Pre-launch design sync with Figma spec (#2154)

* Add lookbook + viewcomponent, organize design system file

* Build menu component

* Button updates

* More button fixes

* Replace all menus with new ViewComponent

* Checkpoint: fix tests, all buttons and menus converted

* Split into Link and Button components for clarity

* Button cleanup

* Simplify custom confirmation configuration in views

* Finalize button, link component API

* Add toggle field to custom form builder + Component

* Basic tabs component

* Custom tabs, convert all menu / tab instances in app

* Gem updates

* Centralized icon helper

* Update all icon usage to central helper

* Lint fixes

* Centralize all disclosure instances

* Dialog replacements

* Consolidation of all dialog styles

* Test fixes

* Fix app layout issues, move to component with slots

* Layout simplification

* Flakey test fix

* Fix dashboard mobile issues

* Finalize homepage

* Lint fixes

* Fix shadows and borders in dark mode

* Fix tests

* Remove stale class

* Fix filled icon logic

* Move transparent? to public interface

app/javascript/controllers/confirm_dialog_controller.js

@@ -0,0 +1,59 @@
+import { Controller } from "@hotwired/stimulus";
+
+// Connects to data-controller="confirm-dialog"
+// See javascript/controllers/application.js for how this is wired up
+export default class extends Controller {
+  static targets = ["title", "subtitle", "confirmButton"];
+
+  handleConfirm(rawData) {
+    const data = this.#normalizeRawData(rawData);
+
+    this.#prepareDialog(data);
+
+    this.element.showModal();
+
+    return new Promise((resolve) => {
+      this.element.addEventListener(
+        "close",
+        () => {
+          const isConfirmed = this.element.returnValue === "confirm";
+          resolve(isConfirmed);
+        },
+        { once: true },
+      );
+    });
+  }
+
+  #prepareDialog(data) {
+    const variant = data.variant || "primary";
+
+    this.confirmButtonTargets.forEach((button) => {
+      if (button.dataset.variant === variant) {
+        button.removeAttribute("hidden");
+      } else {
+        button.setAttribute("hidden", true);
+      }
+
+      button.textContent = data.confirmText || "Confirm";
+    });
+
+    this.titleTarget.textContent = data.title || "Are you sure?";
+    this.subtitleTarget.innerHTML =
+      data.body || "This action cannot be undone.";
+  }
+
+  // If data is a string, it's the title.  Otherwise, return the parsed object.
+  #normalizeRawData(rawData) {
+    try {
+      const parsed = JSON.parse(rawData);
+
+      if (typeof parsed === "boolean") {
+        return { title: "Are you sure?" };
+      }
+
+      return parsed;
+    } catch (e) {
+      return { title: rawData };
+    }
+  }
+}