fix(client): copies over plain HTTP, Vietnamese IME Enter, stale replies; react-router 7

- Every Copy goes through copyText: on http://<lan-ip> navigator.clipboard
  is undefined, so the push token (shown once), snapshot links, tool paths and
  hosts copied nothing, silently or with a TypeError.
- Inputs that submit on Enter use isSubmitEnter, so committing an IME
  composition (Vietnamese) no longer saves a half-typed pet name, jumps the
  settings search, or submits a cut-off plugin/MCP/marketplace spec.
- LaneChangesPanel, Workspace features/proof and AiToolConfig drop a reply
  that lands after the next request started: opening file B before file A's
  read returned showed (and let the editor save) A's text under B's header.
- Error-state Retry buttons spin through useSpin; ImageLightbox uses useDialog.
- react-router-dom 6.30 -> 7.18.4 (GHSA-wrjc-x8rr-h8h6, GHSA-337j-9hxr-rhxg);
  screen snapshots gain only Link's data-discover attribute.
- StatusBar test follows v2.8.17's "Settings → AI tools → Profiles" text.

client/src/components/SnapshotButton.tsx

@@ -14,6 +14,7 @@ import { api } from "../lib/api";
 import { ConfirmModal } from "./ConfirmModal";
 import { Checkbox } from "./Checkbox";
 import { CopyButton } from "./event-views/primitives";
+import { copyText } from "../lib/clipboard";
 
 export function snapshotUrl(token: string): string {
   return `${window.location.origin}/snapshot/${token}`;
@@ -33,7 +34,7 @@ export function SnapshotButton({ sessionId }: { sessionId: string }) {
     try {
       const { snapshot } = await api.snapshots.create(sessionId, { filePaths: redact });
       setToken(snapshot.token);
-      navigator.clipboard?.writeText(snapshotUrl(snapshot.token)).catch(() => undefined);
+      void copyText(snapshotUrl(snapshot.token));
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err));
     } finally {