Operator wanted the tab header visible on /flow.html so switching
tabs doesn't require navigating back to / first.
The flow page now reuses the same `<header class="dashboard-chrome">`
markup the dashboard renders, with a few tweaks:
- The SW4RM / Y3R C4LL / SYST3M tabs are cross-page links
(`href="/#swarm"` etc.) — clicking lands on the dashboard with the
destination tab pre-active via the hash router.
- The FL0W tab is rendered `.active.tab-link` + `aria-current="page"`
so it reads as the current view (no clickable arrow / "go here"
affordance — you're already here).
- Banner-thin echoes the dashboard for visual continuity.
- Notif controls cohabit with the tabs (same IDs the dashboard uses,
so app.js's NOTIF binding picks them up unchanged).
Layout glue:
- `body.flow-shell .dashboard-chrome.flow-chrome` overrides the
dashboard's `position: sticky` with `position: fixed` so the
chrome stays put under flow-shell's `overflow: hidden` body
layout, keeping the terminal full-viewport behind/beneath.
- New rule for the active FL0W tab — the `.tab-link` styling on the
dashboard otherwise reads as a passive cross-page link; here we
need it lit-up like a regular active tab.
- `--flow-header-h` bumped from 4.2em → 4.7em to match the natural
height of the tab strip + banner combo. Terminal padding +
inbox-pill top offset both derive from this variable, so they
follow automatically.
Removed:
- Legacy `.flow-title`, `.flow-hint`, `.flow-back` CSS rules (their
HTML counterparts are gone — the tab strip carries the
identity now).
- The `<a class="flow-back">← d4shb04rd</a>` link and the
`<h2 class="flow-title">` from flow.html.
## Validation
`npm run build` clean.
dashboard.css: 38kb → 37kb (legacy rules removed, new shared-
chrome rules are smaller)
flow.html: 4.4kb → 4.7kb (tab strip replaces title bar)
app.js: unchanged (no JS changes — the tab navigation is
pure HTML href + cross-page hash)
Closes#383.