feat: create web PWA frontend

5 files changed, 674 insertions, 0 deletions

diff --git a/web/css/components.css b/web/css/components.css
new file mode 100644
index 0000000..6d2f074
--- /dev/null
+++ b/web/css/components.css
@@ -0,0 +1,134 @@
+/* Buttons */
+.btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.35rem;
+  padding: 0.5rem 0.85rem;
+  border-radius: var(--radius-sm);
+  border: 1px solid transparent;
+  font-size: 0.85rem;
+  font-weight: 600;
+  line-height: 1.2;
+  cursor: pointer;
+  background: var(--bg-elevated);
+  color: var(--text-primary);
+  transition: background var(--transition-fast), border-color var(--transition-fast), transform 80ms ease;
+}
+.btn:hover { background: var(--bg-surface-hover); }
+.btn:active { transform: translateY(1px); }
+.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
+
+.btn-primary {
+  background: var(--accent);
+  color: #fff;
+  border-color: var(--accent-active);
+}
+.btn-primary:hover { background: var(--accent-hover); }
+.btn-danger {
+  background: var(--danger);
+  color: #fff;
+  border-color: #b91c1c;
+}
+.btn-danger:hover { background: #e04e4e; }
+.btn-ghost {
+  background: transparent;
+  color: var(--text-secondary);
+  border-color: var(--border);
+}
+.btn-ghost:hover { color: var(--text-primary); background: var(--bg-surface-hover); }
+.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.78rem; }
+.btn-lg { padding: 0.65rem 1.1rem; font-size: 0.95rem; }
+
+/* Icon buttons */
+.icon-btn {
+  width: 2.25rem;
+  height: 2.25rem;
+  border-radius: var(--radius-sm);
+  background: transparent;
+  border: 1px solid transparent;
+  color: var(--text-secondary);
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 1.05rem;
+  line-height: 1;
+  padding: 0;
+  transition: background var(--transition-fast), color var(--transition-fast);
+}
+.icon-btn:hover { background: var(--bg-surface-hover); color: var(--text-primary); }
+.icon-btn.active { color: var(--accent); background: var(--accent-soft); }
+
+/* Forms */
+input, textarea, select {
+  font: inherit;
+  color: var(--text-primary);
+  background: var(--bg-elevated);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  padding: 0.5rem 0.65rem;
+  width: 100%;
+}
+input:focus, textarea:focus, select:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px var(--accent-soft);
+}
+label {
+  display: block;
+  font-size: 0.8rem;
+  font-weight: 600;
+  margin: 0.35rem 0 0.2rem;
+  color: var(--text-secondary);
+}
+
+/* Error message */
+.error-message {
+  color: var(--danger);
+  font-size: 0.85rem;
+  min-height: 1.25rem;
+  margin: 0.35rem 0 0;
+}
+
+/* Search bar */
+.search-bar {
+  display: flex;
+  align-items: center;
+  gap: 0.4rem;
+  background: var(--bg-elevated);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  padding: 0.25rem 0.6rem;
+  max-width: 22rem;
+  width: 100%;
+}
+.search-bar input {
+  background: transparent;
+  border: none;
+  padding: 0.35rem 0.2rem;
+  flex: 1 1 auto;
+}
+.search-bar input:focus { box-shadow: none; }
+
+/* Toast */
+.toast {
+  position: fixed;
+  bottom: 1rem;
+  right: 1rem;
+  background: var(--bg-surface);
+  color: var(--text-primary);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-lg);
+  padding: 0.65rem 0.9rem;
+  z-index: 110;
+  font-size: 0.85rem;
+  transform: translateY(120%);
+  opacity: 0;
+  transition: transform var(--transition-base), opacity var(--transition-base);
+}
+.toast.show { transform: translateY(0); opacity: 1; }
+.toast.info { border-left: 4px solid var(--accent); }
+.toast.success { border-left: 4px solid var(--success); }
+.toast.error { border-left: 4px solid var(--danger); }
diff --git a/web/css/layout.css b/web/css/layout.css
new file mode 100644
index 0000000..9f51008
--- /dev/null
+++ b/web/css/layout.css
@@ -0,0 +1,276 @@
+/* Reset & base */
+*, *::before, *::after { box-sizing: border-box; }
+html, body {
+  height: 100%;
+}
+body {
+  margin: 0;
+  font-family: var(--font-sans);
+  background: var(--bg-body);
+  color: var(--text-primary);
+  line-height: 1.45;
+}
+
+/* Header */
+.site-header {
+  position: fixed;
+  inset: 0 0 auto 0;
+  height: var(--header-height);
+  background: var(--bg-surface);
+  border-bottom: 1px solid var(--border);
+  display: flex;
+  align-items: center;
+  gap: var(--gap);
+  padding: 0 1rem;
+  z-index: 50;
+}
+.site-header .logo {
+  font-weight: 700;
+  letter-spacing: 0.04em;
+  color: var(--text-primary);
+  text-decoration: none;
+}
+.site-header .spacer { flex: 1 1 auto; }
+
+/* Sidebar */
+.sidebar {
+  position: fixed;
+  inset: var(--header-height) auto 0 0;
+  width: var(--sidebar-width);
+  background: var(--bg-surface);
+  border-right: 1px solid var(--border);
+  overflow: auto;
+  padding: 0.75rem 0.5rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+  z-index: 40;
+}
+.sidebar h2 {
+  font-size: 0.75rem;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: var(--text-muted);
+  margin: 0.5rem 0.5rem 0.25rem;
+  padding-bottom: 0.25rem;
+  border-bottom: 1px solid var(--border);
+}
+.sidebar .set-item {
+  display: block;
+  padding: 0.4rem 0.6rem;
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  text-decoration: none;
+  cursor: pointer;
+  user-select: none;
+}
+.sidebar .set-item:hover,
+.sidebar .set-item:focus-visible {
+  background: var(--bg-surface-hover);
+  color: var(--text-primary);
+  outline: none;
+}
+.sidebar .set-item.active {
+  background: var(--accent-soft);
+  color: var(--accent);
+  font-weight: 600;
+}
+
+/* Main layout */
+.page {
+  padding-top: var(--header-height);
+  padding-left: var(--sidebar-width);
+  min-height: 100vh;
+}
+.main-content {
+  padding: var(--gap);
+  max-width: 100%;
+}
+
+/* Media grid */
+.media-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
+  gap: var(--gap);
+}
+.media-card {
+  position: relative;
+  background: var(--bg-surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  overflow: hidden;
+  cursor: pointer;
+  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
+}
+.media-card:hover {
+  box-shadow: var(--shadow-md);
+  border-color: var(--border-strong);
+}
+.media-card.selected {
+  border-color: var(--selected-border);
+  background: var(--selected-bg);
+}
+.media-card.playing {
+  border-color: var(--playing-border);
+  background: var(--playing-bg);
+}
+.media-card .thumb-wrap {
+  position: relative;
+  aspect-ratio: 16 / 9;
+  background: var(--bg-elevated);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  overflow: hidden;
+}
+.media-card .thumb-wrap img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  display: block;
+}
+.media-card .thumb-wrap .placeholder {
+  color: var(--text-muted);
+  font-size: 0.85rem;
+}
+.media-card .meta {
+  padding: 0.55rem 0.65rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.15rem;
+  min-height: 3.5rem;
+}
+.media-card .title {
+  font-size: 0.9rem;
+  font-weight: 600;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.media-card .subtitle {
+  font-size: 0.78rem;
+  color: var(--text-secondary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.media-card .badge {
+  position: absolute;
+  top: 0.35rem;
+  right: 0.35rem;
+  font-size: 0.65rem;
+  padding: 0.15rem 0.4rem;
+  border-radius: var(--radius-sm);
+  background: var(--bg-overlay);
+  color: var(--text-primary);
+}
+
+/* Audio row variant */
+.media-row {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.5rem 0.75rem;
+  background: var(--bg-surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  cursor: pointer;
+  transition: border-color var(--transition-fast), background var(--transition-fast);
+}
+.media-row:hover {
+  background: var(--bg-surface-hover);
+  border-color: var(--border-strong);
+}
+.media-row.selected {
+  border-color: var(--selected-border);
+  background: var(--selected-bg);
+}
+.media-row.playing {
+  border-color: var(--playing-border);
+  background: var(--playing-bg);
+}
+.media-row .row-icon {
+  color: var(--text-muted);
+  font-size: 1.1rem;
+}
+.media-row .row-body {
+  min-width: 0;
+  flex: 1 1 auto;
+}
+.media-row .row-title {
+  font-size: 0.9rem;
+  font-weight: 600;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.media-row .row-meta {
+  font-size: 0.78rem;
+  color: var(--text-secondary);
+}
+.media-row .row-duration {
+  font-size: 0.78rem;
+  color: var(--text-muted);
+  white-space: nowrap;
+}
+
+/* Modal */
+.modal-overlay {
+  position: fixed;
+  inset: 0;
+  background: var(--bg-overlay);
+  display: grid;
+  place-items: center;
+  z-index: 100;
+  opacity: 0;
+  visibility: hidden;
+  transition: opacity var(--transition-base), visibility var(--transition-base);
+}
+.modal-overlay.open {
+  opacity: 1;
+  visibility: visible;
+}
+.modal {
+  background: var(--bg-surface);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-lg);
+  width: min(40rem, 92vw);
+  max-height: 86vh;
+  overflow: auto;
+  padding: 1.25rem;
+}
+.modal-header {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  margin-bottom: 0.75rem;
+}
+.modal-header h3 { margin: 0; font-size: 1.1rem; }
+.modal-header .spacer { flex: 1 1 auto; }
+
+/* Responsive */
+@media (max-width: 860px) {
+  .sidebar {
+    position: fixed;
+    inset: var(--header-height) auto auto 0;
+    width: 100%;
+    height: auto;
+    max-height: 70vh;
+    border-right: none;
+    border-bottom: 1px solid var(--border);
+    display: none;
+  }
+  .sidebar.open { display: flex; }
+  .page { padding-left: 0; }
+  .media-grid { grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr)); }
+}
+
+@media (max-width: 520px) {
+  .media-grid { grid-template-columns: repeat(2, 1fr); }
+}
+
+/* Utilities */
+.hidden { display: none !important; }
+.overflow-hidden { overflow: hidden; }
+
diff --git a/web/css/login.css b/web/css/login.css
new file mode 100644
index 0000000..a32ebd8
--- /dev/null
+++ b/web/css/login.css
@@ -0,0 +1,27 @@
+/* Login / bootstrap page layout */
+.login-container {
+  min-height: 100vh;
+  display: grid;
+  place-items: center;
+  padding: 2rem 1rem;
+  background: var(--bg-body);
+}
+.login-container h1 {
+  margin: 0 0 0.25rem;
+  font-size: 1.5rem;
+}
+.login-container .subtitle {
+  margin: 0 0 1rem;
+  color: var(--text-secondary);
+  font-size: 0.85rem;
+}
+.login-form {
+  width: 100%;
+  max-width: 22rem;
+  background: var(--bg-surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-md);
+  padding: 1.25rem 1.25rem 1rem;
+}
+.login-form .btn { width: 100%; margin-top: 0.5rem; }
diff --git a/web/css/player.css b/web/css/player.css
new file mode 100644
index 0000000..e1c13b4
--- /dev/null
+++ b/web/css/player.css
@@ -0,0 +1,132 @@
+/* Player */
+.player {
+  position: fixed;
+  inset: auto 0 0 var(--sidebar-width);
+  background: var(--player-bg);
+  color: var(--text-primary);
+  border-top: 1px solid var(--border);
+  z-index: 60;
+  transition: inset var(--transition-base);
+}
+.player.is-fullscreen {
+  inset: 0;
+  background: #000;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}
+
+.player .stage {
+  position: relative;
+  background: #000;
+}
+.player:not(.is-fullscreen) .stage {
+  height: 0;
+  overflow: hidden;
+  transition: height var(--transition-base);
+}
+.player.open .stage {
+  height: clamp(10rem, 28vh, 26rem);
+}
+.player.is-fullscreen .stage {
+  flex: 1 1 auto;
+  height: auto;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.player video, .player audio {
+  width: 100%;
+  height: 100%;
+  display: block;
+  object-fit: contain;
+}
+.player.is-fullscreen video, .player.is-fullscreen audio {
+  max-height: 100%;
+}
+
+/* Overlay controls */
+.player .controls {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.5rem 0.75rem;
+}
+.player .controls .spacer { flex: 1 1 auto; }
+
+.player .time {
+  font-family: var(--font-mono);
+  font-size: 0.78rem;
+  color: var(--text-secondary);
+  white-space: nowrap;
+}
+
+/* Progress bar */
+.progress-track {
+  position: relative;
+  flex: 1 1 auto;
+  height: 0.35rem;
+  background: var(--player-progress-bg);
+  border-radius: 999px;
+  cursor: pointer;
+  overflow: hidden;
+}
+.progress-track:hover { height: 0.5rem; }
+.progress-fill {
+  position: absolute;
+  inset: 0 auto 0 0;
+  width: 0%;
+  background: var(--player-progress-fill);
+  border-radius: 999px;
+  transition: width 120ms linear;
+}
+.progress-thumb {
+  position: absolute;
+  top: 50%;
+  width: 0.9rem;
+  height: 0.9rem;
+  background: var(--player-thumb);
+  border-radius: 50%;
+  transform: translate(-50%, -50%) scale(0);
+  transition: transform var(--transition-fast);
+  pointer-events: none;
+}
+.progress-track:hover .progress-thumb,
+.progress-track:focus-within .progress-thumb {
+  transform: translate(-50%, -50%) scale(1);
+}
+
+/* Volume */
+.volume-control {
+  display: flex;
+  align-items: center;
+  gap: 0.25rem;
+}
+.volume-slider {
+  width: 5rem;
+  height: 0.25rem;
+  cursor: pointer;
+  accent-color: var(--accent);
+}
+
+/* Big play button */
+.big-play {
+  position: absolute;
+  inset: 0;
+  display: grid;
+  place-items: center;
+  background: rgba(0,0,0,0.35);
+  cursor: pointer;
+  z-index: 5;
+}
+.big-play .play-icon {
+  width: 3.5rem;
+  height: 3.5rem;
+  border-radius: 50%;
+  background: rgba(255,255,255,0.9);
+  color: #000;
+  display: grid;
+  place-items: center;
+  font-size: 1.25rem;
+}
diff --git a/web/css/theme.css b/web/css/theme.css
new file mode 100644
index 0000000..927b3b0
--- /dev/null
+++ b/web/css/theme.css
@@ -0,0 +1,105 @@
+:root {
+  /* Core palette */
+  --bg-body: #0f1117;
+  --bg-surface: #161920;
+  --bg-surface-hover: #1b1f27;
+  --bg-elevated: #1e222c;
+  --bg-overlay: rgba(0,0,0,0.65);
+
+  /* Text */
+  --text-primary: #e6e8ef;
+  --text-secondary: #a3a8b8;
+  --text-muted: #6b7280;
+  --text-inverse: #0b0d12;
+
+  /* Accent */
+  --accent: #5e9eff;
+  --accent-hover: #7cb2ff;
+  --accent-active: #3d8bf7;
+  --accent-soft: rgba(94,158,255,0.18);
+
+  /* Borders */
+  --border: #252a36;
+  --border-strong: #2e3546;
+
+  /* Feedback */
+  --danger: #f25c5c;
+  --danger-soft: rgba(242,92,92,0.18);
+  --success: #3ddc84;
+  --success-soft: rgba(61,220,132,0.18);
+  --warn: #ffb300;
+
+  /* Player */
+  --player-bg: #0b0d12;
+  --player-progress-bg: #2e3546;
+  --player-progress-fill: #5e9eff;
+  --player-thumb: #7cb2ff;
+
+  /* Selection */
+  --selected-bg: rgba(94,158,255,0.25);
+  --selected-border: #5e9eff;
+  --playing-bg: rgba(61,220,132,0.18);
+  --playing-border: #3ddc84;
+
+  /* Layout */
+  --header-height: 3.25rem;
+  --sidebar-width: 16rem;
+  --gap: 0.75rem;
+  --radius-sm: 0.375rem;
+  --radius-md: 0.625rem;
+  --radius-lg: 0.875rem;
+
+  /* Typography */
+  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
+  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+
+  /* Shadows */
+  --shadow-sm: 0 1px 2px rgba(0,0,0,0.35);
+  --shadow-md: 0 4px 12px rgba(0,0,0,0.45);
+  --shadow-lg: 0 10px 28px rgba(0,0,0,0.55);
+
+  /* Transitions */
+  --transition-fast: 120ms ease;
+  --transition-base: 200ms ease;
+}
+
+/* Light theme overrides */
+[data-theme="light"] {
+  --bg-body: #f4f5f8;
+  --bg-surface: #ffffff;
+  --bg-surface-hover: #f0f2f7;
+  --bg-elevated: #ffffff;
+  --bg-overlay: rgba(0,0,0,0.35);
+
+  --text-primary: #12131a;
+  --text-secondary: #4a4f5e;
+  --text-muted: #8b90a0;
+  --text-inverse: #ffffff;
+
+  --accent: #2b6cb0;
+  --accent-hover: #1a5490;
+  --accent-active: #17447a;
+  --accent-soft: rgba(43,108,176,0.14);
+
+  --border: #d6dae4;
+  --border-strong: #c3c9d6;
+
+  --danger: #c53030;
+  --danger-soft: rgba(197,48,48,0.14);
+  --success: #258855;
+  --success-soft: rgba(37,136,85,0.14);
+
+  --player-bg: #0b0d12;
+  --player-progress-bg: #d6dae4;
+  --player-progress-fill: #2b6cb0;
+  --player-thumb: #1a5490;
+
+  --selected-bg: rgba(43,108,176,0.18);
+  --selected-border: #2b6cb0;
+  --playing-bg: rgba(37,136,85,0.14);
+  --playing-border: #258855;
+
+  --shadow-sm: 0 1px 2px rgba(0,0,0,0.08);
+  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
+  --shadow-lg: 0 10px 28px rgba(0,0,0,0.12);
+}