fix(server): strip terminal escape sequences from opencode CLI output - #7988

💭 I'm checking the changed files, particularly opencodeRuntime.ts and a new shared util, to see if they follow Effect service conventions. I want to look closer at the schema decoding usage and the try/catch block that silently returns an empty array on failure.

1. browse_code — apps/server/src/provider/opencodeRuntime.ts

2. browse_code — packages/shared/src/stripTerminalEscapes.ts

💭 This is a bug fix touching pure parsing helpers, not an Effect service refactor, so those conventions about Context.Service, layers, or errors don't really apply here. Swapping Schema.fromJsonString for manual JSON.parse with try/catch isn't a convention violation since it just returns an empty array on failure. I'm satisfied this looks clean overall, and I'll summarize my conclusion as "All clear."