Good job Shardul. Allah bless you.
Hujur (saslm) is the 'sarder' of all prophets. Allah tawala shown that in 'zahiri surat' while he was doing the imamati of rest of the prophets. Allah tawala made Hujur (saslm) the Imam of all prophets before he creats 'Laouhe Mahfuz' and pen to write on.
﴾اَلَاۤ اِنَّ اَوۡلِيَآءَ اللّٰهِ لَا خَوۡفٌ عَلَيۡهِمۡ وَلَا هُمۡ يَحۡزَنُوۡنَ ۖ ۚ ﴿۶۲
"Listen, the friends of Allah shall have no fear, nor shall they grieve" (Yunus: 62)