ledger: tell the truth on Platform API remove confirm

Agent rows already got an honest confirm-expansion ("Removing forgets
this agent from the ledger; history is retained…") plus uninstall
commands as a courtesy. Platform API rows (PVE / PBS / PMG / VMware /
TrueNAS) had nothing beyond "Click again to confirm," which left two
honest questions unanswered:

- Does this delete my history? (No — history is retained in v1.)
- Does this log me out of the platform itself? (No — credentials on
  the platform side are untouched.)

Add a parallel expansion for non-agent rows that answers both directly.
Matches the plan's "user-facing copy in Remove dialog must be explicit"
note and keeps honesty symmetric between Agent and Platform API rows.

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

@@ -219,6 +219,18 @@ export const ConnectionsTable: Component<ConnectionsTableProps> = (props) => {
                       </TableRow>
                     </Show>
 
+                    <Show when={!row.isAgent && isConfirmingRemove()}>
+                      <TableRow>
+                        <TableCell colspan={colSpan()} class="bg-surface-alt px-4 pb-3 pt-1">
+                          <p class="text-xs text-muted">
+                            Removing forgets this connection from Pulse; history is retained.
+                            Credentials on the platform itself are untouched — revoke them there
+                            separately if you want to invalidate access.
+                          </p>
+                        </TableCell>
+                      </TableRow>
+                    </Show>
+
                     <Show when={row.isAgent && isConfirmingRemove() && props.agentUninstallCommands}>
                       <TableRow>
                         <TableCell colspan={colSpan()} class="bg-surface-alt px-4 pb-4 pt-1">

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

@@ -190,6 +190,27 @@ describe('ConnectionsTable', () => {
     expect(screen.queryByRole('button', { name: 'Remove' })).toBeNull();
   });
 
+  it('tells the truth on Platform API remove confirm: history retained, platform untouched', () => {
+    const actions = makeActions({ confirmingRemove: () => true });
+    const pveConnection = connectionFixture({
+      id: 'pve:zeus',
+      type: 'pve',
+      name: 'zeus',
+    });
+    render(() => (
+      <ConnectionsTable
+        rows={() => [row({ connection: pveConnection, isAgent: false })]}
+        actions={actions}
+        onEdit={vi.fn()}
+      />
+    ));
+
+    expect(screen.getByText(/history is retained/i)).toBeInTheDocument();
+    expect(screen.getByText(/Credentials on the platform itself are untouched/i)).toBeInTheDocument();
+    // No uninstall block for Platform API rows — only agents get that courtesy.
+    expect(screen.queryByText(/--uninstall/)).toBeNull();
+  });
+
   it('reveals the agent uninstall commands while confirming removal of an agent row', () => {
     const actions = makeActions({ confirmingRemove: () => true });
     const agentConnection = connectionFixture({