Is my spouse entitled to half of my saving and retirement if I don’t work?

Texas is a community property state.  The means that anything acquired or obtained during the marriage is subject to division.  Some people think this means that everything has to be divided 50/50.  This is the not the case.  Texas uses a standard called "fair and equitable."  The court's will strive for 50/50'ish division, but it may not be exactly 50/50.  The court's will and can deviate if there is a reason to do so, for example:  (1) if one spouse gave thousands of dollars to a boyfriend/girlfriend or (2) one spouse was physically abusive to the other spouse or (3) one spouse has an inability to support themselves. (These are just 3 examples).  If you cannot work, then this can be taking into consideration by the judge in dividing the estate.
All community property goes into the pot and then it's divided.  Sometimes, the court will order one asset to go to one party (like a house), and then another asset (like a retirement account) to the other spouse.  As long as the values are close to equal, then the court can do this because it's resulting in a fair and equitable division of the estate.  The courts are not required to go divide each asset in half.
If an asset is not community property, then it does not go into the pot to be divided.  That asset stays with the spouse who owns that asset.  If you earned your retirement before you and your wife married, then you will get to keep that asset.  If part of your retirement was earned before marriage, then only the part that was acquired during marriage will be subject to division.  (The same rules would apply to your house and any other accounts/assets).
The disability claim may or may not be subject to division.  Depending on how it's paid, why it's paid, and how the disability is structured, it may be separate or community property.  Do not assume that your disability is automatically community property.  You will need to take your disability documents to a family law attorney so they can tell you if they are or are not subject to division.  I usually suggest getting at least two opinions on this issue.  Find a family law attorney who actually knows disability rules to help you keep this asset.