Add Decodex app operator metrics

[yvette-carlisle]

Summary

• expose the published operator snapshot through /api/operator-snapshot for the menubar app
• add a compact Intake / Running / Review / Landing strip and per-account running run chips
• add an app WebUI shortcut and tighten the header subtitle so it no longer truncates awkwardly
• hide API-only automation_disabled snapshots from the panel to avoid misleading degraded UI

Validation

• cargo +nightly fmt --all -- --check
• vstyle curate --language rust --workspace --all-features
• swift build --package-path apps/decodex-app
• cargo test -p decodex operator_app_snapshot_endpoint_returns_json
• cargo check -p decodex
• cargo make test-decodex-app-stage
• git diff --check
• runtime smoke: ./target/debug/decodex serve --api-only --listen-address 127.0.0.1:8914 plus curl /api/operator-snapshot and /livez