Add ability to delete configurations

apps/portal/src/routes/(app)/calculator/+page.svelte

@@ -54,6 +54,7 @@
     let saveError = $state<string | null>(null);
     let saving = $state(false);
     let settingLive = $state(false);
+    let deleting = $state(false);
 
     const allStandards = $derived(
         editor
@@ -229,6 +230,26 @@
         await loadConfig(editor.configId, { skipDirtyCheck: true });
     }
 
+    async function deleteConfig() {
+        if (!editor?.configId || isLive) return;
+        if (!confirm(`Delete "${editor.name || "(untitled)"}"? This cannot be undone.`))
+            return;
+        const configId = editor.configId;
+        saveError = null;
+        deleting = true;
+        try {
+            const res = await api.standards.configs({ id: configId }).delete();
+            if (res.error) throw res.error;
+            localStorage.removeItem(DRAFT_KEY);
+            await refreshLists();
+            if (liveConfigId) await loadConfig(liveConfigId, { skipDirtyCheck: true });
+        } catch (err) {
+            saveError = errorMessage(err);
+        } finally {
+            deleting = false;
+        }
+    }
+
     async function setLive() {
         if (!editor?.configId || isDirty) return;
         const configId = editor.configId;
@@ -346,7 +367,7 @@
             class="btn btn-ghost btn-sm btn-square"
             title="Save as new configuration"
             aria-label="Save as new configuration"
-            disabled={saving}
+            disabled={saving || deleting}
             onclick={promptSaveAsNew}
         >
             <span class="text-lg leading-none">+</span>
@@ -377,7 +398,7 @@
         <button
             class="btn btn-primary btn-sm"
             hidden={isLive && !isDirty}
-            disabled={saving || !isDirty || isLive}
+            disabled={saving || !isDirty || isLive || deleting}
             onclick={save}
         >
             {saving ? "Saving..." : "Save"}
@@ -385,11 +406,34 @@
         <button
             class="btn btn-outline btn-sm"
             hidden={currentEditor.configId === liveConfigId}
-            disabled={settingLive || isDirty}
+            disabled={settingLive || isDirty || deleting}
             onclick={setLive}
         >
             {settingLive ? "Setting live..." : "Set as live"}
         </button>
+
+        <details hidden={isLive} class="dropdown dropdown-end">
+            <summary
+                class="btn btn-ghost btn-sm btn-square list-none"
+                title="More actions"
+                aria-label="More actions"
+            >
+                <span class="text-lg leading-none">⋮</span>
+            </summary>
+            <ul
+                class="dropdown-content menu bg-base-200 border border-base-300 rounded-box z-20 w-40 p-2 shadow-lg mt-2"
+            >
+                <li>
+                    <button
+                        class="text-error"
+                        disabled={deleting || isLive || !currentEditor.configId}
+                        onclick={deleteConfig}
+                    >
+                        {deleting ? "Deleting..." : "Delete"}
+                    </button>
+                </li>
+            </ul>
+        </details>
     </div>
 
     {#if saveError}