Rename "telemetry" to "metrics" in agent-facing copy

The word "telemetry" reads as vendor phone-home (especially since Pulse
has a separate, clearly-labelled "Anonymous outbound telemetry" system
on the server for usage pings). What the agent actually does is collect
host-level metrics that flow to the user's own Pulse deployment, with
no vendor endpoint.

Updated in three places to match:

- Explainer subhead and always-on chip ("Hardware metrics",
  "host-level metrics").
- Add-connection Unified Agent section ("Host-level metrics on
  Proxmox...").
- Matching assertion in ConnectionsExplainer.test.tsx plus a guard in
  ConnectionEditor.test.tsx that the old "host-level telemetry" copy
  does not come back.

Also:

- Strip the em dash from the Add-connection workspace subheader.
- Drop the redundant inner "Add a connection" heading now that the
  outer card already titles it "Add connection".

frontend-modern/src/components/Settings/ConnectionEditor/ConnectionEditor.tsx

@@ -77,14 +77,6 @@ export const ConnectionEditor: Component<ConnectionEditorProps> = (props) => {
         when={showCredentialSlot()}
         fallback={
           <div class="space-y-4 p-4">
-            <div>
-              <div class="text-sm font-semibold text-base-content">Add a connection</div>
-              <div class="mt-0.5 text-xs text-muted">
-                Paste a platform address to connect its API, or install the Unified Agent on a
-                host.
-              </div>
-            </div>
-
             <section class="space-y-3 rounded-md border border-border bg-surface-alt/30 p-3">
               <div>
                 <div class="text-xs font-semibold uppercase tracking-wide text-muted">
@@ -130,7 +122,7 @@ export const ConnectionEditor: Component<ConnectionEditorProps> = (props) => {
                   Pulse Unified Agent
                 </div>
                 <div class="text-[11px] text-muted">
-                  Host-level telemetry on Proxmox / VMware / TrueNAS, or the only path on
+                  Host-level metrics on Proxmox / VMware / TrueNAS, or the only path on
                   bare-metal Linux, Unraid, FreeBSD.
                 </div>
               </div>

frontend-modern/src/components/Settings/ConnectionEditor/__tests__/ConnectionEditor.test.tsx

@@ -107,6 +107,8 @@ describe('ConnectionEditor', () => {
     expect(
       screen.getByRole('button', { name: /install the unified agent on a host/i }),
     ).toBeInTheDocument();
+    expect(screen.getByText(/host-level metrics/i)).toBeInTheDocument();
+    expect(screen.queryByText(/host-level telemetry/i)).toBeNull();
   });
 
   it('routes the Install Unified Agent button straight to the agent credential slot', () => {

frontend-modern/src/components/Settings/ConnectionsExplainer.tsx

@@ -21,7 +21,7 @@ const persistDismissed = () => {
   }
 };
 
-const ALWAYS_ON_CAPABILITIES = ['Hardware telemetry'];
+const ALWAYS_ON_CAPABILITIES = ['Hardware metrics'];
 
 const OPT_IN_CAPABILITIES = ['Assistant commands', 'Patrol remediation'];
 
@@ -61,7 +61,7 @@ export const ConnectionsExplainer: Component = () => {
           </h3>
           <p class="mt-0.5 text-xs text-muted">
             The platform API covers workloads. The Unified Agent adds host-level
-            telemetry, and stands alone where there's no API.
+            metrics, and stands alone where there's no API.
           </p>
         </div>
 

frontend-modern/src/components/Settings/InfrastructureWorkspace.tsx

@@ -318,7 +318,7 @@ const InfrastructureWorkspaceContent: Component<InfrastructureWorkspaceProps> =
             <div>
               <div class="text-base font-semibold text-base-content">Add connection</div>
               <div class="mt-0.5 text-xs text-muted">
-                Paste an address — Pulse detects the product, you enter credentials, save.
+                Paste an address. Pulse detects the product, you enter credentials, and save.
               </div>
             </div>
             <button

frontend-modern/src/components/Settings/__tests__/ConnectionsExplainer.test.tsx

@@ -32,7 +32,7 @@ describe('ConnectionsExplainer', () => {
   it('surfaces concrete agent capabilities and trust facts users care about', () => {
     render(() => <ConnectionsExplainer />);
 
-    for (const capability of ['Hardware telemetry', 'Assistant commands', 'Patrol remediation']) {
+    for (const capability of ['Hardware metrics', 'Assistant commands', 'Patrol remediation']) {
       expect(screen.getByText(capability)).toBeInTheDocument();
     }
     for (const fact of ['Single Go binary', '~13 MB download', 'No runtime dependencies', 'Open source']) {