feat(frontend): Scholarchat-inspired UI refactor with top nav, sidebar, and message actions

- Add TopNav component with AI Chat, Study Guides, Progress tabs
- Refactor sidebar to include brand, new chat, subjects, chat history, settings
- Add message action buttons (Helpful, Note, Deeper) on assistant responses
- Enhance ChatInput with photo, mic attachment icons and AI disclaimer
- Improve welcome state with 2x2 suggested prompt grid
- Update global layout for proper sidebar offset (fix nav overlap)
- Remove obsolete Header component
- All styles: strict BEM naming, zero inline CSS, Paper Look theme
This commit is contained in:
2026-08-14 08:07:42 -04:00
commit c9085bdefb
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/* ========================================
Sidebar Component — padhLe
======================================== */
/* Main Sidebar */
.sidebar {
position: fixed;
top: 0;
left: 0;
width: var(--sidebar-width);
height: 100vh;
background-color: var(--color-bg);
border-right: var(--border-thin);
display: flex;
flex-direction: column;
padding: var(--spacing-lg);
overflow-y: auto;
z-index: 10;
}
/* Scrollbar styling */
.sidebar::-webkit-scrollbar {
width: 4px;
}
.sidebar::-webkit-scrollbar-thumb {
background-color: var(--color-line);
border-radius: 2px;
}
/* Brand */
.sidebar__brand {
padding-bottom: var(--spacing-md);
margin-bottom: var(--spacing-md);
}
.sidebar__title {
font-family: var(--font-heading);
font-size: 2.25rem;
font-weight: 700;
letter-spacing: 0.05em;
color: var(--color-text);
}
/* New Chat Button */
.sidebar__new-chat {
display: flex;
align-items: center;
justify-content: center;
gap: var(--spacing-xs);
width: 100%;
padding: var(--spacing-sm);
border: var(--border-thin);
border-radius: var(--border-radius);
background-color: var(--color-bg);
color: var(--color-text);
font-family: var(--font-body);
font-size: 0.9rem;
font-weight: 400;
cursor: pointer;
transition: all var(--transition-fast);
margin-bottom: var(--spacing-lg);
}
.sidebar__new-chat:hover {
background-color: var(--color-hover);
border-color: var(--color-text-muted);
}
/* Section */
.sidebar__section {
margin-bottom: var(--spacing-md);
}
.sidebar__section--history {
flex: 1;
min-height: 0;
overflow-y: auto;
}
.sidebar__section-title {
font-size: 0.7rem;
font-weight: 500;
text-transform: uppercase;
letter-spacing: 0.1em;
color: var(--color-text-muted);
margin-bottom: var(--spacing-sm);
padding-left: var(--spacing-sm);
}
/* Subject List */
.sidebar__list {
list-style: none;
display: flex;
flex-direction: column;
gap: 2px;
}
.sidebar__link {
display: flex;
align-items: center;
gap: var(--spacing-sm);
width: 100%;
padding: var(--spacing-sm);
border: none;
background: transparent;
border-radius: var(--border-radius);
cursor: pointer;
font-family: var(--font-body);
font-size: 0.9rem;
font-weight: 300;
color: var(--color-text-muted);
text-align: left;
transition: all var(--transition-fast);
}
.sidebar__link:hover {
background-color: var(--color-hover);
color: var(--color-text);
}
.sidebar__link--active {
background-color: var(--color-accent);
color: var(--color-bg);
}
.sidebar__link--active:hover {
color: var(--color-bg);
}
.sidebar__icon {
display: flex;
align-items: center;
justify-content: center;
width: 20px;
font-size: 0.95rem;
}
/* Chat List */
.sidebar__chat-list {
list-style: none;
display: flex;
flex-direction: column;
gap: 2px;
}
.sidebar__chat-link {
display: flex;
flex-direction: column;
width: 100%;
padding: var(--spacing-sm);
padding-left: var(--spacing-sm);
border: none;
background: transparent;
border-radius: var(--border-radius);
cursor: pointer;
font-family: var(--font-body);
text-align: left;
transition: all var(--transition-fast);
}
.sidebar__chat-link:hover {
background-color: var(--color-hover);
}
.sidebar__chat-link--active {
background-color: var(--color-hover);
}
.sidebar__chat-preview {
font-size: 0.85rem;
font-weight: 400;
color: var(--color-text);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.sidebar__chat-time {
font-size: 0.7rem;
color: var(--color-text-muted);
margin-top: 2px;
}
/* Footer */
.sidebar__footer {
display: flex;
flex-direction: column;
gap: 4px;
padding-top: var(--spacing-sm);
border-top: var(--border-thin);
margin-top: auto;
}
.sidebar__footer-btn {
display: flex;
align-items: center;
gap: var(--spacing-sm);
width: 100%;
padding: var(--spacing-sm);
border: none;
background: transparent;
border-radius: var(--border-radius);
cursor: pointer;
font-family: var(--font-body);
font-size: 0.85rem;
font-weight: 300;
color: var(--color-text-muted);
text-align: left;
transition: all var(--transition-fast);
}
.sidebar__footer-btn:hover {
background-color: var(--color-hover);
color: var(--color-text);
}
.sidebar__footer-btn svg {
flex-shrink: 0;
}