make the connection settings reachable at /gitea/connection

The form appeared only when nothing was configured, so once a token was saved
there was no way back to it — a member who mistyped theirs, or anyone rotating
one, had nowhere to go. On a single-user machine that is an annoyance; on a
company one it is the ordinary case, because every member has a token of their
own to set.

Uses the route pair the platform already generates for every plugin, so this
needed no platform change. A plug icon beside the open-in-new-tab button, as a
real Link rather than a button, because it is navigation and should be
cmd-clickable.

Saving returns to the frame — otherwise you are left looking at the form you
just submitted, which reads as nothing having happened.

The two halves were already right: the panel shows only the token field when
isOwner is false, and getResolvedServiceCredentials gives a member the owner's
URL with their OWN secret, never the owner's.

web/GiteaConnection.tsx

@@ -1,4 +1,5 @@
 import { useState } from 'react';
+import { useNavigate } from 'react-router';
 import { Loader2 } from 'lucide-react';
 import { useClient } from 'hooks/useClient';
 import { Button } from '@/components/ui/button';
@@ -34,6 +35,7 @@ type Props = { state: ConnectionState; onSaved: () => void };
 
 export const GiteaConnection = ({ state, onSaved }: Props) => {
   const { put } = useClient();
+  const navigate = useNavigate();
   // Loopback is the right default and worth putting in front of someone: the sidecar fetches
   // SERVER-SIDE, so `localhost` means the machine Officer runs on. It needs no TLS and never leaves the
   // box — where the public URL would take the same traffic out and back.
@@ -48,6 +50,9 @@ export const GiteaConnection = ({ state, onSaved }: Props) => {
     try {
       await put('/gitea/_config', state.isOwner === false ? { token } : { url, token });
       onSaved();
+      // Back to the frame. Saving from `/gitea/connection` otherwise leaves you looking at the form you
+      // just submitted, which reads as nothing having happened.
+      navigate('/gitea');
     } catch (err) {
       setError(err instanceof Error ? err.message : 'could not save');
     } finally {
@@ -91,10 +96,18 @@ export const GiteaConnection = ({ state, onSaved }: Props) => {
 
       {error && <p className="text-xs text-destructive">{error}</p>}
 
-      <Button onClick={save} disabled={busy || ((!state.configured || state.unreadable) && !token)}>
-        {busy ? <Loader2 className="mr-2 h-3.5 w-3.5 animate-spin" /> : null}
-        {state.configured ? 'Save' : 'Connect'}
-      </Button>
+      <div className="flex gap-2">
+        <Button onClick={save} disabled={busy || ((!state.configured || state.unreadable) && !token)}>
+          {busy ? <Loader2 className="mr-2 h-3.5 w-3.5 animate-spin" /> : null}
+          {state.configured ? 'Save' : 'Connect'}
+        </Button>
+        {/* Only once there is something to go back TO. */}
+        {state.configured && !state.unreadable ? (
+          <Button variant="outline" onClick={() => navigate('/gitea')} disabled={busy}>
+            Cancel
+          </Button>
+        ) : null}
+      </div>
     </div>
   );
 };

web/GiteaFrame.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useState } from 'react';
-import { ExternalLink, Loader2, TriangleAlert } from 'lucide-react';
+import { Link, useParams } from 'react-router';
+import { ExternalLink, Loader2, Plug, TriangleAlert } from 'lucide-react';
 import { useClient } from 'hooks/useClient';
 import { Button } from '@/components/ui/button';
 import { GiteaConnection, type ConnectionState } from './GiteaConnection';
@@ -25,6 +26,11 @@ import { GiteaConnection, type ConnectionState } from './GiteaConnection';
 const FRAME_SRC = '/api/gitea/_web/';
 
 export const GiteaFrame = () => {
+  // `/gitea/connection` renders the settings instead of the frame. The plugin route pair gives this for
+  // free — `<route>` and `<route>/:section` are generated for every plugin — and it is the only way to
+  // change a token once one is set: the form used to appear ONLY when nothing was configured, so a
+  // member who mistyped theirs, or anyone rotating one, had nowhere to go.
+  const { section } = useParams();
   const { get, post } = useClient();
   const [state, setState] = useState<'opening' | 'ready' | 'failed'>('opening');
   const [connection, setConnection] = useState<ConnectionState | null>(null);
@@ -83,7 +89,8 @@ export const GiteaFrame = () => {
     );
   }
 
-  if (connection && !connection.configured) {
+  // Unconfigured goes straight to the form; `/gitea/connection` opens it deliberately.
+  if (connection && (!connection.configured || section === 'connection')) {
     return <GiteaConnection state={connection} onSaved={() => setAttempt((n) => n + 1)} />;
   }
 
@@ -92,15 +99,22 @@ export const GiteaFrame = () => {
       {/* The escape hatch, and it is not an admission of defeat: the whole point of proxying an app that
           already has a UI is that its own UI stays available. Anything the frame handles badly, this
           opens properly. */}
-      <Button
-        size="sm"
-        variant="outline"
-        className="absolute right-3 top-3 z-10 opacity-60 hover:opacity-100"
-        onClick={() => window.open(FRAME_SRC, '_blank', 'noopener')}
-        title="Open Gitea in a new tab"
-      >
-        <ExternalLink className="h-3.5 w-3.5" />
-      </Button>
+      <div className="absolute right-3 top-3 z-10 flex gap-1.5 opacity-60 transition-opacity hover:opacity-100">
+        {/* A real link, not a button: it is navigation, and it should be cmd-clickable like any other. */}
+        <Button size="sm" variant="outline" asChild title="Connection settings">
+          <Link to="/gitea/connection">
+            <Plug className="h-3.5 w-3.5" />
+          </Link>
+        </Button>
+        <Button
+          size="sm"
+          variant="outline"
+          onClick={() => window.open(FRAME_SRC, '_blank', 'noopener')}
+          title="Open Gitea in a new tab"
+        >
+          <ExternalLink className="h-3.5 w-3.5" />
+        </Button>
+      </div>
       <iframe
         src={FRAME_SRC}
         title="Gitea"