Team Summary: Competing in Season count off by 1

**Describe the bug**
A team's summary page includes the line "Team [#####] has been competing in the _FIRST_ Tech Challenge for [#] seasons,". This number appears to be off by one.

**To Reproduce**
Steps to reproduce the behavior:
1. Navigate to the page of a team with rookie year 2025 (i.e. first season was the 2025-26 season)
1. example: https://ftc-events.firstinspires.org/team/34032
2. Observe "competing in the _FIRST_ Tech Challenge for 0 seasons"
3. Navigate to the page of a team with rookie year 2024 (i.e. competed in 2024-25 INTO THE DEEP™️ and 2025-26 DECODE™️)
1. example: https://ftc-events.firstinspires.org/team/28685
5. Observe "competing in the _FIRST_ Tech Challenge for 1 season"
6. ...

**Expected behavior**
A team founded in the current season (i.e. for CMP year 2026, rookie year = 2025 and playing in the 2025-26 season) should have been competing for 1 season (the current one), not 0. Likewise, all others seem to be off by one.

**Screenshots**

**Device (please complete the following information):**
- OS: macOS 26.5.1 (25F80)
- Browser: Firefox 151.0.3 (aarch64)
- FTC Events - v5.8.1

**Additional context**
While we're here, is the correct phrasing "competing in *FIRST* Tech Challenge," or "competing in **the** *FIRST* Tech Challenge." Saying "The FTC" sounds... odd?

Also I suppose while I'm here nitpicking, shouldn't *FIRST* be italicized?