docs+release: Phase 4 launch artifacts

README hero with real screenshots, install/config/widget docs, goreleaser
for dash + dash-agent, GHCR release workflow, changelog, community files,
agent systemd unit and Dockerfile, version stamping via -X main.version.

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CHANGELOG.md

@@ -0,0 +1,87 @@
+# Changelog
+
+All notable changes to Dash. Format follows
+[Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versions follow
+[Semantic Versioning](https://semver.org/).
+
+## [Unreleased]
+
+## [0.7.0] — 2026-09-21
+
+### Added
+
+- Incidents with open/ack/resolve/close lifecycle and per-incident update
+  timeline; monitors auto-open and auto-resolve incidents on transitions
+- Maintenance windows that suppress monitor alerts
+- Public status pages at `/status/:slug` (unauthenticated, per-page monitor
+  and system selection)
+- SVG badges: `/api/badge/monitor/:id.svg`, `/api/badge/domain/:id.svg`
+- Prometheus metrics at `/api/metrics`
+- CSV bulk import (`/api/import/csv`) and monitors/domains/systems in JSON
+  export
+- Generic webhook notifications (`notify_webhook` setting): monitor up/down
+  and domain events, Slack/Discord/ntfy-compatible payload, `/api/notify/test`
+
+## [0.6.0] — 2026-09-21
+
+### Added
+
+- System monitoring: `systems` + `system_stats`, bearer-token push ingest
+  (`/api/systems/ingest`), offline detection
+- `dash-agent` binary: Linux collector for CPU, memory, swap, disk, network,
+  load, uptime, temperatures, and Docker container state
+- Systems list and detail pages with Recharts graphs; system board widget
+
+## [0.5.0] — 2026-09-21
+
+### Added
+
+- Domain watch: RDAP + TCP-WHOIS lookup, WHOIS parsing, DNS records
+  (NS/MX/TXT/A/AAAA), TLS certificate details, host geo, DNS/email/hosting/
+  certificate provider detection
+- Daily refresh scheduler, manual refresh, check history
+- Domain list and detail pages, expiry and SSL countdowns, domain board widget
+
+## [0.4.0] — 2026-09-21
+
+### Added
+
+- Uptime monitors: HTTP, TCP, ping, DNS, keyword, JSON-path, and push types;
+  interval/timeout/retries config, heartbeat history, 24h/30d uptime stats
+- Monitor scheduler, check-now endpoint, push ingest (`/api/push/:token`)
+- Monitor list and detail pages, monitor board widget, service-to-monitor
+  creation checkbox
+- Importers: Homepage `services.yml`, Homarr JSON, Dashy `conf.yml`
+
+## [0.3.0] — 2026-09-17
+
+### Added
+
+- Index and Console board renderers (four total), command palette (⌘K),
+  icon CDN suggestions
+
+## [0.2.0] — 2026-09-17
+
+### Added
+
+- Widget layer: Go fetcher registry, config-field metadata, 30s TTL cache
+- Pi-hole, AdGuard Home, Immich, and clock widgets; per-widget config UI
+
+## [0.1.0] — 2026-09-17
+
+### Added
+
+- Board MVP: sections, items, multi-URL services, drag-drop, collapse state
+- Bento and Cards renderers, dark/light themes, icon upload + letter fallback
+- Server-side status pings with up/down chips
+- Single Go binary serving the embedded React UI; SQLite via goose migrations;
+  Docker image on distroless
+
+[Unreleased]: https://github.com/Dvorinka/Dash/compare/v0.7.0...HEAD
+[0.7.0]: https://github.com/Dvorinka/Dash/compare/v0.6.0...v0.7.0
+[0.6.0]: https://github.com/Dvorinka/Dash/compare/v0.5.0...v0.6.0
+[0.5.0]: https://github.com/Dvorinka/Dash/compare/v0.4.0...v0.5.0
+[0.4.0]: https://github.com/Dvorinka/Dash/compare/v0.3.0...v0.4.0
+[0.3.0]: https://github.com/Dvorinka/Dash/compare/v0.2.0...v0.3.0
+[0.2.0]: https://github.com/Dvorinka/Dash/compare/v0.1.0...v0.2.0
+[0.1.0]: https://github.com/Dvorinka/Dash/releases/tag/v0.1.0