refactor: statusbar、companion、herdr 外掛改名加上 jsc- 前綴

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

plugins/jsc-companion/hooks/companion/seg.ts

@@ -0,0 +1,17 @@
+// 角色行用的字串片段與寬度計算（與 statusbar 外掛各自獨立，不互相依賴）
+export type Seg = { text: string; color?: string; dim?: boolean; bold?: boolean }
+
+export function bar(p: number, cells = 5): string {
+  const n = Math.max(0, Math.min(cells, Math.round((p / 100) * cells)))
+  return '▰'.repeat(n) + '▱'.repeat(cells - n)
+}
+
+const WIDE = /[ᄀ-ᅟ⺀-꓏가-힣豈-﫿︰-﹏＀-｠￠-￦]/
+
+export function width(s: string): number {
+  let w = 0
+  for (const ch of s) w += WIDE.test(ch) ? 2 : 1
+  return w
+}
+
+export const lineWidth = (segs: Seg[]) => segs.reduce((w, s) => w + width(s.text), 0)