Unable to add any api keys on linux version

### Variant

worldmonitor.app (Full / Geopolitical)

### Affected area

AI Insights / World Brief

### Bug description

Everytime I'm trying to add any api key, its giving the following error:

Save failed: Failed to write vault: Platform secure storage failure: DBus error: The name is not activatable

OS: Arch Linux

DE: Hyprland

WM: wayland

### Steps to reproduce

1. Open application.
2. Go to settings -> AI & Summarization
3. Add Any of the three api keys
4. Click save and close.

### Expected behavior

Expect it to just add and save the keys.

### Screenshots / Console errors

_No response_

### Browser & OS

Arch linux With hyprland.

Start by reproducing the failure on Arch Linux with Hyprland and inspect the AI & Summarization settings flow where API keys are saved. Trace the platform secure-storage path behind the “Failed to write vault” and DBus error; done means all three API keys can be saved and remain available after closing and reopening the application.

Written by the indexing model from the issue text.