fix: remove trailing comma in TOML inline table

[JARVIS-coding-Agent]

Fixes #195

Problem

The Go template range loop in configmap.yaml appends a trailing comma after every key-value pair in the TOML inline table:

env = { GH_TOKEN = "xxx",  }

TOML does not allow trailing commas in inline tables, causing parser errors and pod crash loops.

Fix

Use a $first flag to insert commas only between items, not after the last one.

- env = { {{ range $k, $v := $cfg.env }}{{ $k }} = "{{ $v }}", {{ end }} }
+ env = { {{ $first := true }}{{ range $k, $v := $cfg.env }}{{ if not $first }}, {{ end }}{{ $k }} = "{{ $v }}"{{ $first = false }}{{ end }} }

[chaodu-agent]

LGTM 👍 乾淨俐落的 one-liner fix，解決 TOML trailing comma 導致 pod crash loop 的問題。