[Explore Vis] Date String Normalization

[lunalzm]

Description

Currently, time fields in the result set may appear as plain strings (e.g., "2025-09-24 14:50:00") without timezone information.
As a result, visualizations always display them in UTC, and the times do not adjust according to the system timezone settings (e.g., UTC+8).

Screenshot

Before

After

Changelog

• feat: Date String Normalization

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 60.20%. Comparing base (b5300dc) to head (f80b41b).

Files with missing lines	Patch %	Lines
...on/utils/state_management/actions/query_actions.ts	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10574      +/-   ##
==========================================
- Coverage   60.20%   60.20%   -0.01%     
==========================================
  Files        4302     4302              
  Lines      115109   115111       +2     
  Branches    18695    18696       +1     
==========================================
- Hits        69299    69298       -1     
- Misses      41057    41058       +1     
- Partials     4753     4755       +2     

Flag	Coverage Δ
Linux_1	26.66% <ø> (ø)
Linux_2	38.82% <ø> (ø)
Linux_3	37.82% <ø> (-0.01%)	⬇️
Linux_4	32.62% <50.00%> (+<0.01%)	⬆️
Windows_1	26.67% <ø> (ø)
Windows_2	38.80% <ø> (ø)
Windows_3	37.82% <ø> (ø)
Windows_4	32.62% <50.00%> (+<0.01%)	⬆️

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