docs: fix nav bar icons and spacing (#33)

* docs: fix nav bar icons and spacing

- Guides: puzzle → rocket (was duplicate of Agents icon)
- Enterprise: star → setting (better conveys admin/governance)
- Nav links: double horizontal padding (0.125rem → 0.25rem) for
  better click targets and breathing room

Co-Authored-By: Oz <oz-agent@warp.dev>

* docs: add custom building icon for Enterprise in header nav

Add an office building inline SVG for the Enterprise topic in
WarpTopicNav.astro, replacing the gear icon per review feedback.
The building has a simple outline with window dots and entrance,
stroke-matched to the other custom icons (robot, brackets).

sidebar.ts keeps star as the mobile drawer fallback since custom
SVGs can't be used in the starlight-sidebar-topics plugin.

Co-Authored-By: Oz <oz-agent@warp.dev>

---------

Co-authored-by: Oz <oz-agent@warp.dev>

Author: rachaelrenk

src/components/WarpTopicNav.astro

@@ -39,6 +39,7 @@ const { topics } = Astro.locals.starlightSidebarTopics;
 const CUSTOM_TOPIC_ICONS: Record<string, true> = {
 	Agents: true,
 	API: true,
+	Enterprise: true,
 };
 ---
 
@@ -73,6 +74,27 @@ const CUSTOM_TOPIC_ICONS: Record<string, true> = {
 										<path d="M16 18l6-6-6-6" />
 										<path d="M8 6l-6 6 6 6" />
 									</svg>
+								) : topic.label === 'Enterprise' ? (
+									/* Office building — simple outline: tall rectangle
+									   with window grid and entrance, stroke weight matched
+									   to the other topic icons. */
+									<svg
+										viewBox="0 0 24 24"
+										fill="none"
+										stroke="currentColor"
+										stroke-width="2"
+										stroke-linecap="round"
+										stroke-linejoin="round"
+									>
+										<rect x="4" y="2" width="16" height="20" rx="1" />
+										<line x1="9" y1="6" x2="9" y2="6.01" />
+										<line x1="15" y1="6" x2="15" y2="6.01" />
+										<line x1="9" y1="10" x2="9" y2="10.01" />
+										<line x1="15" y1="10" x2="15" y2="10.01" />
+										<line x1="9" y1="14" x2="9" y2="14.01" />
+										<line x1="15" y1="14" x2="15" y2="14.01" />
+										<path d="M10 22v-4h4v4" />
+									</svg>
 								) : (
 									/* Robot icon — stroke-based outline matching the visual
 									   weight of Starlight's other topic icons (laptop, book,
@@ -148,7 +170,7 @@ const CUSTOM_TOPIC_ICONS: Record<string, true> = {
 		display: flex;
 		align-items: center;
 		gap: 0.5rem;
-		padding: 0 0.125rem;
+		padding: 0 0.25rem;
 		font-size: var(--sl-text-sm);
 		font-weight: 500;
 		/* `1.25` is just enough to clear Inter's natural ascent + descent

src/sidebar.ts

@@ -516,9 +516,9 @@ export const sidebarTopics: StarlightSidebarTopicsUserConfig = [
 			],
 		},
 		{
-			label: 'Enterprise',
-			link: '/enterprise/',
-			icon: 'star',
+		label: 'Enterprise',
+		link: '/enterprise/',
+		icon: 'setting',
 			items: [
 				{
 					label: 'Getting started',
@@ -564,10 +564,10 @@ export const sidebarTopics: StarlightSidebarTopicsUserConfig = [
 			],
 		},
 		{
-			id: 'guides',
-			label: 'Guides',
-			link: '/guides/',
-			icon: 'puzzle',
+		id: 'guides',
+		label: 'Guides',
+		link: '/guides/',
+		icon: 'rocket',
 			items: [
 				{ slug: 'guides', label: 'Guides' },
 				{