feat: Improve ApiDashboard lifecycle management and context handling

[tangcent]

fix #1196

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 57.473%. Comparing base (8736f91) to head (3119c27).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...t/idea/plugin/api/dashboard/ApiDashboardService.kt	0.000%	13 Missing ⚠️
...dea/plugin/api/dashboard/ApiDashboardToolWindow.kt	0.000%	8 Missing ⚠️
...ent/idea/plugin/api/dashboard/ApiDashboardPanel.kt	0.000%	5 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##              master     #1197       +/-   ##
===============================================
- Coverage     57.563%   57.473%   -0.090%     
  Complexity      2409      2409               
===============================================
  Files            258       258               
  Lines          14624     14647       +23     
  Branches        3296      3300        +4     
===============================================
  Hits            8418      8418               
- Misses          4589      4612       +23     
  Partials        1617      1617               

Flag	Coverage Δ
unittests	57.473% <0.000%> (-0.090%)	⬇️

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Files with missing lines	Coverage Δ
...ent/idea/plugin/api/dashboard/ApiDashboardPanel.kt	0.000% <0.000%> (ø)
...dea/plugin/api/dashboard/ApiDashboardToolWindow.kt	0.000% <0.000%> (ø)
...t/idea/plugin/api/dashboard/ApiDashboardService.kt	0.000% <0.000%> (ø)

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