refactoring the api endpoints to be separate files to reduce context usage

apps/server/src/routes/git/routes/diffs.ts

@@ -0,0 +1,67 @@
+/**
+ * POST /diffs endpoint - Get diffs for the main project
+ */
+
+import type { Request, Response } from "express";
+import { exec } from "child_process";
+import { promisify } from "util";
+import { getErrorMessage, logError } from "../common.js";
+
+const execAsync = promisify(exec);
+
+export function createDiffsHandler() {
+  return async (req: Request, res: Response): Promise<void> => {
+    try {
+      const { projectPath } = req.body as { projectPath: string };
+
+      if (!projectPath) {
+        res.status(400).json({ success: false, error: "projectPath required" });
+        return;
+      }
+
+      try {
+        const { stdout: diff } = await execAsync("git diff HEAD", {
+          cwd: projectPath,
+          maxBuffer: 10 * 1024 * 1024,
+        });
+        const { stdout: status } = await execAsync("git status --porcelain", {
+          cwd: projectPath,
+        });
+
+        const files = status
+          .split("\n")
+          .filter(Boolean)
+          .map((line) => {
+            const statusChar = line[0];
+            const filePath = line.slice(3);
+            const statusMap: Record<string, string> = {
+              M: "Modified",
+              A: "Added",
+              D: "Deleted",
+              R: "Renamed",
+              C: "Copied",
+              U: "Updated",
+              "?": "Untracked",
+            };
+            return {
+              status: statusChar,
+              path: filePath,
+              statusText: statusMap[statusChar] || "Unknown",
+            };
+          });
+
+        res.json({
+          success: true,
+          diff,
+          files,
+          hasChanges: files.length > 0,
+        });
+      } catch {
+        res.json({ success: true, diff: "", files: [], hasChanges: false });
+      }
+    } catch (error) {
+      logError(error, "Get diffs failed");
+      res.status(500).json({ success: false, error: getErrorMessage(error) });
+    }
+  };
+}