fix(node-ui): fill context graph route panel

[Jurij89]

Summary

• Implements PR 1.1 / M7 from the Context Graph UX/UI rollout by giving ProjectView one bounded route-page flex shell between persistent project chrome and the provenance bar.
• Keeps the project strip, layer switcher, and provenance bar pinned while Overview, graph overview, query, layer views, sub-graph views, and entity detail own the remaining panel space.
• Contains sparse states and query/table results inside their page regions so loading/empty content no longer floats above unused panel space.

Related

• Context Graph UX/UI redesign rollout: M7 pages fill panel / flex shell.
• No GitHub issue linked.

Files changed

File	What
packages/node-ui/src/ui/views/ProjectView.tsx	Wraps routed Context Graph content in .v10-memory-explorer-page and tags the active route for layout styling.
packages/node-ui/src/ui/views/project/components.tsx	Gives query results and assertion loading/empty states bounded route regions.
packages/node-ui/src/ui/styles.css	Adds the flex-shell contract, centered in-panel empty/loading states, query result overflow containment, and fixed chrome sizing.

Test plan

• pnpm install --frozen-lockfile
• pnpm --filter @origintrail-official/dkg-core run build
• pnpm --filter @origintrail-official/dkg-node-ui run build
• pnpm --filter @origintrail-official/dkg-graph-viz run build
• pnpm --filter @origintrail-official/dkg-node-ui run build:ui
• pnpm --filter @origintrail-official/dkg-node-ui exec vitest run test/ui-compat.test.ts test/use-memory-entities-live-updates.test.ts test/use-memory-entities-partial.test.ts
• git diff --check
• Live-node Vite/Playwright walkthrough against Hello World: Overview, WM, Graph Overview empty state, Query, VM, and 900x700 responsive sizing all stayed within the panel with persistent chrome.
• Local PR review with GPT 5.5 xhigh reviewer: no actionable findings.

Known non-blocking note: full pnpm --filter @origintrail-official/dkg-node-ui test ran 36 files / 678 passing tests / 38 skipped tests, with one unrelated timeout in test/openclaw-bridge.test.ts outside the touched files.

[github-actions]

Codex review completed — no issues found.