feat: mobile edit-as-default with sticky save/delete actions

- Update MobileEditView to render Save and optional Delete in a
  sticky bottom action bar; header now shows Cancel + title only.
- Make ConfigProfilesMobileView open edit view on profile tap.
- Make ToolWorkshopMobileView open edit view on tool type tap.
- Wire delete into MobileEditView for existing profiles and tool
  types.
- Stay on edit view after saving an existing item; create flow
  returns to list as before.
- Update ToolWorkshopPage cancel to return to list.
- Add mobile-edit-actions and mobile-edit-delete CSS.

Quality gates: npm run typecheck, npm run lint, npm test -- --run (87 passed)

Refs: openspec/changes/mobile-edit-default-bottom-actions

apps/web/src/styles/utilities.css

@@ -2138,7 +2138,8 @@ a.nav-item,
 }
 
 .mobile-edit-cancel,
-.mobile-edit-save {
+.mobile-edit-save,
+.mobile-edit-delete {
 	min-height: 44px;
 	padding: var(--space-2) var(--space-3);
 	border-radius: 10px;
@@ -2159,8 +2160,15 @@ a.nav-item,
 	color: white;
 }
 
+.mobile-edit-delete {
+	background: var(--danger-light);
+	border: 1px solid var(--danger);
+	color: var(--danger);
+}
+
 .mobile-edit-save:disabled,
-.mobile-edit-cancel:disabled {
+.mobile-edit-cancel:disabled,
+.mobile-edit-delete:disabled {
 	opacity: 0.6;
 	cursor: not-allowed;
 }
@@ -2180,7 +2188,31 @@ a.nav-item,
 	flex: 1;
 	overflow-y: auto;
 	padding: var(--space-3);
-	padding-bottom: calc(var(--space-4) + 64px);
+	padding-bottom: calc(var(--space-3) + 148px);
+}
+
+/* Mobile Edit Actions (sticky bottom bar) */
+.mobile-edit-actions {
+	position: fixed;
+	left: 0;
+	right: 0;
+	bottom: 0;
+	z-index: 20;
+	display: flex;
+	flex-direction: column;
+	gap: var(--space-2);
+	padding: var(--space-3);
+	padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
+	background: var(--panel);
+	border-top: 1px solid var(--border);
+	box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
+}
+
+.mobile-edit-actions .mobile-edit-save,
+.mobile-edit-actions .mobile-edit-delete {
+	width: 100%;
+	justify-content: center;
+	min-height: 48px;
 }
 
 .mobile-edit-field {