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/components/features/config-profiles/ConfigProfilesMobileView.tsx

@@ -113,7 +113,7 @@ export const ConfigProfilesMobileView = ({
 		try {
 			const ok = await onSubmit();
 			if (ok) {
-				onViewChange(isCreating ? "list" : "detail");
+				onViewChange(isCreating ? "list" : "edit");
 			}
 		} finally {
 			setIsSaving(false);
@@ -150,7 +150,7 @@ export const ConfigProfilesMobileView = ({
 						const profile = profiles.find((p) => p.id === id);
 						if (profile) {
 							onSelect(profile);
-							onViewChange("detail");
+							onViewChange("edit");
 						}
 					}}
 					onItemDelete={(id: string) => onDelete(id)}
@@ -395,9 +395,11 @@ export const ConfigProfilesMobileView = ({
 			<MobileEditView
 				title={isCreating ? "Create Profile" : "Edit Profile"}
 				onCancel={() => {
-					onViewChange(isCreating ? "list" : "detail");
+					onViewChange("list");
 				}}
 				onSave={handleSave}
+				onDelete={isCreating ? undefined : handleDeleteClick}
+				deleteLabel="Delete Profile"
 				isSaving={isSaving || saveStatus === "saving"}
 			>
 				<div className="mobile-form-group">
@@ -793,7 +795,7 @@ export const ConfigProfilesMobileView = ({
 					const profile = profiles.find((p) => p.id === id);
 					if (profile) {
 						onSelect(profile);
-						onViewChange("detail");
+						onViewChange("edit");
 					}
 				}}
 				onItemDelete={(id: string) => onDelete(id)}