E2E Test Selection:
The changes are focused on defensive improvements to the Perps controller subsystem:

1. stringParseUtils.ts: Enhanced stripQuotes to handle nested quotes from LaunchDarkly (e.g., '"xyz:TSLA"' → xyz:TSLA)

2. FeatureFlagConfigurationService.ts: Added filterValidPatterns() to validate market patterns before use, dropping invalid patterns gracefully instead of crashing

3. HyperLiquidProvider.ts: Added compilePatternsSafely() to wrap pattern compilation in try-catch, preventing constructor crashes from bad patterns

These changes improve resilience of the Perps feature when receiving malformed configuration from LaunchDarkly. While the changes are defensive and don't alter core functionality, they affect critical initialization paths for the Perps trading feature.

Selected tags based on tag descriptions:

• SmokePerps: Directly tests perpetuals trading functionality including Add Funds flow, balance verification, and Perps interface - all of which depend on the HyperLiquidProvider and FeatureFlagConfigurationService being properly initialized
• SmokeWalletPlatform: Required because Perps is a section inside the Trending tab (per tag description: "changes to Perps views affect Trending")
• SmokeConfirmations: Required because Add Funds deposits are on-chain transactions (per SmokePerps description)

Performance Test Selection:
The changes affect the HyperLiquidProvider constructor and FeatureFlagConfigurationService initialization, which are part of the Perps feature startup path. While the changes are primarily defensive (error handling), they add validation loops during pattern compilation. The @PerformancePreps tag tests perps market loading, position management, and add funds flow - all of which depend on the modified initialization code. Running this performance test will verify that the defensive changes don't introduce noticeable latency in the Perps feature.