Update requirement files with new feature templates and fix backend API error message, along with mobile project config updates and documentation improvements

03_source/mobile/src/pages/Tutorial.scss

@@ -0,0 +1,56 @@
+#tutorial-page {
+  ion-toolbar {
+    --background: transparent;
+    --border-color: transparent;
+  }
+
+  .slide-title {
+    margin-top: 2.8rem;
+  }
+
+  .slider {
+    display: grid;
+    grid-template-columns: repeat(4, 100%);
+    grid-template-rows: 1fr;
+
+    height: 100%;
+
+    overflow: scroll;
+    scroll-snap-type: x mandatory;
+  }
+
+  section {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    text-align: center;
+
+    width: 100%;
+
+    scroll-snap-align: center;
+    scroll-snap-stop: always;
+  }
+
+  .slide-image {
+    max-height: 50%;
+    max-width: 60%;
+    margin: -5vh 0 0;
+    pointer-events: none;
+  }
+
+  b {
+    font-weight: 500;
+  }
+
+  p {
+    padding: 0 40px;
+    font-size: 14px;
+    line-height: 1.5;
+    color: var(--ion-color-step-600, #60646b);
+
+    b {
+      color: var(--ion-text-color, #000000);
+    }
+  }
+}