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/SettingsView.tsx

@@ -1,4 +1,4 @@
-import type { ReactNode } from 'react';
+import type { FormEvent, ReactNode } from 'react';
 import { useState } from 'react';
 import { Loader2, Plug, ShieldCheck } from 'lucide-react';
 import { Button } from '@/components/ui/button';
@@ -45,7 +45,8 @@ export const SettingsView = () => {
 
   const dirty = Object.keys(draft).length > 0;
 
-  const apply = async () => {
+  const apply = async (ev?: FormEvent) => {
+    ev?.preventDefault();
     await save.mutateAsync(draft);
     setDraft({});
   };
@@ -80,7 +81,7 @@ export const SettingsView = () => {
   );
 
   return (
-    <div className="flex h-full min-h-0 flex-col">
+    <form onSubmit={apply} className="flex h-full min-h-0 flex-col">
       <Tabs defaultValue="download" className="flex min-h-0 flex-1 flex-col">
         <TabsList className="mx-4 mt-3 w-fit shrink-0">
           <TabsTrigger value="download">Downloads</TabsTrigger>
@@ -167,7 +168,13 @@ export const SettingsView = () => {
               {bool('peer-port-random-on-start', 'Pick a random port on each start')}
               {bool('port-forwarding-enabled', 'Ask the router to forward it (UPnP / NAT-PMP)')}
               <div>
-                <Button size="sm" variant="outline" onClick={() => portTest.mutate()} disabled={portTest.isPending}>
+                <Button
+                  type="button"
+                  size="sm"
+                  variant="outline"
+                  onClick={() => portTest.mutate()}
+                  disabled={portTest.isPending}
+                >
                   {portTest.isPending ? (
                     <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" />
                   ) : (
@@ -207,6 +214,7 @@ export const SettingsView = () => {
               {text('blocklist-url', 'Blocklist URL')}
               <div className="flex items-center gap-3">
                 <Button
+                  type="button"
                   size="sm"
                   variant="outline"
                   onClick={() => updateBlocklist.mutate()}
@@ -284,16 +292,16 @@ export const SettingsView = () => {
           <span className="flex-1 text-xs text-muted-foreground">
             {Object.keys(draft).length} unsaved change{Object.keys(draft).length === 1 ? '' : 's'}
           </span>
-          <Button size="sm" variant="ghost" onClick={() => setDraft({})}>
+          <Button type="button" size="sm" variant="ghost" onClick={() => setDraft({})}>
             Discard
           </Button>
-          <Button size="sm" onClick={apply} disabled={save.isPending}>
+          <Button type="submit" size="sm" disabled={save.isPending}>
             {save.isPending && <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" />}
             Save
           </Button>
         </div>
       )}
-    </div>
+    </form>
   );
 };