Improve Real-Time UI: Resizable Dashboard and Time Range Preservation

[cchwala]

This PR enhances the real-time monitoring interface with two key UX improvements:

Features

1. Resizable Grafana Dashboard: Added a draggable divider that allows users to adjust the dashboard height (200px minimum, 80% viewport maximum) for better viewing on different screen sizes.

2. Time Range Preservation: When selecting CMLs by clicking map lines, the Grafana dashboard now maintains the user's selected time range instead of resetting to the default 7-day view. Implemented using history.pushState for seamless updates without iframe reloads.

Technical Changes

• Migrated from flexbox to absolute positioning layout with the map as a full-height background layer
• Dashboard overlays from bottom with proper z-index layering
• Disabled iframe pointer events during resize operations to prevent event capture issues
• Cleaned up redundant CSS and removed unnecessary fallback logic

Testing

Tested on various screen sizes and verified:

• Smooth resizing in both directions
• Time range persists across CML selection
• No stuck states or visual artifacts
• Map interactions remain fully functional

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.40%. Comparing base (0970bc8) to head (c30de40).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #24   +/-   ##
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  Coverage   73.40%   73.40%           
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  Files          22       22           
  Lines        1914     1914           
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  Hits         1405     1405           
  Misses        509      509           

Flag	Coverage Δ
mno_simulator	87.87% <ø> (ø)
parser	81.21% <ø> (ø)
webserver	44.73% <ø> (ø)

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