chore: merge origin/main with local test additions

Resolves conflict in repo.spec.ts by combining getRepoPermission
tests from main with the getFiles and queryFileContent tests from
the local test pass. Adds getRepoPermission to the userRepo.store
spec mocks so the new permission probe added upstream doesn't break
the store tests.

src/utils/uniqueFilename.spec.ts

@@ -0,0 +1,71 @@
+import { describe, expect, it } from "vitest"
+
+import { uniqueFilename } from "./uniqueFilename"
+
+describe("uniqueFilename", () => {
+  it("returns basename.ext when nothing collides", () => {
+    expect(
+      uniqueFilename({
+        basename: "myfile",
+        extension: ".png",
+        existingPaths: ["docs/notes/myfile.md"],
+        directory: "docs/notes"
+      })
+    ).toEqual("myfile.png")
+  })
+
+  it("appends -2 on first collision (skips -1)", () => {
+    expect(
+      uniqueFilename({
+        basename: "myfile",
+        extension: ".png",
+        existingPaths: ["docs/notes/myfile.png"],
+        directory: "docs/notes"
+      })
+    ).toEqual("myfile-2.png")
+  })
+
+  it("appends -3 when both base and -2 exist", () => {
+    expect(
+      uniqueFilename({
+        basename: "myfile",
+        extension: ".png",
+        existingPaths: ["docs/notes/myfile.png", "docs/notes/myfile-2.png"],
+        directory: "docs/notes"
+      })
+    ).toEqual("myfile-3.png")
+  })
+
+  it("fills gaps when -3 exists but -2 does not", () => {
+    expect(
+      uniqueFilename({
+        basename: "myfile",
+        extension: ".png",
+        existingPaths: ["docs/notes/myfile.png", "docs/notes/myfile-3.png"],
+        directory: "docs/notes"
+      })
+    ).toEqual("myfile-2.png")
+  })
+
+  it("handles repo-root directory", () => {
+    expect(
+      uniqueFilename({
+        basename: "myfile",
+        extension: ".jpg",
+        existingPaths: ["myfile.jpg"],
+        directory: ""
+      })
+    ).toEqual("myfile-2.jpg")
+  })
+
+  it("does not collide with a different extension", () => {
+    expect(
+      uniqueFilename({
+        basename: "myfile",
+        extension: ".png",
+        existingPaths: ["docs/myfile.jpg"],
+        directory: "docs"
+      })
+    ).toEqual("myfile.png")
+  })
+})

src/utils/uniqueFilename.ts

@@ -0,0 +1,21 @@
+export const uniqueFilename = ({
+  basename,
+  extension,
+  existingPaths,
+  directory
+}: {
+  basename: string
+  extension: string
+  existingPaths: string[]
+  directory: string
+}): string => {
+  const prefix = directory ? `${directory}/` : ""
+  const candidate = (n: number) =>
+    n === 1 ? `${basename}${extension}` : `${basename}-${n}${extension}`
+  const taken = new Set(existingPaths)
+  let n = 1
+  while (taken.has(`${prefix}${candidate(n)}`)) {
+    n = n === 1 ? 2 : n + 1
+  }
+  return candidate(n)
+}