Settings › Providers: readable, linkable, no repeated facts

Goal: Settings › Providers reads cleanly at 390px and 1440px, states each fact once, and can be linked to. Supersedes drafts 7528 and 7497. - `/settings/providers` redirects to `/settings?area=providers&section=providers` instead of "Page not found". - A gap the Runtime line already explains is hidden or muted ("see Runtime"). On phone, name the reason inline rather than pointing several screens up. - Group Views by view ("Agent activity: API key, Jaah account · TUI: Subscription") so a label never wraps away from its value. - An OFF runtime switch shows its state word ("Terminal"), as ON shows "ACP host". - A row whose every flag is off (e.g. Antigravity Sessions) collapses to one "none". - Capability labels are consistent noun phrases. - Gap prose uses em dashes, not " - ". Out of scope: lane and switch semantics, the `acp-runtime` API, catalogue rows. Done means: - Component/e2e tests cover the redirect, the absence of a duplicated lane reason, and the OFF state word. - Screenshots at 390px and 1440px. Required checks: ./dc check full

Settings › Providers: /settings/providers redirect, Views grouped by view, all-off rows read "none", noun-phrase labels, em-dash gap prose, no repeated lane reason on phone. Merged #6077 via the merge lane. One gate stage failed on a timing flake in an untouched suite (passed 3/3 alone); deploy was superseded by a newer push. Visual check done at 390px and 1440px. Follow-up draft: #7564.