diff --git a/CHANGELOG.md b/CHANGELOG.md
index c91d50e..9c9dd40 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog - FlowDeck
 
+## v7.59.3 (2026-10-07) — Correction : « Turn into » du menu contextuel
+
+### Fixed
+
+- **« Turn into… » ne faisait rien** — la garde validait le type avec
+  `_BLOCK_TURN_TYPES.indexOf(type)` alors que ce tableau contient des **objets**
+  `{id, name}` : `indexOf` d'une chaîne renvoyait toujours `-1` → `turnInto()`
+  retournait immédiatement après l'ouverture du sous-menu. Correction :
+  `_BLOCK_TURN_TYPES.some(t=>t.id===type)`.
+- **Texte conservé** — convertir un bloc en **To-do** ou **Toggle** vidait le
+  contenu (ces deux types étaient exclus de la conservation par erreur) ; seul
+  un type sans champ texte (`image`, `embed`, `divider`, `button`, `columns`,
+  …) le vide désormais, comme dans `Notion`.
+- **Tests** — `tests/test_v7593_turn_into.py` : **4 tests**, dont 1
+  comportemental **node** qui exécute la vraie `turnInto()` extraite de la
+  source : conversion effective du type, texte conservé (To-do = étiquette +
+  case décochée), contenu vidé pour un type sans champ texte.
+
 ## v7.59.2 (2026-10-07) — Corrections : aide, « Insert below », listes numérotées
 
 ### Fixed
diff --git a/VERSION b/VERSION
index f06905a..30e0d31 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-7.59.2
+7.59.3
diff --git a/app/main.py b/app/main.py
index c9340e8..c1841fe 100644
--- a/app/main.py
+++ b/app/main.py
@@ -186,7 +186,7 @@ async def lifespan(_app: FastAPI):
 
 app = FastAPI(
     title="FlowDeck",
-    version="7.59.2",
+    version="7.59.3",
     docs_url="/docs",
     redoc_url="/redoc",
     lifespan=lifespan,
diff --git a/docs/openapi-v2.json b/docs/openapi-v2.json
index 5c617ba..fa08625 100644
--- a/docs/openapi-v2.json
+++ b/docs/openapi-v2.json
@@ -2,7 +2,7 @@
   "openapi": "3.1.0",
   "info": {
     "title": "FlowDeck",
-    "version": "7.59.2"
+    "version": "7.59.3"
   },
   "paths": {
     "/auth/register": {
diff --git a/static/js/page_editor_scripts.js b/static/js/page_editor_scripts.js
index 837e915..8eafe00 100644
--- a/static/js/page_editor_scripts.js
+++ b/static/js/page_editor_scripts.js
@@ -1523,7 +1523,7 @@ replaceBlock(idx,type){const b=this.blocks[idx];if(!b)return;this.sync();this.pu
 
         // ── v5.10.0: Turn into / couleurs / liens / déplacement ──
         _blockTargets(idx){const sel=_selIndicesSorted();return(sel.includes(idx))?sel:[idx];},
-        turnInto(idx,type){if(idx<0||idx>=this.blocks.length)return;if(_BLOCK_TURN_TYPES.indexOf(type)<0)return;const targets=this._blockTargets(idx);const focusId=this.blocks[idx].id;this.sync();this.pushHistory();targets.forEach(i=>{const b=this.blocks[i];if(!b)return;if(b.type===type)return;const keep=(b.content||'').trim();b.type=type;if(type!=='to_do'&&type!=='toggle'&&keep&&['image','embed','meeting','divider','table_of_contents','database','button','columns'].indexOf(b.type)<0){b.content=keep;}else{b.content='';}if(type==='toggle'){b.expanded=true;if(!Array.isArray(b.children))b.children=[];}if(type==='to_do')b.checked=false;if(type==='table'&&!Array.isArray(b.rows))b.rows=_tblNew(3,3);if(type==='code'&&!b.language)b.language='Plain Text';if(type==='columns'&&(!Array.isArray(b.children)||!b.children.length))b.children=[{id:genId(),type:'paragraph',content:''}];if(type==='button'){b.automation_id=0;b.automation_name='';}});
+        turnInto(idx,type){if(idx<0||idx>=this.blocks.length)return;if(!_BLOCK_TURN_TYPES.some(t=>t.id===type))return;const targets=this._blockTargets(idx);const focusId=this.blocks[idx].id;this.sync();this.pushHistory();targets.forEach(i=>{const b=this.blocks[i];if(!b)return;if(b.type===type)return;const keep=(b.content||'').trim();b.type=type;if(keep&&['image','embed','meeting','divider','table_of_contents','database','button','columns'].indexOf(b.type)<0){b.content=keep;}else{b.content='';}if(type==='toggle'){b.expanded=true;if(!Array.isArray(b.children))b.children=[];}if(type==='to_do')b.checked=false;if(type==='table'&&!Array.isArray(b.rows))b.rows=_tblNew(3,3);if(type==='code'&&!b.language)b.language='Plain Text';if(type==='columns'&&(!Array.isArray(b.children)||!b.children.length))b.children=[{id:genId(),type:'paragraph',content:''}];if(type==='button'){b.automation_id=0;b.automation_name='';}});
           this.dirty=true;this.autoSave();this.render();_rtSync();_selClear();
           setTimeout(()=>{const bid=this.blocks[idx]?this.blocks[idx].id:focusId;if(type==='table'){_tblFocus(bid,0,0);}else{const el=this.getEl(bid);if(el){el.focus();ce(el);}}},60);},
         setBlockColor(idx,key,val){if(idx<0||idx>=this.blocks.length)return;const targets=this._blockTargets(idx);const v=(!val||val==='default')?null:val;this.sync();this.pushHistory();targets.forEach(i=>{const b=this.blocks[i];if(!b)return;if(!b.style)b.style={};if(v==null)delete b.style[key];else b.style[key]=v;});this.dirty=true;this.autoSave();this.render();_rtSync();_selClear();},
diff --git a/tests/test_v7593_turn_into.py b/tests/test_v7593_turn_into.py
new file mode 100644
index 0000000..389993d
--- /dev/null
+++ b/tests/test_v7593_turn_into.py
@@ -0,0 +1,82 @@
+"""7.59.3 — « Turn into » du menu contextuel : garde cassée + texte conservé."""
+
+import json
+import shutil
+import subprocess
+from pathlib import Path
+
+import pytest
+
+ROOT = Path(__file__).resolve().parent.parent
+EDITOR_JS = ROOT / "static" / "js" / "page_editor_scripts.js"
+SRC = EDITOR_JS.read_text(encoding="utf-8")
+
+
+def _slice(start: str, end: str) -> str:
+    i = SRC.index(start)
+    j = SRC.index(end, i)
+    return SRC[i:j].rstrip()
+
+
+def test_turn_into_guard_matches_objects_not_strings():
+    # BUG : indexOf() sur un tableau d'objets → toujours -1 → retour immédiat.
+    assert "_BLOCK_TURN_TYPES.indexOf(type)" not in SRC
+    assert "_BLOCK_TURN_TYPES.some(t=>t.id===type)" in SRC
+
+
+def test_turn_into_menu_wiring():
+    # menu ⋮⋮ → « Turn into » → sous-menu → choix de type
+    assert 'data-bm-act="turn"' in SRC
+    assert "data-bm-act=\\\"turn-type\\\"" in SRC or 'data-bm-act="turn-type"' in SRC
+    assert "act==='turn-type'" in SRC
+    assert "_blockTurnMenuOpen(" in SRC
+
+
+def test_turn_into_keeps_text_for_to_do_and_toggle():
+    # Convertir un texte en To-do / Toggle ne doit plus effacer le contenu.
+    line = [ln for ln in SRC.splitlines()
+            if ln.strip().startswith("turnInto(idx,type){")][0]
+    assert "type!=='to_do'&&type!=='toggle'" not in line
+    assert "if(keep&&['image','embed','meeting','divider'" in line
+
+
+# ── Comportement réel : la méthode extraite de la source, exécutée sous node ─
+
+def test_turn_into_converts_blocks_for_real():
+    node = shutil.which("node")
+    if not node:
+        pytest.skip("node absent : test comportemental turnInto ignoré")
+    types = _slice("const _BLOCK_TURN_TYPES=[", "];")
+    method = _slice("turnInto(idx,type){", "setBlockColor(idx,key,val){")
+    script = f"""
+function _rtSync(){{}}
+function _selClear(){{}}
+{types}];
+const E = {{
+  blocks: [{{id:'b1',type:'paragraph',content:'Bonjour'}}],
+  _blockTargets(i){{return [i];}},
+  sync(){{}}, pushHistory(){{}}, dirty:false,
+  autoSave(){{}}, render(){{}}, getEl(){{return null;}},
+  {method}
+}};
+E.turnInto(0,'heading_2');
+const heading = {{type:E.blocks[0].type, content:E.blocks[0].content}};
+E.turnInto(0,'to_do');
+const to_do = {{type:E.blocks[0].type, content:E.blocks[0].content, checked:E.blocks[0].checked}};
+E.turnInto(0,'button');   // type sans texte → contenu vidé
+const button = {{type:E.blocks[0].type, content:E.blocks[0].content}};
+console.log(JSON.stringify({{heading:heading, to_do:to_do, button:button}}));
+"""
+    out = subprocess.run([node, "-e", script], capture_output=True, text=True,
+                         timeout=30, encoding="utf-8")
+    assert out.returncode == 0, out.stderr
+    res = json.loads(out.stdout)
+
+    # 1) le changement de format a lieu (avant la correction : aucune conversion)
+    assert res["heading"] == {"type": "heading_2", "content": "Bonjour"}
+
+    # 2) To-do : texte conservé comme étiquette, case décochée
+    assert res["to_do"] == {"type": "to_do", "content": "Bonjour", "checked": False}
+
+    # 3) Button (type sans texte) → contenu vidé
+    assert res["button"] == {"type": "button", "content": ""}