🏗️ Architect: Extract Modal Handlers

[google-labs-jules]

💡 Goal: Make handleModalSubmit in packages/bot/src/main.ts more readable and maintainable by decoupling completely unrelated concerns.
🔨 Changes: Extracted the bug/feature modal logic into handleBugFeatureModal and the bad group report logic into handleBadGroupModal. Added robust JSDocs and type hints to both.
🛡️ Safety: Verified that zero business logic was changed during the extraction, and all data objects were properly handled. Run full backend suite validation via ./scripts/verify-ts.sh.
📖 Readability: Transformed a 100-line monolithic switch-like block into two distinct and well-documented 50-line helpers, keeping handleModalSubmit clean and declarative.

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PR created automatically by Jules for task 2042385700513585489 started by @TytaniumDev

[google-labs-jules]

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