feat(site): promote AI settings to a top-level section (#25582)

> 🤖 This PR was written by Coder Agents on behalf of Jake Howell.

Linear: [DEVEX-355](https://linear.app/coder/issue/DEVEX-355)

Fifth and final PR in a 5-PR stack splitting #25328. Surfaces the AI
settings section in the dashboard chrome and moves the existing AI
Governance page out of `/deployment`.

- `Navbar` / `NavbarView` / `DeploymentDropdown` gain a
`canViewAISettings` prop sourced from the `viewAnyAIProvider` permission
added in PR 2. The deployment dropdown gets a new AI entry that links to
`/ai/settings`.
- `DeploymentSidebarView` drops the AI-related entries that now live
under `/ai/settings`.
- `AISettingsSidebarView` expands to include AI Governance and a
cross-section link to Manage Coder Agents.
- `router.tsx` removes the `/deployment/ai-governance` route and mounts
the matching `/ai/settings/governance` child route under the new AI
settings layout.
- `ChatsSidebar` settings panel repoints the Providers link from
`/deployment/ai-providers` to `/ai/settings`.

<details>
<summary>Stack</summary>

1. #25579 jakehwll/DEVEX-355/01-primitives, primitives
2. #25580 jakehwll/DEVEX-355/02-api, API client and query layer
3. #25581 jakehwll/DEVEX-355/03-components, provider form components
4. #25583 jakehwll/DEVEX-355/04-pages, pages and routes
5. **jakehwll/DEVEX-355/05-section, section reshuffle (this PR)**

Replaces #25328 once the stack lands.
</details>

site/src/modules/dashboard/Navbar/DeploymentDropdown.tsx

@@ -15,8 +15,9 @@ interface DeploymentDropdownProps {
 	canViewOrganizations: boolean;
 	canViewAuditLog: boolean;
 	canViewConnectionLog: boolean;
-	canViewHealth: boolean;
 	canViewAIBridge: boolean;
+	canViewAISettings: boolean;
+	canViewHealth: boolean;
 }
 
 export const DeploymentDropdown: FC<DeploymentDropdownProps> = ({
@@ -24,16 +25,18 @@ export const DeploymentDropdown: FC<DeploymentDropdownProps> = ({
 	canViewOrganizations,
 	canViewAuditLog,
 	canViewConnectionLog,
-	canViewHealth,
 	canViewAIBridge,
+	canViewAISettings,
+	canViewHealth,
 }) => {
 	if (
 		!canViewAuditLog &&
 		!canViewConnectionLog &&
 		!canViewDeployment &&
 		!canViewOrganizations &&
-		!canViewHealth &&
-		!canViewAIBridge
+		!canViewAIBridge &&
+		!canViewAISettings &&
+		!canViewHealth
 	) {
 		return null;
 	}
@@ -53,8 +56,9 @@ export const DeploymentDropdown: FC<DeploymentDropdownProps> = ({
 					canViewOrganizations={canViewOrganizations}
 					canViewAuditLog={canViewAuditLog}
 					canViewConnectionLog={canViewConnectionLog}
-					canViewHealth={canViewHealth}
 					canViewAIBridge={canViewAIBridge}
+					canViewAISettings={canViewAISettings}
+					canViewHealth={canViewHealth}
 				/>
 			</DropdownMenuContent>
 		</DropdownMenu>
@@ -64,9 +68,10 @@ export const DeploymentDropdown: FC<DeploymentDropdownProps> = ({
 const DeploymentDropdownContent: FC<DeploymentDropdownProps> = ({
 	canViewDeployment,
 	canViewAuditLog,
-	canViewHealth,
 	canViewConnectionLog,
 	canViewAIBridge,
+	canViewAISettings,
+	canViewHealth,
 }) => {
 	return (
 		<nav>
@@ -78,6 +83,11 @@ const DeploymentDropdownContent: FC<DeploymentDropdownProps> = ({
 			<DropdownMenuItem asChild>
 				<Link to="/organizations">Organizations</Link>
 			</DropdownMenuItem>
+			{canViewAISettings && (
+				<DropdownMenuItem asChild>
+					<Link to="/ai/settings">AI</Link>
+				</DropdownMenuItem>
+			)}
 			{canViewAuditLog && (
 				<DropdownMenuItem asChild>
 					<Link to={linkToAuditing}>Audit Logs</Link>

site/src/modules/dashboard/Navbar/Navbar.tsx

@@ -27,6 +27,7 @@ export const Navbar: FC = () => {
 		featureVisibility.connection_log && permissions.viewAnyConnectionLog;
 	const canViewAIBridge =
 		featureVisibility.aibridge && permissions.viewAnyAIBridgeInterception;
+	const canViewAISettings = permissions.viewAnyAIProvider;
 	const canCreateChat = permissions.createChat;
 
 	const uniqueLinks = new Map<string, LinkConfig>();
@@ -47,6 +48,7 @@ export const Navbar: FC = () => {
 			canViewAuditLog={canViewAuditLog}
 			canViewConnectionLog={canViewConnectionLog}
 			canViewAIBridge={canViewAIBridge}
+			canViewAISettings={canViewAISettings}
 			canCreateChat={canCreateChat}
 			proxyContextValue={proxyContextValue}
 		/>

site/src/modules/dashboard/Navbar/NavbarView.stories.tsx

@@ -33,6 +33,7 @@ const meta: Meta<typeof NavbarView> = {
 		canViewAuditLog: true,
 		canViewDeployment: true,
 		canViewHealth: true,
+		canViewAISettings: true,
 		canViewOrganizations: true,
 		canCreateChat: true,
 		supportLinks: [],
@@ -58,6 +59,7 @@ export const ForAuditor: Story = {
 		canViewAuditLog: true,
 		canViewDeployment: false,
 		canViewHealth: false,
+		canViewAISettings: false,
 		canViewOrganizations: false,
 	},
 	play: async ({ canvasElement }) => {
@@ -74,6 +76,7 @@ export const ForOrgAdmin: Story = {
 		canViewAuditLog: true,
 		canViewDeployment: false,
 		canViewHealth: false,
+		canViewAISettings: false,
 		canViewOrganizations: true,
 	},
 	play: async ({ canvasElement }) => {
@@ -90,6 +93,7 @@ export const ForSingleOrgOSSAdmin: Story = {
 		canViewOrganizations: false,
 		canViewConnectionLog: false,
 		canViewAIBridge: false,
+		canViewAISettings: false,
 	},
 	play: async ({ canvasElement }) => {
 		const canvas = within(canvasElement);
@@ -105,6 +109,7 @@ export const ForMember: Story = {
 		canViewAuditLog: false,
 		canViewDeployment: false,
 		canViewHealth: false,
+		canViewAISettings: false,
 		canViewOrganizations: false,
 		canCreateChat: false,
 	},
@@ -116,6 +121,7 @@ export const ForMemberWithAgentsAccess: Story = {
 		canViewAuditLog: false,
 		canViewDeployment: false,
 		canViewHealth: false,
+		canViewAISettings: false,
 		canViewOrganizations: false,
 		canCreateChat: true,
 	},
@@ -138,6 +144,7 @@ export const SupportLinks: Story = {
 		canViewAuditLog: false,
 		canViewDeployment: false,
 		canViewHealth: false,
+		canViewAISettings: false,
 		canViewOrganizations: false,
 		supportLinks: [
 			{
@@ -178,6 +185,7 @@ export const DefaultSupportLinks: Story = {
 		canViewAuditLog: false,
 		canViewDeployment: false,
 		canViewHealth: false,
+		canViewAISettings: false,
 		canViewOrganizations: false,
 		supportLinks: [
 			{ icon: "docs", name: "Documentation", target: "" },

site/src/modules/dashboard/Navbar/NavbarView.tsx

@@ -33,6 +33,7 @@ interface NavbarViewProps {
 	canViewConnectionLog: boolean;
 	canViewHealth: boolean;
 	canViewAIBridge: boolean;
+	canViewAISettings: boolean;
 	canCreateChat: boolean;
 	proxyContextValue?: ProxyContextValue;
 }
@@ -54,6 +55,7 @@ export const NavbarView: FC<NavbarViewProps> = ({
 	canViewAuditLog,
 	canViewConnectionLog,
 	canViewAIBridge,
+	canViewAISettings,
 	canCreateChat,
 	proxyContextValue,
 }) => {
@@ -128,9 +130,10 @@ export const NavbarView: FC<NavbarViewProps> = ({
 						canViewAuditLog={canViewAuditLog}
 						canViewOrganizations={canViewOrganizations}
 						canViewDeployment={canViewDeployment}
-						canViewHealth={canViewHealth}
 						canViewConnectionLog={canViewConnectionLog}
 						canViewAIBridge={canViewAIBridge}
+						canViewAISettings={canViewAISettings}
+						canViewHealth={canViewHealth}
 					/>
 				</div>
 

site/src/modules/management/AISettingsSidebar.tsx

@@ -1,8 +1,11 @@
+import type { FC } from "react";
+import { useAuthenticated } from "#/hooks/useAuthenticated";
 import AISettingsSidebarView from "#/modules/management/AISettingsSidebarView";
 
 /**
  * A sidebar for AI settings.
  */
-export const AISettingsSidebar: React.FC = () => {
-	return <AISettingsSidebarView />;
+export const AISettingsSidebar: FC = () => {
+	const { permissions } = useAuthenticated();
+	return <AISettingsSidebarView permissions={permissions} />;
 };

site/src/modules/management/AISettingsSidebarView.tsx

@@ -1,13 +1,35 @@
+import { ArrowUpRightIcon } from "lucide-react";
+import type { FC } from "react";
 import {
 	Sidebar as BaseSidebar,
 	SettingsSidebarNavItem as SidebarNavItem,
 } from "#/components/Sidebar/Sidebar";
+import type { Permissions } from "#/modules/permissions";
 
-const AISettingsSidebarView: React.FC = () => {
+interface AISettingsSidebarViewProps {
+	/** Site-wide permissions. */
+	permissions: Permissions;
+}
+
+const AISettingsSidebarView: FC<AISettingsSidebarViewProps> = ({
+	permissions,
+}) => {
 	return (
 		<BaseSidebar>
 			<div className="flex flex-col gap-1">
+				{permissions.viewDeploymentConfig && (
+					<SidebarNavItem href="/ai/settings/governance">
+						AI Governance
+					</SidebarNavItem>
+				)}
 				<SidebarNavItem href="/ai/settings">Providers</SidebarNavItem>
+				{permissions.editDeploymentConfig && (
+					<SidebarNavItem href="/agents/settings/agents">
+						<div className="flex flex-row items-center gap-1">
+							Manage Coder Agents <ArrowUpRightIcon size={16} />
+						</div>
+					</SidebarNavItem>
+				)}
 			</div>
 		</BaseSidebar>
 	);

site/src/modules/management/DeploymentSidebarView.tsx

@@ -75,11 +75,7 @@ export const DeploymentSidebarView: FC<DeploymentSidebarViewProps> = ({
 						Observability
 					</SidebarNavItem>
 				)}
-				{permissions.viewDeploymentConfig && (
-					<SidebarNavItem href="/deployment/ai-governance">
-						AI Governance
-					</SidebarNavItem>
-				)}
+
 				{permissions.viewAllUsers && (
 					<SidebarNavItem href="/deployment/users">Users</SidebarNavItem>
 				)}
@@ -105,13 +101,6 @@ export const DeploymentSidebarView: FC<DeploymentSidebarViewProps> = ({
 				{!hasPremiumLicense && (
 					<SidebarNavItem href="/deployment/premium">Premium</SidebarNavItem>
 				)}
-				{permissions.editDeploymentConfig && (
-					<SidebarNavItem href="/agents/settings/agents">
-						<div className="flex flex-row items-center gap-1">
-							Manage Coder Agents <ArrowUpRightIcon size={16} />
-						</div>
-					</SidebarNavItem>
-				)}
 			</div>
 		</BaseSidebar>
 	);

site/src/pages/AgentsPage/components/ChatsSidebar/settings/SettingsPanel.tsx

@@ -1,5 +1,6 @@
 import {
 	ArrowLeftIcon,
+	ArrowUpRightIcon,
 	BotIcon,
 	BoxesIcon,
 	ChevronRightIcon,
@@ -165,9 +166,9 @@ export const SettingsPanel: FC<SettingsPanelProps> = ({
 					<SettingsNavItem
 						icon={PlugIcon}
 						label="Providers"
-						active={settingsSection === "providers"}
-						to="/agents/settings/providers"
-						state={location.state}
+						active={false}
+						to="/ai/settings"
+						trailingIcon={ArrowUpRightIcon}
 					/>
 					<SettingsNavItem
 						icon={BoxesIcon}

site/src/router.tsx

@@ -600,10 +600,7 @@ export const router = createBrowserRouter(
 								path="observability"
 								element={<ObservabilitySettingsPage />}
 							/>
-							<Route
-								path="ai-governance"
-								element={<AIGovernanceSettingsPage />}
-							/>
+
 							<Route path="network" element={<NetworkSettingsPage />} />
 							<Route path="userauth" element={<UserAuthSettingsPage />} />
 							<Route
@@ -698,6 +695,9 @@ export const router = createBrowserRouter(
 					</Route>
 
 					<Route path="/ai/settings" element={<AISettingsLayout />}>
+						<Route element={<DeploymentConfigProvider />}>
+							<Route path="governance" element={<AIGovernanceSettingsPage />} />
+						</Route>
 						<Route index element={<AISettingsProvidersPage />} />
 						<Route path="add" element={<AISettingsAddProviderPage />} />
 						<Route