chore(release): v0.2.5 version strings — About surface + package.json

---ci---
phase: 5
milestone: v0.2
status: approval_pending
message: >-
  Release-candidate bookkeeping for the owner-directed v0.2.5
  deploy: package.json and the Settings About surface report
  v0.2.5 MVP release candidate with the live-mode hint. Same
  class of update as the v0.1.8 audit note (About + package.json
  -> release version). Gates green (97/97).
---/ci---

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@researchx/frontend",
-  "version": "0.1.8",
+  "version": "0.2.5",
   "private": true,
   "packageManager": "pnpm@12.6.0",
   "scripts": {

frontend/src/components/settings-view.test.tsx

@@ -107,6 +107,6 @@ describe("SettingsView (REQ-65)", () => {
     expect(screen.getByText("preview", { exact: true })).toBeInTheDocument();
 
     expect(screen.getByText(/About & version|About and version/i)).toBeInTheDocument();
-    expect(screen.getByText(/v0\.1\.8 · prototype/i)).toBeInTheDocument();
+    expect(screen.getByText(/v0\.2\.5 · MVP release candidate/i)).toBeInTheDocument();
   });
 });

frontend/src/components/settings-view.tsx

@@ -244,8 +244,9 @@ export function SettingsView() {
             visited-only citations, three clicks to a trustworthy report.
           </p>
           <p className="mt-2 text-caption text-ink-faint">
-            v0.1.8 · prototype — runs on scripted mock data; the engine,
-            adapters, and trust loop arrive in v0.2.
+            v0.2.5 · MVP release candidate — mock-backed by default; the
+            engine, adapters, and trust loop ship with v0.2 (live mode:
+            NEXT_PUBLIC_RESEARCHX_API_MODE=live).
           </p>
         </section>