Initial TopDeck: self-hosted ranked favorites

A single Go binary with SQLite that serves a public page of the owner's
ranked lists (movies, TV, albums, songs, video games, theater) and a
login-gated editor.

- Lists of 1–65,535 entries (100 recommended), several per category
- Search-to-add via TMDB, TheTVDB, IGDB, Deezer/MusicBrainz, Wikipedia;
  manual entry as a fallback
- Theater entries carry a production (Broadway, tour, …), venue and cast
- Artwork cached locally; URL override and uploads
- Drag, arrow and type-a-rank reordering; paginated for long lists
- 12 theme presets plus custom CSS
- First-run setup code or env-provided admin; bcrypt, rate-limited login,
  CSRF-guarded JSON API
- Dockerfile and docker-compose.yml

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/static/css/themes.css

@@ -0,0 +1,231 @@
+/*
+ * TopDeck theme presets.
+ *
+ * Every color on the site comes from these variables, so a custom theme only
+ * needs to override them (Settings → Appearance → Custom CSS), e.g.
+ *
+ *   :root, [data-theme] { --accent: #ff4f81; --bg: #120d14; }
+ */
+
+:root,
+[data-theme="midnight"] {
+  color-scheme: dark;
+  --bg: #0f1117;
+  --surface: #171a22;
+  --surface-2: #1f232e;
+  --border: #2a2f3c;
+  --text: #eceef4;
+  --muted: #9aa1b2;
+  --faint: #636a7c;
+  --accent: #8b7dff;
+  --accent-text: #ffffff;
+  --accent-soft: rgba(139, 125, 255, 0.14);
+  --danger: #ff6b7a;
+  --success: #4fd1a1;
+  --warn: #f5b84b;
+  --gold: #f5c451;
+  --silver: #cfd6e4;
+  --bronze: #d99a6c;
+  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
+  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+  --font-display: var(--font);
+  --radius: 10px;
+  --radius-art: 8px;
+}
+
+[data-theme="obsidian"] {
+  color-scheme: dark;
+  --bg: #000000;
+  --surface: #0c0c0c;
+  --surface-2: #161616;
+  --border: #262626;
+  --text: #f5f5f5;
+  --muted: #a3a3a3;
+  --faint: #5f5f5f;
+  --accent: #f5f5f5;
+  --accent-text: #000000;
+  --accent-soft: rgba(255, 255, 255, 0.09);
+  --shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
+}
+
+[data-theme="nord"] {
+  color-scheme: dark;
+  --bg: #242933;
+  --surface: #2e3440;
+  --surface-2: #3b4252;
+  --border: #434c5e;
+  --text: #eceff4;
+  --muted: #b4bccb;
+  --faint: #7b8598;
+  --accent: #88c0d0;
+  --accent-text: #1f242d;
+  --accent-soft: rgba(136, 192, 208, 0.15);
+  --danger: #bf616a;
+  --success: #a3be8c;
+  --warn: #ebcb8b;
+}
+
+[data-theme="dracula"] {
+  color-scheme: dark;
+  --bg: #21222c;
+  --surface: #282a36;
+  --surface-2: #343746;
+  --border: #44475a;
+  --text: #f8f8f2;
+  --muted: #b6b9cf;
+  --faint: #6272a4;
+  --accent: #ff79c6;
+  --accent-text: #21222c;
+  --accent-soft: rgba(255, 121, 198, 0.14);
+  --danger: #ff5555;
+  --success: #50fa7b;
+  --warn: #f1fa8c;
+}
+
+[data-theme="mocha"] {
+  color-scheme: dark;
+  --bg: #181825;
+  --surface: #1e1e2e;
+  --surface-2: #313244;
+  --border: #45475a;
+  --text: #cdd6f4;
+  --muted: #a6adc8;
+  --faint: #6c7086;
+  --accent: #cba6f7;
+  --accent-text: #1e1e2e;
+  --accent-soft: rgba(203, 166, 247, 0.14);
+  --danger: #f38ba8;
+  --success: #a6e3a1;
+  --warn: #f9e2af;
+}
+
+[data-theme="rose-pine"] {
+  color-scheme: dark;
+  --bg: #191724;
+  --surface: #1f1d2e;
+  --surface-2: #26233a;
+  --border: #393552;
+  --text: #e0def4;
+  --muted: #a8a4c4;
+  --faint: #6e6a86;
+  --accent: #ebbcba;
+  --accent-text: #191724;
+  --accent-soft: rgba(235, 188, 186, 0.14);
+  --danger: #eb6f92;
+  --success: #9ccfd8;
+  --warn: #f6c177;
+}
+
+[data-theme="gruvbox"] {
+  color-scheme: dark;
+  --bg: #1d2021;
+  --surface: #282828;
+  --surface-2: #32302f;
+  --border: #45403d;
+  --text: #ebdbb2;
+  --muted: #bdae93;
+  --faint: #7c6f64;
+  --accent: #fe8019;
+  --accent-text: #1d2021;
+  --accent-soft: rgba(254, 128, 25, 0.14);
+  --danger: #fb4934;
+  --success: #b8bb26;
+  --warn: #fabd2f;
+}
+
+[data-theme="forest"] {
+  color-scheme: dark;
+  --bg: #0f1612;
+  --surface: #151f19;
+  --surface-2: #1c2921;
+  --border: #29392f;
+  --text: #e4efe7;
+  --muted: #9fb5a6;
+  --faint: #62786a;
+  --accent: #7fd49b;
+  --accent-text: #0f1612;
+  --accent-soft: rgba(127, 212, 155, 0.13);
+}
+
+[data-theme="synthwave"] {
+  color-scheme: dark;
+  --bg: #140b24;
+  --surface: #1d1133;
+  --surface-2: #281846;
+  --border: #3b2663;
+  --text: #f4eaff;
+  --muted: #bca8dc;
+  --faint: #7a649e;
+  --accent: #ff4fd8;
+  --accent-text: #140b24;
+  --accent-soft: rgba(255, 79, 216, 0.15);
+  --warn: #ffd166;
+  --success: #36f1cd;
+  --shadow: 0 10px 40px rgba(255, 79, 216, 0.12);
+}
+
+[data-theme="daylight"] {
+  color-scheme: light;
+  --bg: #f6f7f9;
+  --surface: #ffffff;
+  --surface-2: #eef0f4;
+  --border: #e0e3ea;
+  --text: #15171c;
+  --muted: #5d6475;
+  --faint: #9299a8;
+  --accent: #5b4ef0;
+  --accent-text: #ffffff;
+  --accent-soft: rgba(91, 78, 240, 0.1);
+  --danger: #d93a4b;
+  --success: #17915f;
+  --warn: #b7791f;
+  --gold: #d69e1a;
+  --silver: #8f98a8;
+  --bronze: #b8734a;
+  --shadow: 0 10px 30px rgba(20, 24, 40, 0.1);
+}
+
+[data-theme="paper"] {
+  color-scheme: light;
+  --bg: #f4efe6;
+  --surface: #fbf8f2;
+  --surface-2: #ece5d8;
+  --border: #ddd3c2;
+  --text: #2b2520;
+  --muted: #6e6457;
+  --faint: #a2978a;
+  --accent: #b5452f;
+  --accent-text: #fbf8f2;
+  --accent-soft: rgba(181, 69, 47, 0.1);
+  --danger: #b5452f;
+  --success: #3f7d4f;
+  --warn: #a8741a;
+  --gold: #b88a1b;
+  --silver: #8a8a8a;
+  --bronze: #a0623b;
+  --shadow: 0 10px 30px rgba(60, 40, 20, 0.1);
+  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, ui-serif, serif;
+  --radius: 4px;
+  --radius-art: 3px;
+}
+
+[data-theme="latte"] {
+  color-scheme: light;
+  --bg: #eff1f5;
+  --surface: #ffffff;
+  --surface-2: #e6e9ef;
+  --border: #ccd0da;
+  --text: #4c4f69;
+  --muted: #6c6f85;
+  --faint: #9ca0b0;
+  --accent: #8839ef;
+  --accent-text: #ffffff;
+  --accent-soft: rgba(136, 57, 239, 0.1);
+  --danger: #d20f39;
+  --success: #40a02b;
+  --warn: #df8e1d;
+  --gold: #df8e1d;
+  --silver: #8c8fa1;
+  --bronze: #c06d3a;
+  --shadow: 0 10px 30px rgba(76, 79, 105, 0.12);
+}