fix: command palette shows raw i18n keys for several entries

[ankittroy-21]

Description

The command palette ("Go to page or run an action...") shows raw translation keys instead of actual labels for several navigation and action entries. It looks like the command_palette.* namespace is missing or incomplete in the locale file, so the app falls back to showing the keys themselves for those entries.

Steps to reproduce

1. Open OmniGet v0.8.1 (Windows, x64)
2. Open the command palette (search / Ctrl+K)
3. Observe the list of navigation and action entries

Expected behavior

All entries should show proper labels, e.g. "Home," "Downloads," "Settings," "Marketplace," "About," and an appropriate label for the prefill action — instead of raw keys.

Actual behavior

The following entries show raw translation keys as literal text instead of translated strings:

• command_palette.nav_home
• command_palette.nav_downloads
• command_palette.nav_settings
• command_palette.nav_marketplace
• command_palette.nav_about
• command_palette.action_prefill

Notably, two other entries in the same list — "Open downloads" and "Open settings" — display correctly, which suggests only specific keys under the command_palette namespace are missing or unregistered, not the whole namespace.

Environment

• OmniGet version: v0.8.1 (omniget_0.8.1_x64-portable.exe)
• OS: Windows
• Language setting: English (ENG/IN)

Screenshot

Additional notes

This looks like the same root cause as the previously reported Telegram plugin i18n issue — missing/unregistered keys in src/lib/i18n/en.json, likely from recently added features in this release. Possibly related or duplicate; linking both issues may help maintainers spot the pattern.