fix(0.6.1): dashboard p95 fallback hint -> compact tooltip

[nicolotognoni]

Summary

• Replaces the verbose "X turns — p95 hidden until ≥10, showing p50" row under every latency card (and the "(N<10)" parenthetical labels) with a single inline ? badge whose title/aria-label shows the same explanation on hover/focus.
• Honest labels: the right latency box reads "p50 round-trip" / "end-to-end p50" / "p50" / "p50 wait" when n<10 — no more "P95 ... (N<10)" masquerade.
• Stacked on top of fix(dashboard): raise p95 sample threshold to 10 turns with p50 fallback #96 (fix/0.6.1-dashboard-p95-sample-threshold). Pure UI polish — no version bump, no behavioural change to the threshold or the underlying fallback math.

Implementation

• dashboard-app/src/components/LatencyPanel.tsx: dropped the inline hint row, dropped the (n<${MIN_TURNS_FOR_PERCENTILES}) suffix from labels, added a <span class="info-q">? next to the affected label when !showPercentiles. Same title= text on the badge.
• dashboard-app/src/components/MetricsPanel.tsx: same treatment in both the realtime (LatencyView realtime branch) and pipeline branches.
• dashboard-app/src/components/CallTable.tsx: tooltip wording aligned with the panels ("p95 hidden — needs ≥10 turns (n=X). Currently showing p50."). The inline (p50) suffix in the cell stays — it disambiguates the value at a glance without a hover.
• dashboard-app/src/styles/dashboard.css: new .info-q style — 12px circle, ? glyph, cursor: help, theme-friendly via currentColor.
• Bundle re-synced via dashboard-app/scripts/sync.mjs so libraries/python/getpatter/dashboard/ui.html and libraries/typescript/src/dashboard/ui.html reflect the UI.

Before:

+----------------------+----------------------+
| P50 ROUND-TRIP       | P50 ROUND-TRIP (N<10)|
| 309 ms               | 309 ms               |
+----------------------+----------------------+
6 turns — p95 hidden until ≥10, showing p50

After:

+----------------------+-------------------------+
| P50 ROUND-TRIP       | P50 ROUND-TRIP  (?)     |
| 309 ms               | 309 ms                  |
+----------------------+-------------------------+
    (hover ? → "p95 hidden — needs ≥10 turns
              (n=6). Currently showing p50.")

Breaking change?

No. UI text only; no API surface, no config, no metrics math change.

Test plan

• cd dashboard-app && npm test -- --run → 16/16 pass (mergeCalls + App)
• cd dashboard-app && npm run lint → tsc clean
• cd dashboard-app && npm run build → tsc clean, vite bundle 208.61 kB / gzip 64.92 kB
• node dashboard-app/scripts/sync.mjs → TS & Python SDK ui.html updated
• Manual: load dashboard with a live call <10 turns, confirm ? badge appears, hover shows tooltip, badge disappears at the 10-turn threshold.

Docs updates

N/A — internal dashboard UI polish, no docs page reference this string.