Dashboard: clean up header/footer chrome and show project name

[waleedkadous]

Problem

The dashboard has redundant/unhelpful chrome taking up space:

1. Top bar: Shows "Agent Farm" with "1 builders" count — neither is useful information at a glance
2. Bottom bar: Shows "1 builders 1 shells 1 files" — redundant with what's already visible in the tab layout
3. Tab title: Shows generic "Agent Farm" — not helpful when multiple projects could be open

Proposed Changes

Header

• Replace "Agent Farm" with <project-name> dashboard (e.g., "codev-public dashboard")
• Remove the "N builders" badge
• Use the freed whitespace for something useful (suggestions below)

Footer

• Remove the "N builders N shells N files" counts entirely

Tab title

• Change from "Agent Farm" to <project-name> dashboard

Header whitespace suggestions

Options for what to put in the top bar's freed space:

• Tower uptime + version (e.g., "v2.0.10 · up 3h 12m")
• Quick status indicators — git branch, last commit age, CI status
• Nothing — just the project name left-aligned, clean and minimal
• Builder phase summaries — e.g., "422: implementing · 418: merged" (compact one-liner)

Context

The current counts are redundant — you can already see what's running in the tab layout. The "Agent Farm" branding wastes the most prominent screen real estate without conveying useful information.