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/MoveTorrentDialog.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 {
@@ -41,7 +42,8 @@ export const MoveTorrentDialog = ({ open, onOpenChange, targets, knownDirs }: Mo
     setMove(true);
   }, [open, targets]);
 
-  const submit = async () => {
+  const submit = async (ev?: FormEvent) => {
+    ev?.preventDefault();
     await setLocation.mutateAsync({ ids: targets.map((t) => t.id), location: location.trim(), move });
     onOpenChange(false);
   };
@@ -56,7 +58,7 @@ export const MoveTorrentDialog = ({ open, onOpenChange, targets, knownDirs }: Mo
           </DialogDescription>
         </DialogHeader>
 
-        <div className="space-y-4">
+        <form onSubmit={submit} className="space-y-4">
           <div className="space-y-1.5">
             <Label htmlFor="tr-move-path">Destination</Label>
             <Input
@@ -111,16 +113,16 @@ export const MoveTorrentDialog = ({ open, onOpenChange, targets, knownDirs }: Mo
               </span>
             </label>
           </div>
-        </div>
 
-        <DialogFooter>
-          <Button variant="ghost" onClick={() => onOpenChange(false)}>
-            Cancel
-          </Button>
-          <Button onClick={submit} disabled={!location.trim() || setLocation.isPending}>
-            Apply
-          </Button>
-        </DialogFooter>
+          <DialogFooter>
+            <Button type="button" variant="ghost" onClick={() => onOpenChange(false)}>
+              Cancel
+            </Button>
+            <Button type="submit" disabled={!location.trim() || setLocation.isPending}>
+              Apply
+            </Button>
+          </DialogFooter>
+        </form>
       </DialogContent>
     </Dialog>
   );