dashboard-v2: fix asset base path to match backend /v2 mount

Console errors on the live dashboard (architect:7700) turned out to
be two separate problems layered together:

1. The deployed static bundle wasn't built from this repo at all --
   it called /api/v2/hot-refs, /api/v2/anomalies, and
   /api/v2/node/*/metrics-history, none of which exist anywhere in
   this codebase on any branch (checked via `git log --all -S`).
   Someone built and shipped a frontend straight to
   /usr/share/claw-store/v2 without ever committing the source.

2. Separately, this repo's own committed vite.config.ts had a latent
   bug: `base: '/clawstor/'`, contradicting its own comment ("served
   by claw-store serve under /v2/*") and the actual backend mount in
   serve.rs (`nest_service("/v2", ...)`). Checked `tailscale serve
   status` on tank + architect -- neither has ever proxied a
   /clawstor path, so that base would have 404'd every asset the
   moment anyone rebuilt and redeployed from source.

Fix: base = '/v2/', matching the real mount. Rebuilt and redeployed
to tank + architect (orphaned build backed up to
/usr/share/claw-store/v2.bak-orphaned on both).

Co-Authored-By: Claude Sonnet 5 <[email protected]>

dashboard-v2/tsconfig.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/app.tsx","./src/main.tsx","./src/components/nodecard.tsx","./src/components/projectspanel.tsx","./src/components/stattile.tsx","./src/components/storagebar.tsx","./src/lib/api.ts","./src/pages/commandcenter.tsx","./src/pages/nodedetail.tsx","./src/pages/reftrackingpage.tsx","./src/pages/storagebrowser.tsx"],"version":"6.0.3"}
+{"root":["./src/App.tsx","./src/main.tsx","./src/components/NodeCard.tsx","./src/components/ProjectsPanel.tsx","./src/components/StatTile.tsx","./src/components/StorageBar.tsx","./src/lib/api.ts","./src/pages/CommandCenter.tsx","./src/pages/NodeDetail.tsx","./src/pages/RefTrackingPage.tsx","./src/pages/StorageBrowser.tsx"],"version":"6.0.3"}