feat: task slide-over panel, DM Sans typography, UI refinements

- TaskSlideOver: right-side panel with Next Up, Today, Upcoming, Quick Add
- Dashboard: compact task trigger replaces inline tasks
- Typography: DM Sans display font, antialiased rendering
- Cards: subtle hover elevation, colored left accent borders
- Navbar: accent-colored active states, frosted glass blur
- Badges: tighter uppercase style

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend-v2/src/lib/components/layout/Navbar.svelte

@@ -93,8 +93,8 @@
 		z-index: 50;
 		background: var(--nav-bg);
 		border-bottom: 1px solid var(--border);
-		backdrop-filter: blur(16px);
-		-webkit-backdrop-filter: blur(16px);
+		backdrop-filter: blur(20px) saturate(1.4);
+		-webkit-backdrop-filter: blur(20px) saturate(1.4);
 	}
 	.navbar-inner {
 		max-width: 1400px;
@@ -106,15 +106,16 @@
 		gap: var(--sp-5);
 	}
 	.navbar-logo {
-		font-weight: 600;
+		font-weight: 700;
 		font-size: var(--text-md);
 		display: flex;
 		align-items: center;
 		gap: var(--sp-2);
 		color: var(--text-1);
 		flex-shrink: 0;
+		letter-spacing: -0.02em;
 	}
-	.navbar-logo svg { width: 20px; height: 20px; }
+	.navbar-logo svg { width: 18px; height: 18px; color: var(--accent); }
 
 	.navbar-links {
 		display: flex;