[FRONTEND] Add saved views for Findings and Reports filters

[utksh1]

Problem

SecuScan needs a production-grade improvement in this area: Power-user filtering workflow..

Scope

Allow users to save named filter/sort/date presets, restore them, rename/delete them, and persist locally or via backend if available.

Acceptance Criteria

• The implementation is focused and does not introduce unrelated UI, docs, lockfile, or formatting churn.
• Security-sensitive behavior has explicit negative tests where applicable.
• Existing tests continue to pass, and new tests cover the main success and failure paths.
• Documentation or configuration examples are updated when operator behavior changes.

Verification

Tests should cover create, apply, overwrite, delete, and invalid saved-view data.

Difficulty

Hard, useful issue intended for experienced contributors.

[khat190]

I'm a GSSoC contributor. Please Assign this to me. Thanks