feat: Adds api route tests. Tested user interface works as expected, still needs some work on vendors form.

Sources/App/Views/Vendors/VendorDetail.swift

@@ -26,15 +26,15 @@ struct VendorDetail: HTML {
 
   // TODO: What route for here??
   var branchForm: some HTML {
-    // TODO: Add hidden input field with vendor id.
     form(
-      .id("branch-form"),
-      .hx.post("/vendors/\(vendor.id)/branches"),
+      .id(.branch(.form)),
+      .hx.post("/vendors/branches"),
       .hx.target("#branches"),
       .hx.swap(.beforeEnd),
       .hx.on(.afterRequest, .ifSuccessful(.resetForm))
       // .custom(name: "hx-on::after-request", value: "if(event.detail.successful) this.reset();")
     ) {
+      input(.type(.hidden), .name("vendorID"), .value(vendor.id.uuidString))
       input(
         .type(.text), .class("col-9"), .name("name"), .placeholder("Add branch..."), .required,
         // FIX: route