Loading skeletons on dashboard route

[YaronZaki]

• Difficulty: good-first-issue · Effort: S · **Impact`: dashboard first paint
• Expected Outcome
  Skeleton components matching real layout. Replace on data arrival.
• **Files / Modules Affected`
  • frontend/src/pages/DashboardLayout.jsx
• **Dependencies`: standalone.

[MicD746]

hello please can i work on this issue

[grantfox-oss]

🦊 GrantFox — @MicD746 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #269)
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