fix: figcaption dans figure, loop swiper, max-height images investigation

- investigation.php : figcaption déplacé à l'intérieur des <figure>
  (correction HTML + meilleure capture par la lightbox)
- swipers.js : loop: true sur toutes les galeries
- _investigation_content.scss : max-height 75vh sur les images
- _figures.scss : reformatage indentation

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

assets/css/components/_figures.scss

@@ -1,26 +1,23 @@
-
-@mixin figure-16-9{ 
-    & > figure{
-        aspect-ratio: 16/9;
-        display: flex;
-        overflow: hidden;
-        img, picture{
-            width: 100%;
-            height: 100%;
-            object-fit: cover;
-            transition: cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.5s;
-
-        }
+@mixin figure-16-9 {
+  & > figure {
+    aspect-ratio: 16/9;
+    display: flex;
+    overflow: hidden;
+    img,
+    picture {
+      width: 100%;
+      height: 100%;
+      object-fit: cover;
+      transition: cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.5s;
     }
+  }
 }
 
-
-  figcaption, .caption{
-        font-size: var(--fs-small);
-        color: var(--color-txt-light);
-        font-weight: 500;
-        line-height: 1.1;
-        margin: calc(var(--spacing) * 0.5) 0!important;
-    }
-
-
+figcaption,
+.caption {
+  font-size: var(--fs-small) !important;
+  color: var(--color-txt-light);
+  font-weight: 500;
+  line-height: 1.1;
+  margin: calc(var(--spacing) * 0.5) 0 !important;
+}