first commit

screens/screens_repo/move_screen.py

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+import db
+
+from .list_screens import list_screens
+
+
+def move_screen(slug, screen_id, direction):
+    """direction: -1 (monter, l'écran devient plus tôt dans l'enchaînement)
+    ou +1 (descendre) — échange l'order_index avec l'écran voisin."""
+    screens_ = list_screens(slug)
+    idx = next((i for i, s in enumerate(screens_) if s["id"] == screen_id), None)
+    if idx is None:
+        return
+    swap_idx = idx + direction
+    if swap_idx < 0 or swap_idx >= len(screens_):
+        return
+    a, b = screens_[idx], screens_[swap_idx]
+    conn = db.connect(slug)
+    conn.execute("UPDATE _screens SET order_index = ? WHERE id = ?", (b["order_index"], a["id"]))
+    conn.execute("UPDATE _screens SET order_index = ? WHERE id = ?", (a["order_index"], b["id"]))
+    conn.commit()
+    conn.close()