real forms across the plugin, so enter submits instead of doing nothing

connection settings, add/move/rename/options dialogs and daemon settings all
put their fields in a div, so the button was the only way to submit and enter
silently did nothing — a keyboard trap wearing a layout. wrapped each in a
<form onSubmit>, made every non-submit button in those forms type="button"
(test port, update blocklist, discard, cancel, remove-file, known-dir
shortcuts), and dropped RenameDialog's manual onKeyDown enter check now that
the form handles it natively. the toolbar's filter box is left alone — it has
no submit action.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

web/dialogs/TorrentOptionsDialog.tsx

@@ -1,4 +1,5 @@
 import type { Torrent } from '../shared';
+import type { FormEvent } from 'react';
 import { useEffect, useState } from 'react';
 import { Button } from '@/components/ui/button';
 import { Checkbox } from '@/components/ui/checkbox';
@@ -67,7 +68,8 @@ export const TorrentOptionsDialog = ({ open, onOpenChange, targets }: TorrentOpt
 
   const patch = (next: Partial<FormState>) => setForm((prev) => (prev ? { ...prev, ...next } : prev));
 
-  const submit = async () => {
+  const submit = async (ev?: FormEvent) => {
+    ev?.preventDefault();
     await set.mutateAsync({
       ids: targets.map((t) => t.id),
       bandwidthPriority: Number(form.bandwidthPriority),
@@ -98,7 +100,7 @@ export const TorrentOptionsDialog = ({ open, onOpenChange, targets }: TorrentOpt
           </DialogDescription>
         </DialogHeader>
 
-        <div className="space-y-5">
+        <form onSubmit={submit} className="space-y-5">
           <section className="space-y-3">
             <h3 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">Bandwidth</h3>
             <div className="grid grid-cols-2 gap-3">
@@ -206,16 +208,16 @@ export const TorrentOptionsDialog = ({ open, onOpenChange, targets }: TorrentOpt
               />
             </div>
           </section>
-        </div>
 
-        <DialogFooter>
-          <Button variant="ghost" onClick={() => onOpenChange(false)}>
-            Cancel
-          </Button>
-          <Button onClick={submit} disabled={set.isPending}>
-            Save
-          </Button>
-        </DialogFooter>
+          <DialogFooter>
+            <Button type="button" variant="ghost" onClick={() => onOpenChange(false)}>
+              Cancel
+            </Button>
+            <Button type="submit" disabled={set.isPending}>
+              Save
+            </Button>
+          </DialogFooter>
+        </form>
       </DialogContent>
     </Dialog>
   );