I totally agree with you.. i.e. you want to save the space at the tool bar and make the app simple and at the same time less cluttered.. and it should have all the possible functions.

for this i can only say that.. keep the toolbar as it is but for recitation and translation part i think this might work..
[Below idea is for hidden translation and tafsir only; the user has to select an option in settings for permanent translation and tafsir on/off]

A single tap for recitation (as you prefered)
A long tap on the verse should display translation, bookmark and tafsir buttons below the verse like a pop down menu or bar (i'll show an image afterwards) and the user selects the functions he/she wants, i.e. if he want to see translation with tafsir he can select those functions.

And if possible we can implement [in future] recitation for translation and tafsir [in different languages] through this method.

i also have one more suggestion that, is it possible to have two language translations, i.e. I want urdu and english, [ this can be set in the settings to select trasnlation language].

Now About the theme part, i think we need to put atleast 3 to 5 themes (different colors) embedded rather than externally because this removes any unwanted confusion for the user. we can make a color selection menu within the settings to select the color options (Blue, green, orange, white and black)


Thanks