e2e: fix broken tests due to NEO mainlayout, Agent select and Image parsing

[yomybaby]

Changes

• In component:
  • Added Suspense wrapper around AgentSelect component (related to https://github.com/lablup/backend.ai-webui/pull/2599)
  • Added copy button functionality for environment image names in session launcher
  • Updated breadcrumb selectors in e2e tests to use data-testid attribute
  • Fixed resource limit column name casing in environment tests
• In test code:
  • Added clipboard permission handling for copying image strings in config tests
  • Increased session creation timeout from 15s to 30s

Rationale:

• Improves test reliability by using more stable selectors
• Enhances user experience by adding copy functionality for image names
• Prevents timeout issues during session creation in slower environments
• Implements proper loading state handling for agent selection

Testing: The following scenarios should be verified:

1. Breadcrumb navigation and visibility in various pages
2. Image name copying functionality in session launcher
3. Session creation with extended timeout
4. Agent selection with loading states
5. Environment resource limit display and interaction

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[yomybaby]

• #2786
• #2661
• #2851 👈 (View in Graphite)
• #2853
• #2850
• #2847
• #2846 : 1 other dependent PR (#2858 )
• #2844
• main

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[github-actions[bot]]

Coverage report for ./react

St.:grey_question:	Category	Percentage	Covered / Total
🔴	Statements	5.29%	395/7462
🔴	Branches	4.59% (-0% 🔻)	237/5165
🔴	Functions	3.16%	78/2466
🔴	Lines	5.21%	380/7295

Test suite run success

124 tests passing in 14 suites.

Report generated by 🧪jest coverage report action from f288411033fcd98705f7a0b1dca16a6b68c892f8