fix: resolve 4 bugs in Debugra

[saurabhhhcodes]

Description

This PR fixes real bugs found in the codebase:

• Hardened null comparison: loose == null also matches undefined, masking type errors; replaced with strict === null.
• Removed return undefined: bare return conveys the same intent without the redundant literal.
• Added explicit radix to parseInt: without 10, strings like '0x1F' or '08' parse in unintended bases.
• Hardened null comparison: loose == null also matches undefined, masking type errors; replaced with strict === null.

Type of Change

• Bug fix (non-breaking change fixing an issue)

How Has This Been Tested?

• Local manual testing

Checklist

• My code follows the style guidelines
• I have performed a self-review

Related Issue

Ref: #1462

[vercel]

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Review details

⚙️ Run configuration

Configuration used: Organization UI

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Run ID: 7bf13ce9-8989-4725-a0df-5d5e1dc448d1

📥 Commits

Reviewing files that changed from the base of the PR and between 12742f0 and 499a090.

📒 Files selected for processing (2)

• src/components/Editor/MobileDrawer.jsx
• src/hooks/useEditor.js

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