refactor: route status porcelain map parsing through line parser

src/shared/git-worktree/index.ts

@@ -1,4 +1,6 @@
 export type { GitFileStatus, GitFileStat } from "./types"
+export type { ParsedGitStatusPorcelainLine } from "./parse-status-porcelain-line"
+export { parseGitStatusPorcelainLine } from "./parse-status-porcelain-line"
 export { parseGitStatusPorcelain } from "./parse-status-porcelain"
 export { parseGitDiffNumstat } from "./parse-diff-numstat"
 export { collectGitDiffStats } from "./collect-git-diff-stats"

src/shared/git-worktree/parse-status-porcelain.ts

@@ -1,24 +1,14 @@
 import type { GitFileStatus } from "./types"
+import { parseGitStatusPorcelainLine } from "./parse-status-porcelain-line"
 
 export function parseGitStatusPorcelain(output: string): Map<string, GitFileStatus> {
   const map = new Map<string, GitFileStatus>()
   if (!output) return map
 
   for (const line of output.split("\n")) {
-    if (!line) continue
-
-    const status = line.substring(0, 2).trim()
-    const filePath = line.substring(3)
-
-    if (!filePath) continue
-
-    if (status === "A" || status === "??") {
-      map.set(filePath, "added")
-    } else if (status === "D") {
-      map.set(filePath, "deleted")
-    } else {
-      map.set(filePath, "modified")
-    }
+    const parsed = parseGitStatusPorcelainLine(line)
+    if (!parsed) continue
+    map.set(parsed.filePath, parsed.status)
   }
 
   return map