fix(review): support non-ASCII and whitespace file paths in code review (#637)

Pass `-c core.quotePath=false` to all git invocations so paths with
non-ASCII characters (Korean, Chinese, accented, etc.) and whitespace
are output as raw UTF-8 instead of octal escapes. Fixes the 0/0 files
issue when repos contain such paths.

Closes #628

For provenance purposes, this commit was AI assisted.

Author: backnotprop

apps/pi-extension/server/serverReview.ts

@@ -126,7 +126,7 @@ export const reviewRuntime: ReviewGitRuntime = {
 		options?: { cwd?: string; timeoutMs?: number },
 	): Promise<GitCommandResult> {
 		return new Promise((resolve) => {
-			const proc = spawn("git", args, {
+			const proc = spawn("git", ["-c", "core.quotePath=false", ...args], {
 				cwd: options?.cwd,
 				stdio: ["ignore", "pipe", "pipe"],
 			});

packages/server/git.ts

@@ -38,7 +38,7 @@ async function runGit(
   args: string[],
   options?: { cwd?: string; timeoutMs?: number },
 ): Promise<GitCommandResult> {
-  const proc = Bun.spawn(["git", ...args], {
+  const proc = Bun.spawn(["git", "-c", "core.quotePath=false", ...args], {
     cwd: options?.cwd,
     stdout: "pipe",
     stderr: "pipe",