chore: initial commit — Radio v0.1.0 (Phase A complete)

First release of a-radio — a free, focused SomaFM player for the
WordPress admin. Extracted-and-rebuilt from RangerPlex's RadioPlayer
component, simplified along the way (no Node CORS proxy needed; the
browser plays SomaFM streams directly).

Phase A deliverables — all in this commit:

PLAYER SURFACES
- Dashboard widget on WP Admin → Dashboard (compact: play/pause +
  station select + volume).
- Dedicated admin page at WP Admin → Radio → My Radio (larger
  layout, station genre badge, volume %% display).
- Both surfaces share the same JS — picking a station on one mirrors
  to the other within the same admin session.

STATIONS
- 44 SomaFM stations grouped by 10 genres (Ambient / Electronic /
  Lounge / Rock / Metal / Jazz / World / Reggae / Holiday / Specials).
- Ported verbatim from RangerPlex's RadioPlayer.tsx.
- Default station: Groove Salad (most popular SomaFM channel, safe
  ambient/coding pick).

STATE
- Per-user state stored in user_meta under key `radio_state`:
  { station_id, volume, theme, last_played_at }.
- Settings page lets the user pick default station, default volume,
  theme (auto/light/dark), and hide the dashboard widget.
- AJAX endpoint `radio_save_state` persists changes without a page
  reload. Nonce-protected, capability-checked, only known keys
  accepted, station validated against the list, volume clamped to
  [0,1].

UPDATES
- Self-hosted updater wired to Gitea (ranger/a-radio) from commit 1.
- Direct port of Buddy's inc/updater.php with BUDDY_* → RADIO_* and
  buddy_* → radio_* renames. Same 12h-success / 1h-error caching.

ARCHITECTURE
- No `wp` prefix (trademark policy).
- GPL v2+ public Gitea repo from day one.
- Vanilla JS only — no React, no webpack, no minified-only files.
- CSS-only animations, all assets local.
- Single H1 per admin page.
- Direct HTML5 <audio> playback (SomaFM has CORS headers; no PHP
  audio proxy needed). This is the key simplification vs RangerPlex.

COMPLIANCE
- "Powered by SomaFM" credit displayed on both player surfaces with
  link to somafm.com. About page invites users to donate to SomaFM
  directly.

PHASE PROGRESSION (not in this commit)
- Phase B — Settings polish + retry on transient stream errors +
  README.md formatted for WP.org submission.
- Phase C — Now-playing metadata via SomaFM's per-station song
  history endpoint (this is where the RangerPlex proxy logic ports
  to — server-side, for metadata not audio).
- Phase D — [ranger_radio] shortcode for frontend embedding.
- Phase E — Favorites system.
- Phase F — Multi-provider (Radio Paradise / NTS / KEXP / BBC).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -0,0 +1,47 @@
+# Changelog
+
+All notable changes to **Radio** are documented here.
+Format: [Keep a Changelog 1.1.0](https://keepachangelog.com/en/1.1.0/) — versioning: [SemVer](https://semver.org/).
+
+---
+
+## [Unreleased]
+
+---
+
+## [0.1.0] — 2026-05-26
+
+**Radio is born.** First release of a new standalone WordPress plugin extracted-and-rebuilt from the radio feature that lives inside RangerPlex. Radio stands on its own as a focused, friendly companion plugin for the WordPress dashboard — a tab of background music while you work.
+
+### Added — Phase A complete (player exists)
+- **Dashboard widget** at WP Admin → Dashboard showing a compact mini-player with play/pause, station select grouped by genre, and a volume slider.
+- **Dedicated admin page** at WP Admin → Radio → My Radio showing the same controls in a larger format with the station's genre badge and description.
+- **44 SomaFM stations** across **10 genres** (Ambient, Electronic, Lounge, Rock, Metal, Jazz, World, Reggae, Holiday, Specials). Stream URLs use SomaFM's public 128kbps MP3 endpoints — no proxy server required.
+- **Per-user state storage** via `user_meta` (key: `radio_state`). Each WordPress admin remembers their own station choice, volume, and theme preference.
+- **Settings page** at WP Admin → Radio → Settings with default station, default volume, theme (auto/light/dark), and an opt-out for the dashboard widget. Updates panel shown to admins with `manage_options`.
+- **About page** at WP Admin → Radio → About with plain-language explanation of what the plugin does, who it's for, version history, and credits to SomaFM.
+- **Self-hosted update checker** wired up to the Gitea repo (`ranger/a-radio`) from commit 1. Polls `/api/v1/repos/ranger/a-radio/releases/latest` with a `/tags?limit=1` fallback. 12h success cache, 1h negative cache.
+- **AJAX endpoint** `radio_save_state` for persisting station/volume changes without a page reload. Nonce-protected, capability-checked.
+- **Custom admin-menu icon** (`dashicons-format-audio`).
+- **Direct HTML5 `<audio>` playback** — no Node proxy, no PHP stream-passthrough, no server-side resource cost per listener. SomaFM's CORS headers make this work out of the box in modern browsers.
+
+### Architecture (locked from day one)
+- **Single-word brand name `Radio`** — no "WP" prefix, no marketplace trademark hurdle.
+- **Public GPL v2+ Gitea repo** at `ranger/a-radio` on `git.davidtkeane.com`.
+- **Per-user state in `user_meta`** under key `radio_state`.
+- **Vanilla JS only** — no React, no build step, no bundler. ~200 lines of JS controlling all interactions.
+- **CSS-only animations, all assets local** — bundle stays sub-100KB.
+- **Single H1 per admin page**, no nested toggle boxes — Tier-1 discipline carried forward from the Logbook + Buddy lineage.
+- **Sanitize on input, escape on output** throughout. Every AJAX endpoint nonce-protected and capability-checked.
+
+### Compliance
+- Station list and stream URLs are SomaFM's public, freely-published endpoints. Their terms allow redistribution with attribution.
+- "Powered by SomaFM" credit displayed in both player surfaces, linking to somafm.com.
+- The About page invites users to donate to SomaFM directly.
+
+### Not in this release (planned)
+- Phase B — Settings polish + README for WP.org submission + retry logic for transient stream errors.
+- Phase C — Now-playing metadata via SomaFM's per-station song-history endpoint.
+- Phase D — `[ranger_radio]` shortcode so the player can be embedded in posts/pages.
+- Phase E — Favorites system.
+- Phase F — Multi-provider (Radio Paradise, NTS Radio, KEXP, BBC) with a provider abstraction.