Add Japanese to font-family

[superuser7777]

Please consider changing the CSS as shown below.
This modification improves display readability for Japanese people.

Add
"Osaka",

Change before
font-family: "OpenSans", "Cantarell", "Helvetica", "Arial", "PingFang SC", "Microsoft YaHei", sans-serif;

After change
font-family: "OpenSans", "Cantarell", "Helvetica", "Arial", "Osaka", "PingFang SC", "Microsoft YaHei", sans-serif;

The Chinese fonts such as "PingFang SC" and "Microsoft YaHei" can be displayed like Japanese, but the kanji are greatly broken down, making them difficult for Japanese people to read.

--
Thank you for the great software!
I've migrated all my RSS readers to FreshRSS!

[Alkarex]

We should probably update all the themes, which have overridden the base font definition, e.g.:

FreshRSS/p/themes/Alternative-Dark/adark.css

Line 52 in 86d7134

font-family: "OpenSans", "Cantarell", "Helvetica", "Arial", "PingFang SC", "Microsoft YaHei", sans-serif;

Edit: Done 3864634

[Alkarex]

Related to #1541

@hoilc if you are around, do you have any comment? For instance a negative consequence, we might have overlooked?

[Alkarex]

I am wondering whether adding (only) "Osaka" is the most appropriate fix. It seems to be only for Apple. Isn't e.g. "MS Gothic" more common?

[Alkarex]

Note for later: we should add a way to tweak font parameters independently of the default settings proposed by the themes (we might have an issue somewhere already)

[math-GH]

It is very nice to know that FreshRSS is used in Japan too :)

Please support us here with screenshots "before" and "after" the change.

Please find another default font families that is installed on Windows by default. Linux would be fine too.

[math-GH]

the conflicted files can be deleted to solve the conflict

[Alkarex]

@superuser7777 Your feedback would be welcome in #5895 , for instance related to font selection and calendar selection (which calendar system do you use?)