fix: use getuser() syscall for determining username rather than session.toml hack

template/docs/syscalls.md

@@ -519,11 +519,11 @@ bool config::unset(toml::Doc* doc, const char* key);
 ### Example
 
 ```cpp
-auto doc = montauk::config::load("session");
-const char* user = doc.get_string("session.username", "guest");
+auto doc = montauk::config::load("desktop");
+const char* theme = doc.get_string("appearance.theme", "light");
 
-montauk::config::set_string(&doc, "session.theme", "dark");
-montauk::config::save("session", &doc);
+montauk::config::set_string(&doc, "appearance.theme", "dark");
+montauk::config::save("desktop", &doc);
 ```
 
 ---
@@ -543,8 +543,8 @@ bool user::change_password(const char* username, const char* new_password);
 
 void user::set_session(const char* username);         // Log in
 void user::clear_session();                           // Log out
-bool user::get_session_username(char* buf, int sz);   // Get current user
-bool user::get_home_dir(char* buf, int sz);           // Get user's home directory
+bool user::get_session_username(char* buf, int sz);   // Get current process user
+bool user::get_home_dir(char* buf, int sz);           // Get current process home directory
 ```
 
 ---

template/sysroot/include/montauk/user.h

@@ -297,10 +297,10 @@ namespace user {
         return false;
     }
 
-    // ---- Session (current logged-in user) ----
+    // ---- Session state and current user helpers ----
 
-    // Write the current session after successful login.
-    // Stores username in 0:/config/session.toml so any app can query it.
+    // Persist login session state after successful login.
+    // Current processes should use getuser() for their active username.
     inline void set_session(const char* username) {
         montauk::toml::Doc doc;
         doc.init();
@@ -314,19 +314,14 @@ namespace user {
         montauk::fdelete("0:/config/session.toml");
     }
 
-    // Read the current username into buf. Returns true if a session exists.
+    // Read the current process username into buf. Returns true if one is set.
     inline bool get_session_username(char* buf, int bufSz) {
-        auto doc = config::load("session");
-        const char* name = doc.get_string("session.username", "");
-        bool found = (name[0] != '\0');
-        if (found) {
-            montauk::strncpy(buf, name, bufSz);
-        }
-        doc.destroy();
-        return found;
+        if (buf == nullptr || bufSz <= 0) return false;
+        int len = montauk::getuser(buf, (uint64_t)bufSz);
+        return len > 0 && buf[0] != '\0';
     }
 
-    // Get the current user's home directory. Returns true if a session exists.
+    // Get the current process user's home directory. Returns true if a user is set.
     inline bool get_home_dir(char* buf, int bufSz) {
         char username[32];
         if (!get_session_username(username, sizeof(username))) return false;