Fix SSH password authentication logic by removing requirePassword field

This commit eliminates the confusing requirePassword field that was causing
authentication issues where users couldn't disable password requirements.

Changes:
- Remove requirePassword field from database schema and migrations
- Simplify SSH authentication logic by removing special case branches
- Update frontend to remove requirePassword UI controls
- Clean up translation files to remove unused strings
- Support standard SSH empty password authentication

The new design follows the principle of "good taste" - password field itself
now expresses the requirement: null/empty = no password auth, value = use password.

Fixes the issue where setting requirePassword=false didn't work as expected.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/ui/Desktop/Apps/Host Manager/HostManagerEditor.tsx

@@ -45,7 +45,6 @@ interface SSHHost {
   pin: boolean;
   authType: string;
   password?: string;
-  requirePassword?: boolean;
   key?: string;
   keyPassword?: string;
   keyType?: string;
@@ -173,7 +172,6 @@ export function HostManagerEditor({
       authType: z.enum(["password", "key", "credential"]),
       credentialId: z.number().optional().nullable(),
       password: z.string().optional(),
-      requirePassword: z.boolean().default(true),
       key: z.any().optional().nullable(),
       keyPassword: z.string().optional(),
       keyType: z
@@ -207,18 +205,7 @@ export function HostManagerEditor({
       defaultPath: z.string().optional(),
     })
     .superRefine((data, ctx) => {
-      if (data.authType === "password") {
-        if (
-          data.requirePassword &&
-          (!data.password || data.password.trim() === "")
-        ) {
-          ctx.addIssue({
-            code: z.ZodIssueCode.custom,
-            message: t("hosts.passwordRequired"),
-            path: ["password"],
-          });
-        }
-      } else if (data.authType === "key") {
+      if (data.authType === "key") {
         if (
           !data.key ||
           (typeof data.key === "string" && data.key.trim() === "")
@@ -279,7 +266,6 @@ export function HostManagerEditor({
       authType: "password" as const,
       credentialId: null,
       password: "",
-      requirePassword: true,
       key: null,
       keyPassword: "",
       keyType: "auto" as const,
@@ -336,7 +322,6 @@ export function HostManagerEditor({
         authType: defaultAuthType as "password" | "key" | "credential",
         credentialId: null,
         password: "",
-        requirePassword: cleanedHost.requirePassword ?? true,
         key: null,
         keyPassword: "",
         keyType: "auto" as const,
@@ -372,7 +357,6 @@ export function HostManagerEditor({
         authType: "password" as const,
         credentialId: null,
         password: "",
-        requirePassword: true,
         key: null,
         keyPassword: "",
         keyType: "auto" as const,
@@ -879,24 +863,6 @@ export function HostManagerEditor({
                     </TabsTrigger>
                   </TabsList>
                   <TabsContent value="password">
-                    <FormField
-                      control={form.control}
-                      name="requirePassword"
-                      render={({ field }) => (
-                        <FormItem className="mb-4">
-                          <FormLabel>{t("hosts.requirePassword")}</FormLabel>
-                          <FormControl>
-                            <Switch
-                              checked={field.value}
-                              onCheckedChange={field.onChange}
-                            />
-                          </FormControl>
-                          <FormDescription>
-                            {t("hosts.requirePasswordDescription")}
-                          </FormDescription>
-                        </FormItem>
-                      )}
-                    />
                     <FormField
                       control={form.control}
                       name="password"
@@ -906,7 +872,6 @@ export function HostManagerEditor({
                           <FormControl>
                             <PasswordInput
                               placeholder={t("placeholders.password")}
-                              disabled={!form.watch("requirePassword")}
                               {...field}
                             />
                           </FormControl>