fix(app): regressions

packages/app/src/context/file/path.test.ts

@@ -108,7 +108,7 @@ describe("encodeFilePath", () => {
       const url = new URL(fileUrl)
       expect(url.protocol).toBe("file:")
       expect(url.pathname).toContain("README.bs.md")
-      expect(result).toBe("/D%3A/dev/projects/opencode/README.bs.md")
+      expect(result).toBe("/D:/dev/projects/opencode/README.bs.md")
     })
 
     test("should handle mixed separator path (Windows + Unix)", () => {
@@ -118,7 +118,7 @@ describe("encodeFilePath", () => {
       const fileUrl = `file://${result}`
 
       expect(() => new URL(fileUrl)).not.toThrow()
-      expect(result).toBe("/D%3A/dev/projects/opencode/README.bs.md")
+      expect(result).toBe("/D:/dev/projects/opencode/README.bs.md")
     })
 
     test("should handle Windows path with spaces", () => {
@@ -146,7 +146,7 @@ describe("encodeFilePath", () => {
       const fileUrl = `file://${result}`
 
       expect(() => new URL(fileUrl)).not.toThrow()
-      expect(result).toBe("/C%3A/")
+      expect(result).toBe("/C:/")
     })
 
     test("should handle Windows relative path with backslashes", () => {
@@ -177,7 +177,7 @@ describe("encodeFilePath", () => {
       const fileUrl = `file://${result}`
 
       expect(() => new URL(fileUrl)).not.toThrow()
-      expect(result).toBe("/c%3A/users/test/file.txt")
+      expect(result).toBe("/c:/users/test/file.txt")
     })
   })
 
@@ -193,7 +193,7 @@ describe("encodeFilePath", () => {
       const result = encodeFilePath(windowsPath)
       // Should convert to forward slashes and add leading /
       expect(result).not.toContain("\\")
-      expect(result).toMatch(/^\/[A-Za-z]%3A\//)
+      expect(result).toMatch(/^\/[A-Za-z]:\//)
     })
 
     test("should handle relative paths the same on all platforms", () => {
@@ -237,7 +237,7 @@ describe("encodeFilePath", () => {
       const result = encodeFilePath(alreadyNormalized)
 
       // Should not add another leading slash
-      expect(result).toBe("/D%3A/path/file.txt")
+      expect(result).toBe("/D:/path/file.txt")
       expect(result).not.toContain("//D")
     })
 
@@ -246,7 +246,7 @@ describe("encodeFilePath", () => {
       const result = encodeFilePath(justDrive)
       const fileUrl = `file://${result}`
 
-      expect(result).toBe("/D%3A")
+      expect(result).toBe("/D:")
       expect(() => new URL(fileUrl)).not.toThrow()
     })
 
@@ -256,7 +256,7 @@ describe("encodeFilePath", () => {
       const fileUrl = `file://${result}`
 
       expect(() => new URL(fileUrl)).not.toThrow()
-      expect(result).toBe("/C%3A/Users/test/")
+      expect(result).toBe("/C:/Users/test/")
     })
 
     test("should handle very long paths", () => {

packages/app/src/context/file/path.ts

@@ -90,9 +90,14 @@ export function encodeFilePath(filepath: string): string {
   }
 
   // Encode each path segment (preserving forward slashes as path separators)
+  // Keep the colon in Windows drive letters (`/C:/...`) so downstream file URL parsers
+  // can reliably detect drives.
   return normalized
     .split("/")
-    .map((segment) => encodeURIComponent(segment))
+    .map((segment, index) => {
+      if (index === 1 && /^[A-Za-z]:$/.test(segment)) return segment
+      return encodeURIComponent(segment)
+    })
     .join("/")
 }