feat: gate chat panel on agents experiment and improve auth resilienc… #2203

Job	Run time
Integration Test (VS Code stable)	34s
Unit Test (Electron latest)	1m 3s
Integration Test (VS Code 1.106.0)	52s
Unit Test (Electron 37)	48s
Lint	1m 2s
Package	35s
	4m 54s

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