Pure black dark theme - #4068

💭 I'm reviewing this sidebar redesign PR to check if it introduces any new Effect service patterns. Most of the changes are React components and mobile UI updates, with a new pure function in the client runtime, but so far I'm not seeing any Effect service usage in the modified files. This doesn't look like a service creation or refactoring, so the Effect import conventions probably don't apply here. Let me double-check the imports in settings.ts and a couple other files to be sure there are no violations. I need to adjust the URL formatting. I'm noticing the URL has a formatting issue with a newline character, so let me adjust it to use just the base URL instead. I'm noticing the parser is having trouble with the newline placement before the url parameter. Let me try reformatting it to keep everything on a single line instead. Now checking the imports in settings.ts to see if they're consolidated from the "effect" module. The namespace imports look correct for a schema file. I'm checking useThreadActions.ts since it imports Cause, AsyncResult, and error classes, but these are React hooks rather than Effect service definitions, so the naming conventions don't apply here. Let me verify whether any new services or error classes are being defined in ways that violate the conventions. I'm making sure there are no consolidated imports in the modified TypeScript files to keep things clean.