Mustahabb (Arabic: مستحبّ, lit. 'recommended') is an Islamic term referring to recommended, favoured or virtuous actions. Mustahabb actions are those whose ruling (ahkam) in Islamic law falls between mubah (neutral; neither encouraged nor discouraged) and wajib (compulsory).
No doubt that performing Qaza prayers is obligatory and more important than recommended prayers. The reward for Qaza prayers is more than recommended prayers.
Recommended fast can be broken any time. It is recommended to eat or drink if a Mo'min invite you while your fasting a recommended fast with out telling him that you are fasting.
No need for permission of parents in recommended fast nor in other recommended worship.
We have many narrations encouraging wearing ring, any ring except golden ring for me because it is forbidden for men to wear gold as well as pure silk. We also have many narrations to wear Aqeeq Yamani (Onyx) and Pharozaj and other precious stones.
You can find many of these Hadeeths in Wasaa'il Al-Shia, Hadeeth number 5980 and 5983, 5991, and 5993, and 5996 and many others.
Night prayer (Salat al-Layl or Namaz e Shab) is the most recommended Mustahab prayer every night. It is very easy to remember as it has four units of two Rak'ats each just like morning prayers, then another two Rak'ats called Shaf'a شفع then just single Rak'at called Witr. These 11 Rak'ats are the full form of Night Prayer. There is shorter form of it which contains just the two Rak'ats of Shaf'a and the single Rak'at of Witr. The shortest form is just the single Rak'at of Witr alone.
Only white and clean
It is obligatory for those who know about and can see the eclipse in their area to pray Salat al-Ayaat which is two Rak'ats which five Rokoo' in every Rak'at.
Nothing is Haraam specifically during or because of eclipse just because of the eclipse.
it is Makrouh ( disliked but not Haraam) to look at the sun during the eclipse.
It is Makrouh ( disliked but not Haraam) to have sexual intercourse during the eclipse.
It is recommended to busy in supplication and worshipping Allah during the eclipse.
According to our leading scholars, the answer to your question is: Yes.
Yes, it is Makrouh (disliked and harmful) to sleep between Fajr and sunrise and also between Asr and Maghrib.
Sleeping between Fajr and sunrise drives away Barakat and makes the income less, as we read in many Hadeeths.(النوم بين الفجر وطلوع الشمس يطرد الرزق)
Sleeping between Asr and Maghrib harms the mental and psychological health. The Hadeeth states: Who sleeps after Asr, should not blame but himself. (من نام بعد العصر فلا يلومن الا نفسه)
Any act which causes pain to any one else ( except the enemies of Allah) is forbidden and Haraam.
Being good to your spouse is one of most important duties in Islam.
If any recommended act cause pain to your wife, you should not do it, because avoiding Haraam is before doing a recommended act.