fix(windows): add LOCALAPPDATA fallback for app data path

Add fallback path resolution when LOCALAPPDATA environment variable is
missing on Windows systems. This resolves 76 test failures in Windows CI
where missing LOCALAPPDATA caused undefined app data path, leading to
empty config and exit code mismatches.

Changes:
- src/constants/paths.mts: Construct fallback from homedir() + AppData/Local
- Maintains existing behavior on macOS and Linux
- Logs warning when fallback is used
- Updated comments to reflect new fallback behavior

Root cause chain:
Missing LOCALAPPDATA → getSocketAppDataPath() returns undefined →
empty config → org resolution fails → exit code 1

Author: jdalton

packages/cli/src/constants/paths.mts

@@ -176,31 +176,33 @@ export function getBlessedOptions() {
 
 export function getSocketAppDataPath(): string | undefined {
   // Get the OS app data directory:
-  // - Win: %LOCALAPPDATA% or fail?
+  // - Win: %LOCALAPPDATA% or fallback to %USERPROFILE%/AppData/Local
   // - Mac: %XDG_DATA_HOME% or fallback to "~/Library/Application Support/"
   // - Linux: %XDG_DATA_HOME% or fallback to "~/.local/share/"
-  // Note: LOCALAPPDATA is typically: C:\Users\USERNAME\AppData
+  // Note: LOCALAPPDATA typically points to user's AppData\Local directory.
   // Note: XDG stands for "X Desktop Group", nowadays "freedesktop.org"
   //       On most systems that path is: $HOME/.local/share
   // Then append `socket/settings`, so:
-  // - Win: %LOCALAPPDATA%\socket\settings or return undefined
+  // - Win: %LOCALAPPDATA%\socket\settings or %USERPROFILE%\AppData\Local\socket\settings
   // - Mac: %XDG_DATA_HOME%/socket/settings or "~/Library/Application Support/socket/settings"
   // - Linux: %XDG_DATA_HOME%/socket/settings or "~/.local/share/socket/settings"
   const isWin32 = process.platform === 'win32'
   let dataHome: string | undefined = isWin32
     ? process.env['LOCALAPPDATA']
     : process.env['XDG_DATA_HOME']
   if (!dataHome) {
+    const home = homedir()
     if (isWin32) {
-      logger.warn('Missing %LOCALAPPDATA%.')
-      return undefined
+      // Fallback: Use USERPROFILE or HOME when LOCALAPPDATA is missing.
+      dataHome = path.join(home, 'AppData', 'Local')
+      logger.warn('LOCALAPPDATA not set, using fallback path.')
+    } else {
+      const isDarwin = process.platform === 'darwin'
+      dataHome = path.join(
+        home,
+        isDarwin ? 'Library/Application Support' : '.local/share',
+      )
     }
-    const home = homedir()
-    const isDarwin = process.platform === 'darwin'
-    dataHome = path.join(
-      home,
-      isDarwin ? 'Library/Application Support' : '.local/share',
-    )
   }
   return dataHome ? path.join(dataHome, 'socket', 'settings') : undefined
 }