Fix autocomplete issues in change password form (#7812)

## Screenshots

<details>
<summary>Before</summary>

<img width="773" height="652" alt="image" src="https://github.com/user-attachments/assets/89a0e58c-8c4a-41ff-b5d6-3e916079d563" />

</details>

<details>
<summary>After</summary>

<img width="1006" height="646" alt="image" src="https://github.com/user-attachments/assets/f4575103-7365-4870-a170-2742bf10eb27" />

</details>

This is an example on Firefox, where the `Master authentication token` field was incorrectly being autofilled.
Red borders are indicating that the fields are required.

## List of changes

* `required="required"` is now being added to the password fields if the section is open
* The `challenge` field is being added if section is open instead of when at least one of the password fields isn't empty due to autocomplete
* Added `autocomplete="new-password"` on fields that shouldn't be autocompleted
   * Unfortunately Chrome requires a workaround with CSS
   * Not tested on Safari yet
* User will be redirected to profile page after successfully changing their password instead of index page

## How to test

Autocomplete related changes should be tested on a HTTPS page with saved credentials for FreshRSS

2 files changed, 14 insertions, 0 deletions

diff --git a/p/themes/base-theme/frss.css b/p/themes/base-theme/frss.css
index b2cea940f..48c8147e3 100644
--- a/p/themes/base-theme/frss.css
+++ b/p/themes/base-theme/frss.css
@@ -530,6 +530,13 @@ input#favicon-upload {
 	display: inline;
 }
 
+input.ignore-auto-complete {
+	position: absolute;
+	left: -9999px;
+	pointer-events: none;
+	user-select: none;
+}
+
 /*=== Buttons */
 button[disabled] {
 	opacity: 0.5;
diff --git a/p/themes/base-theme/frss.rtl.css b/p/themes/base-theme/frss.rtl.css
index 0ed592a41..e1cc66066 100644
--- a/p/themes/base-theme/frss.rtl.css
+++ b/p/themes/base-theme/frss.rtl.css
@@ -530,6 +530,13 @@ input#favicon-upload {
 	display: inline;
 }
 
+input.ignore-auto-complete {
+	position: absolute;
+	right: -9999px;
+	pointer-events: none;
+	user-select: none;
+}
+
 /*=== Buttons */
 button[disabled] {
 	opacity: 0.5;