[#700] Add Page Limit Input and Improve Case-Insensitive DAG Search

[yohamta]

This PR addresses #700 by improving the UI

• Page Limit Input: Added a text box for setting the page limit
• Case-Insensitive Search: Updated the DAG name search to be case-insensitive

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 62.03%. Comparing base (6801654) to head (e690a19).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/persistence/local/dag_store.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #702      +/-   ##
==========================================
+ Coverage   61.97%   62.03%   +0.05%     
==========================================
  Files          53       53              
  Lines        5228     5228              
==========================================
+ Hits         3240     3243       +3     
+ Misses       1734     1732       -2     
+ Partials      254      253       -1     

Files with missing lines	Coverage Δ
internal/persistence/local/dag_store.go	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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