Fix saccades LV + distorsion pellicule + draw_capture plein ecran

- Supprime sleep(0.3) apres chaque capture_preview() reussi
  (limitait le live view a ~3fps, cause principale des saccades)
- Fixe crash silencieux thread camera : _nb_retry non initialise
  pour errs 1-4 (NameError) -> restructure en for/else propre
- Pellicule live view : _pfit() au lieu de transform.scale() -> plus de distorsion
- draw_capture() : mode pellicule affiché au lieu de fullscreen black

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

photobooth_pygame.py

@@ -828,9 +828,7 @@ class PB:
                             if self.cam: self.cam.exit()
                         except: pass
                         self.cam = None; errs = 0
-                        _nb_retry = 0
-                    while _nb_retry < 10:
-                        _nb_retry += 1
+                        for _nb_retry in range(10):
                             time.sleep(3)
                             _usb_reset_done()
                             try:
@@ -839,14 +837,13 @@ class PB:
                                 print("Caméra reconnectée automatiquement")
                                 break
                             except Exception as re:
-                            print(f"Reconnexion échouée ({_nb_retry}): {re}")
+                                print(f"Reconnexion échouée ({_nb_retry+1}): {re}")
                         else:
                             # 10 tentatives échouées → bascule en simulation
                             self.sim = True
                             print("Caméra introuvable → mode simulation")
-                    errs = 0
                     else:
-                        time.sleep(0.3)
+                        time.sleep(0.1)
             else:
                 time.sleep(0.05)
 
@@ -1249,7 +1246,7 @@ class PB:
                 else:
                     with self.flock:
                         if self.frame:
-                            lv = pygame.transform.scale(self.frame, (fw, fh))
+                            lv = _pfit(self.frame, fw, fh)
                             self.scr.blit(lv, (fx, fy))
                         else:
                             pygame.draw.rect(self.scr, (25, 25, 25), (fx, fy, fw, fh))
@@ -1354,6 +1351,10 @@ class PB:
             self.scr.blit(info,(W//2-info.get_width()//2,H-90))
 
     def draw_capture(self):
+        if self._is_pell():
+            self._draw_pellicule(show_live=False)
+            self._overlay(70)
+        else:
             self._lv(); self._overlay(90)
         s=self._txt("Prise de vue...","md"); self._c(s,H//2-s.get_height()//2)