v1.0.3 - In-note search, note history navigation, keyboard shortcuts

- Find in note (Ctrl+F): search within current note with match highlighting and navigation
- Global vault search moved to Ctrl+Shift+F
- Note history navigation: Alt+Left/Right and mouse back/forward buttons
- Search icon added to editor toolbar
- Escape closes Settings and Info panels
- Updated Info panel with new keyboard shortcuts
- Deb install type detection with APT upgrade instructions

src/lib/components/SettingsPanel.svelte

@@ -1069,6 +1069,11 @@
 											<div class="update-progress-fill" style="width: {updateProgress}%"></div>
 										</div>
 									{/if}
+								{:else if $installType === 'deb'}
+									<div class="update-apt-info">
+										<p>Update via your package manager:</p>
+										<code>sudo apt update && sudo apt upgrade helix-notes</code>
+									</div>
 								{:else}
 									<a class="update-install-btn" href="https://codeberg.org/ArkHost/HelixNotes/releases" target="_blank" rel="noopener">
 										<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
@@ -1945,6 +1950,23 @@
 		cursor: not-allowed;
 	}
 
+	.update-apt-info {
+		margin-top: 8px;
+	}
+	.update-apt-info p {
+		margin: 0 0 6px 0;
+		font-size: 13px;
+		color: var(--text-secondary);
+	}
+	.update-apt-info code {
+		display: block;
+		padding: 8px 12px;
+		background: var(--bg-secondary);
+		border-radius: 6px;
+		font-size: 12px;
+		user-select: all;
+	}
+
 	.update-progress-bar {
 		margin-top: 10px;
 		height: 6px;