Fix mount point selection to return longest match instead of first match

[Copilot]

get_mount_point_for_path returns the first matching mount point instead of the most specific one. With mounts at / and /configs, path /configs/app.conf incorrectly resolves to /.

Changes

• Algorithm: Track longest matching mount point instead of returning first match
• Boundary validation: Ensure matches occur at path boundaries only (character after mount point must be / or \0)
  • Prevents /config from matching /configs/file
• Root mount handling: Special case for / to match any absolute path

Example

// Before: First match wins
Path: /configs/app.conf
Mounts: [/, /configs]
Result: / ❌

// After: Longest match wins
Path: /configs/app.conf  
Mounts: [/, /configs]
Result: /configs ✅

The boundary check also prevents false matches:

Path: /configs/file
Mounts: [/, /config, /configs]
Result: /configs (not /config) ✅

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Błąd w funkcji get_mount_point_for_path</issue_title>
<issue_description>get_mount_point_for_path nie działa prawidłowo - jeśli mamy pod indeksem 0 ścieżkę / a pod indeksem 1 ścieżkę /configs i chcemy mount-point dla path=/configs to zwróci nam tę z indeksu 0 zamiast ten z indeksu 1. Możesz podejrzeć sobie jak to jest rozwiązane tutaj:
https://bitbucket.org/chocos/chocos/src/develop/Source/system/core/src/fs/oc_vfs.c

static MountedEntry_t GetMountedFileSystem( const char * Path , bool WithParentDirs )
{
    MountedEntry_t  mountedEntry = NULL;
    oC_UInt_t       pathLength   = strlen(Path);

    oC_List_Foreach(MountedEntries,mounted)
    {
        oC_UInt_t mountPointLength = strlen(mounted->MountedPoint);

        if(
            (WithParentDirs && pathLength >= mountPointLength && strncmp(mounted->MountedPoint,Path,mountPointLength)==0) ||
            (!WithParentDirs && pathLength == mountPointLength && strcmp(mounted->MountedPoint,Path)==0)
            )
        {
            mountedEntry = mounted;
            break;
        }
    }

    return mountedEntry;
}

Może Ci to pomoże
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Błąd w funkcji get_mount_point_for_path #47

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.