Change la couleur des noeuds (black comme pour les dispositifs) et ajuste les flèches

src/lib/components/scholar_waterfalls/ScholarWaterfall.svelte

@@ -294,31 +294,36 @@
                     class="text-le-gris-dispositif-dark hover:text-black"
                     on:click={() => zoomOut(decomposition.parentName)}
                   >
-                    <!--Material Icon Expand less-->
+                    <!--Material Icon Expand Less-->
                     <svg
-                      class="fill-current h-4 w-4"
+                      class="fill-current h-5 w-5 pr-1"
                       xmlns="http://www.w3.org/2000/svg"
-                      viewBox="0 0 18 18"
-                      ><path d="M0 0h24v24H0z" fill="none" /><path
-                        d="M12 8l-6 6 1.41 1.41L12 10.83l4.59 4.58L18 14z"
-                      /></svg
+                      viewBox="0 0 22 18"
+                      fill="#000000"
                     >
+                      <path d="M0 0h18v18H0z" fill="none" /><path
+                        d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"
+                      />
+                    </svg>
                   </button>
                 {/if}
                 {#if (!decomposition.open && decomposition.childrenName !== undefined) || decomposition.previousChildStack !== undefined}
                   <button
-                    class=" h-2 w-2 hover:text-black text-le-gris-dispositif-dark  "
+                    class="hover:text-black text-le-gris-dispositif-dark"
                     on:click={() => zoomIn(decomposition.name)}
                   >
-                    <!--Material Navigate Next-->
+                    <!--Material Icon Navigate Next -->
                     <svg
-                      class="fill-current"
+                      class="fill-current h-5 w-5 pr-1"
                       xmlns="http://www.w3.org/2000/svg"
-                      viewBox="0 0 18 18"
-                      ><path d="M0 0h24v24H0z" fill="none" /><path
-                        d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"
-                      /></svg
+                      viewBox="0 0 22 18"
+                      fill="#000000"
                     >
+                      <path d="M0 0h18v18H0z" fill="none" />
+                      <path
+                        d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"
+                      />
+                    </svg>
                   </button>
                 {/if}
               {:else}
@@ -394,7 +399,7 @@
                   <!-- Noeud intermédiaire, mais ne faisant pas partie du tronc-->
                   {#if decomposition.open}
                     <button
-                      class="text-le-gris-dispositif-dark p-0 "
+                      class="text-black p-0 "
                       on:click={() => zoomOut(decomposition.name)}
                     >
                       <!--Material Icon Expand Less-->
@@ -411,14 +416,14 @@
                     </button>
                   {:else}
                     <button
-                      class="text-le-gris-dispositif-dark p-0"
+                      class="text-black p-0"
                       on:click={() => zoomIn(decomposition.name)}
                     >
                       <!--Material Icon Navigate Next -->
                       <svg
                         class="fill-current h-5 w-5 pr-1"
                         xmlns="http://www.w3.org/2000/svg"
-                        viewBox="0 0 18 18"
+                        viewBox="0 0 22 18"
                         fill="#000000"
                       >
                         <path d="M0 0h18v18H0z" fill="none" />
@@ -430,7 +435,7 @@
                   {/if}
 
                   <div
-                    class="hover:bg-white cursor-pointer hover:font-bold font-serif overflow-ellipsis overflow-x-hidden hover:overflow-x-visible text-le-gris-dispositif text-base hover:underline hover:z-20"
+                    class="hover:bg-white cursor-pointer font-serif overflow-ellipsis overflow-x-hidden hover:overflow-x-visible text-black hover:text-black text-base hover:underline hover:z-20"
                     on:click={() => {
                       if (decomposition.open) {
                         zoomOut(decomposition.name)