feat: Sparky UX/telemetry patterns (review only — do not merge yet)

[MikeGibbsOnyx]

Summary

Steal selected UX/telemetry patterns from The Sparky Command Center into sparkDash. sparkDash stays Node/Vite/ops. This is not a Python rewrite and not a read-only dashboard.

Please do not merge to main until Mia and a second reviewer have signed off.

Motivation

Sparky is a different product (stdlib Python, :8890, read-only SSH + Prometheus). Several of its displays are worth copying:

1. Live in-flight decode strip (N live · ~X tok/s each · Y combined) instead of a sticky last_gen gauge
2. Token totals that survive a vLLM/process bounce
3. Comfy VRAM high-water while rendering (idle VRAM lies)
4. Collapse all / expand all for screen real estate
5. Optional fabric caption (we have CX7/QSFP, not MikroTik)
6. Probe failures must not crash the poller

Changes

• src/lib/liveStrip.ts + LLM panel: always show idle or live strip; lifetime tokens
• server/tokenBank.js: persist {banked,lastLive} per sparkId:port in config/token-bank.json
• ComfyProbe: vramUsed / vramTotal / vramPeak from /system_stats
• Spark page: Collapse all / Expand all (same localStorage as Resources/Services)
• FabricPanel: closeable note, optional fabricNote on a spark; no switch scrape
• Tests: token bank reset, live-strip format
• Write-up: SPARKY-PATTERNS.md

Not in this PR: drag-reorder (CSS grid GPU row-span), MikroTik/RoCE poller, AuthGate, admin token.

Test Plan

• npm test — server 318, frontend 25 (local Mac)
• vite build — no AuthGate strings in dist
• Isolated smoke :5555 / :5599 loopback
• Reviewer: open a spark tab (not Overview); hard-refresh
• Reviewer: Collapse all / Fabric Close
• Reviewer: live strip needs an actual decode

Notes for Reviewers

• Features live on spark detail, not Overview.
• Live strip is idle — no in-flight decode until requestsRunning > 0 and generationTps > 0.
• Token bank writes config/token-bank.json (gitignored).
• settings.json runtime drift is not in this commit.

Fork: MikeGibbsOnyx/sparkDash branch feat/sparky-patterns-local (8ae0c32).