V3.6.0 — Demonter pages, masquage visuel, regles, bleeds, corrections

- Demonter les pages : couper en 2 sans reordonner (sous Delivretiser)
- Masquage visuel : selection au curseur sur l'apercu + plage de pages
- Regles horizontale/verticale en mm (menu Affichage)
- Fonds perdus : filigrane rouge pour visualiser les bleeds
- Reperes de coupe : marques a l'exterieur (page agrandie), 2 traits/coin
- Numerotation : couleur configurable via selecteur
- Decalage : Trim & Shift renomme en francais, creep -> chasse
- Recadrages multiples cumulatifs (plages differentes)
- Fix spinbox format personnalise (fleches aleatoires)
- Fix combo livret : option Automatique preservee

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

app/engine/crop.py

@@ -5,36 +5,50 @@ from .pdf_utils import get_page_size
 
 
 def crop_pages(input_path, output_path, crop_top=0, crop_bottom=0,
-               crop_left=0, crop_right=0, pages=None):
+               crop_left=0, crop_right=0, pages=None, per_page_settings=None):
     """Recadrer les pages specifiees.
 
     crop_top/bottom/left/right : en points, quantite a retirer de chaque cote
     pages : liste d'indices (0-based) des pages a recadrer. None = toutes.
+    per_page_settings : dict {page_index: {"crop_top", "crop_bottom", "crop_left", "crop_right"}}
+                        Si fourni, applique des reglages differents par page.
     """
     reader = PdfReader(input_path)
     writer = PdfWriter()
 
-    if pages is None:
+    if pages is None and per_page_settings is None:
         pages = list(range(len(reader.pages)))
 
     for i, page in enumerate(reader.pages):
-        if i in pages:
-            w, h = get_page_size(page)
-            new_left = float(page.mediabox.left) + crop_left
-            new_bottom = float(page.mediabox.bottom) + crop_bottom
-            new_right = float(page.mediabox.right) - crop_right
-            new_top = float(page.mediabox.top) - crop_top
+        # Verifier si on a des reglages specifiques pour cette page
+        if per_page_settings and i in per_page_settings:
+            ps = per_page_settings[i]
+            ct = ps.get("crop_top", 0)
+            cb = ps.get("crop_bottom", 0)
+            cl = ps.get("crop_left", 0)
+            cr = ps.get("crop_right", 0)
+        elif pages is not None and i in pages:
+            ct, cb, cl, cr = crop_top, crop_bottom, crop_left, crop_right
+        else:
+            writer.add_page(page)
+            continue
 
-            # Securite
-            if new_right <= new_left or new_top <= new_bottom:
-                writer.add_page(page)
-                continue
+        w, h = get_page_size(page)
+        new_left = float(page.mediabox.left) + cl
+        new_bottom = float(page.mediabox.bottom) + cb
+        new_right = float(page.mediabox.right) - cr
+        new_top = float(page.mediabox.top) - ct
 
-            page.mediabox.lower_left = (new_left, new_bottom)
-            page.mediabox.upper_right = (new_right, new_top)
-            page.cropbox = page.mediabox
-            if hasattr(page, 'trimbox'):
-                page.trimbox = page.mediabox
+        # Securite
+        if new_right <= new_left or new_top <= new_bottom:
+            writer.add_page(page)
+            continue
+
+        page.mediabox.lower_left = (new_left, new_bottom)
+        page.mediabox.upper_right = (new_right, new_top)
+        page.cropbox = page.mediabox
+        if hasattr(page, 'trimbox'):
+            page.trimbox = page.mediabox
 
         writer.add_page(page)