feat(rename): complete searchSpace to workspace transition across frontend and backend

- Introduced a comprehensive specification for renaming `searchSpace` to `workspace` in `surfsense_web` and `surfsense_desktop`, ensuring all TypeScript identifiers, React props, and local data structures are updated.
- Implemented migration shims for persisted local state to prevent data loss during the transition.
- Updated observability metrics and IPC channels to reflect the new naming convention.
- Removed legacy `active-search-space` module and replaced it with `active-workspace` to maintain consistency.
- Ensured no behavioral changes or data loss for users during the renaming process.

surfsense_web/tests/helpers/api/workspaces.ts

@@ -1,29 +1,29 @@
 import type { APIRequestContext } from "@playwright/test";
 import { authHeaders, BACKEND_URL } from "./auth";
 
-export type SearchSpaceRow = {
+export type WorkspaceRow = {
 	id: number;
 	name: string;
 	description: string | null;
 };
 
-export async function createSearchSpace(
+export async function createWorkspace(
 	request: APIRequestContext,
 	token: string,
 	name: string,
-	description = "E2E test search space"
-): Promise<SearchSpaceRow> {
+	description = "E2E test workspace"
+): Promise<WorkspaceRow> {
 	const response = await request.post(`${BACKEND_URL}/api/v1/workspaces`, {
 		headers: authHeaders(token),
 		data: { name, description },
 	});
 	if (!response.ok()) {
-		throw new Error(`createSearchSpace failed (${response.status()}): ${await response.text()}`);
+		throw new Error(`createWorkspace failed (${response.status()}): ${await response.text()}`);
 	}
-	return (await response.json()) as SearchSpaceRow;
+	return (await response.json()) as WorkspaceRow;
 }
 
-export async function deleteSearchSpace(
+export async function deleteWorkspace(
 	request: APIRequestContext,
 	token: string,
 	id: number
@@ -34,7 +34,7 @@ export async function deleteSearchSpace(
 	if (!response.ok() && response.status() !== 404) {
 		// 404 is acceptable: the test may have already deleted the space.
 		throw new Error(
-			`deleteSearchSpace(${id}) failed (${response.status()}): ${await response.text()}`
+			`deleteWorkspace(${id}) failed (${response.status()}): ${await response.text()}`
 		);
 	}
 }