Localization: "Addressable Group Rules" save dialog pre-fills a duplicated extension, creating Localization Addressable Group Rules.asset.asset

Steps to reproduce:

1. Create a new project
2. Install the Localization package (com.unity.localization)
3. In the Project window, right-click in Assets and choose Create > Localization > "Addressable Group Rules (Default)"
4. Read the filename the save dialog pre-fills, without editing it
5. Save, then read the asset's name in the Project window and its path in the status bar
6. For comparison, run Create > Localization > "Localization Settings" and read the filename its dialog pre-fills

Actual results: The save dialog offers Localization Addressable Group Rules.asset as the filename, and accepting it writes Assets/Localization Addressable Group Rules.asset.asset - the extension twice. The Inspector header carries it too: "Localization Addressable Group Rules.asset (Addressable Group Rules)". The sibling "Localization Settings" item pre-fills its name without an extension and produces a single one

Expected results: The dialog pre-fills the name without an extension, and the asset is written with one - matching the "Localization Settings" menu item

Reproducible with versions: 1.5.12 (6000.5.7f1, 6000.6.0f1, 6000.7.0a6)

Tested on (OS): MacBook Pro - Tahoe 26.6.2

Notes:

• All three "Addressable Group Rules" entries - Default, Legacy and Single Group - behave the same way, so the defect is in the shared create path rather than one menu item.
• The doubled extension is visible in three places at once: the save dialog, the Project window status bar path, and the Inspector header.