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/settings/SnapshotSettings.tsx

@@ -19,6 +19,7 @@ import { ContextMenu, MenuItem, MenuSeparator, useContextMenu } from "../Context
 import { CopyButton } from "../event-views/primitives";
 import { snapshotUrl } from "../SnapshotButton";
 import { SettingsSection } from "./SettingsRow";
+import { copyText } from "../../lib/clipboard";
 
 export function SnapshotSettings() {
   const { t } = useTranslation("settings");
@@ -116,9 +117,7 @@ export function SnapshotSettings() {
           <MenuItem onSelect={pick((s) => navigate(`/snapshot/${s.token}`))}>
             {t("snapshots.open")}
           </MenuItem>
-          <MenuItem
-            onSelect={pick((s) => void navigator.clipboard?.writeText(snapshotUrl(s.token)))}
-          >
+          <MenuItem onSelect={pick((s) => void copyText(snapshotUrl(s.token)))}>
             {t("snapshots.copyLink")}
           </MenuItem>
           <MenuSeparator />