feat: disable submit until valid

src/lib/components/Button.svelte

@@ -27,4 +27,8 @@
     button:focus {
         outline: 2px solid #007bff;
     }
+    button:disabled {
+        background: linear-gradient(-18deg, #66697b, #4e4e5e);
+        cursor: not-allowed;
+    }
 </style>

src/routes/space/+page.svelte

@@ -95,7 +95,15 @@
     />
 
     <div class="submit">
-        <Button type="submit">Share this study space!</Button>
+        <Button
+            type="submit"
+            disabled={(spaceImg?.length || 0) === 0 ||
+                !studySpaceData.location ||
+                !studySpaceData.description ||
+                !studySpaceData.building_location}
+        >
+            Share this study space!
+        </Button>
     </div>
 </form>