
   "difficulty": 1,
   "type": "multiple_choice",
   "instruction": "Choisis le bon mot.",
-  "question": "... joue dehors.",
+  "question": "... chante une chanson.",
   "answers": [
     "On",
     "Ont"

data/exercises/ce2/ce2_on_ont_qcm_02.json

@@ -7,7 +7,7 @@
   "difficulty": 1,
   "type": "multiple_choice",
   "instruction": "Choisis le bon mot.",
-  "question": "Les enfants ... faim.",
+  "question": "Les oiseaux ... froid.",
   "answers": [
     "on",
     "ont"

data/exercises/ce2/ce2_son_sont_qcm_01.json

@@ -7,7 +7,7 @@
   "difficulty": 1,
   "type": "multiple_choice",
   "instruction": "Choisis le bon mot.",
-  "question": "Les chats ... gentils.",
+  "question": "Les élèves ... contents.",
   "answers": [
     "son",
     "sont"

data/exercises/ce2/ce2_son_sont_qcm_04.json

@@ -7,7 +7,7 @@
   "difficulty": 1,
   "type": "multiple_choice",
   "instruction": "Choisis le bon mot.",
-  "question": "Paul range ... cartable.",
+  "question": "Julie ouvre ... cahier.",
   "answers": [
     "son",
     "sont"