fix(redesign): brand snap, event sentences, palette glass, full width

Round-up of feedback:

- Brand: drop italic-gradient 'Bridge' wordmark + 'SERVICE
  NOTIFICATIONS' tag. Now plain 'Notify Bridge' bold sans + 'v0.5.2'
  mono — exactly what the Aurora mockup shows.
- Event rows: replaced [collection_name] [event_tag] [count_tag] with
  a sentence form — bold provider, muted verb, bold count, gradient
  italic-feeling collection. Matches the mockup's 'Immich added 14
  assets to «...»' pattern. Tracker → provider trail kept underneath.
- SearchPalette: re-skinned to Aurora glass — solid surface (was
  using the now-translucent --color-card token and was nearly
  invisible), backdrop blur, hairline section headers with
  letterspaced mono labels, gradient active row, glass-bordered
  result icons + detail pills.
- 'On watch' provider deck hidden when a global provider filter is
  active (deck would only show that one provider — redundant). Two-col
  grid collapses to single full-width column in that mode.
- Layout: dropped the max-w-7xl cap on the topbar and the page
  container. Pages now stretch to full available width on wide
  displays.
- Section labels in sidebar: dropped :global() wrapper since the
  element is in the same component. Added font-mono for tighter
  letterspacing match to the mockup.

Build clean.

frontend/src/routes/+page.svelte

@@ -453,7 +453,7 @@
 	{@render statCards()}
 
 	<!-- ==================== TWO COL: stream + provider deck ==================== -->
-	<div class="two-col">
+	<div class="two-col" class:two-col--single={!!globalProviderFilter.id}>
 		<!-- Signal stream -->
 		<section class="panel">
 			<header class="panel-head">
@@ -532,20 +532,22 @@
 								<MdiIcon name={eventIcons[event.event_type] || 'mdiBell'} size={18} />
 							</div>
 							<div class="signal-body min-w-0">
-								<div class="signal-head">
-									<span class="signal-verb truncate">{event.collection_name}</span>
-									<span class="signal-tag">{t(eventLabels[event.event_type] || event.event_type)}</span>
+								<div class="signal-sentence">
+									{#if event.provider_name}<b class="signal-emph">{event.provider_name}</b>{/if}
+									<span class="signal-verb">{t(eventLabels[event.event_type] || event.event_type)}</span>
 									{#if event.assets_count > 0}
-										<span class="signal-tag accent">{event.assets_count} {event.assets_count === 1 ? t('dashboard.asset') : t('dashboard.assets')}</span>
+										<b class="signal-emph">{event.assets_count} {event.assets_count === 1 ? t('dashboard.asset') : t('dashboard.assets')}</b>
+									{/if}
+									{#if event.collection_name}
+										<span class="signal-conn">·</span>
+										<b class="signal-emph signal-emph--accent truncate">«{event.collection_name}»</b>
 									{/if}
 								</div>
-								{#if event.provider_name || event.tracker_name}
+								{#if event.tracker_name}
 									<div class="signal-trail">
-										{#if event.tracker_name}
-											<span class="ch"><MdiIcon name="mdiRadar" size={11} />{event.tracker_name}</span>
-											<span class="arrow">→</span>
-										{/if}
+										<span class="ch"><MdiIcon name="mdiRadar" size={11} />{event.tracker_name}</span>
 										{#if event.provider_name}
+											<span class="arrow">→</span>
 											<span class="ch"><MdiIcon name="mdiServer" size={11} />{event.provider_name}</span>
 										{/if}
 									</div>
@@ -565,7 +567,9 @@
 			{/if}
 		</section>
 
-		<!-- On watch — provider deck -->
+		<!-- On watch — provider deck. Hidden when a global provider filter is
+		     active (the deck would only show that one provider — redundant). -->
+		{#if !globalProviderFilter.id}
 		<section class="panel">
 			<header class="panel-head">
 				<div>
@@ -614,6 +618,7 @@
 				</div>
 			{/if}
 		</section>
+		{/if}
 	</div>
 
 	<!-- ==================== PULSE CHART ==================== -->
@@ -899,6 +904,7 @@
 		gap: 1.5rem;
 		margin-top: 1.5rem;
 	}
+	.two-col.two-col--single { grid-template-columns: 1fr; }
 	@media (max-width: 1100px) { .two-col { grid-template-columns: 1fr; } }
 
 	/* ============================================================
@@ -1029,31 +1035,32 @@
 		box-shadow: 0 4px 14px -4px var(--g1, var(--color-primary)), inset 0 1px 0 rgba(255,255,255,0.3);
 	}
 	.signal-body { min-width: 0; }
-	.signal-head {
-		display: flex; align-items: center; gap: 0.5rem;
+	.signal-sentence {
+		display: flex; align-items: baseline;
+		gap: 0.4rem;
+		font-size: 0.92rem;
+		line-height: 1.45;
+		color: var(--color-foreground);
 		flex-wrap: wrap;
-		font-size: 0.9rem;
+	}
+	.signal-emph {
+		font-weight: 600;
 		color: var(--color-foreground);
 	}
-	.signal-verb { font-weight: 500; max-width: 26ch; }
-	.signal-tag {
-		display: inline-block;
-		font-size: 0.62rem;
-		font-weight: 500;
-		text-transform: uppercase;
-		letter-spacing: 0.05em;
-		padding: 0.13rem 0.5rem;
-		border-radius: 999px;
-		background: var(--color-glass-strong);
-		color: var(--color-muted-foreground);
-		white-space: nowrap;
-		font-family: var(--font-mono);
-		border: 1px solid var(--color-border);
+	.signal-emph--accent {
+		background: linear-gradient(135deg, var(--color-primary), var(--color-orchid));
+		-webkit-background-clip: text;
+		background-clip: text;
+		color: transparent;
+		font-weight: 600;
+		max-width: 24ch;
 	}
-	.signal-tag.accent {
-		background: rgba(184, 167, 255, 0.14);
-		border-color: rgba(184, 167, 255, 0.3);
-		color: var(--color-primary);
+	.signal-verb {
+		font-weight: 400;
+		color: var(--color-muted-foreground);
+	}
+	.signal-conn {
+		color: var(--color-rule-strong);
 	}
 	.signal-trail {
 		display: flex; align-items: center; gap: 0.4rem;