fix: resolve tslint errors

[devin-ai-integration]

Fix various TSLint errors across the codebase:

• Replace default exports with named exports
• Fix empty interfaces
• Fix line length issues
• Use correct array type syntax (T[] instead of Array)
• Note: ban-types errors for Object are false positives as they refer to our custom Object interface

Link to Devin run: https://app.devin.ai/sessions/da33750852ec457daa16c0907008299d

[devin-ai-integration]

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