feat: add main features

Agents for developpement added + frontend add + backend added. Git viewer created + agent and template creator + layout and project creator

crates/domain/src/validation.rs

@@ -0,0 +1,59 @@
+//! Small pure validation helpers shared across value objects.
+
+use crate::error::DomainError;
+
+/// Returns the trimmed string if non-empty, otherwise [`DomainError::EmptyField`].
+pub(crate) fn non_empty(value: &str, field: &'static str) -> Result<(), DomainError> {
+    if value.trim().is_empty() {
+        Err(DomainError::EmptyField { field })
+    } else {
+        Ok(())
+    }
+}
+
+/// Validates that `var` is a syntactically valid environment-variable identifier:
+/// non-empty, starts with a letter or `_`, and contains only ASCII alphanumeric
+/// characters or `_`.
+pub(crate) fn valid_env_var(var: &str) -> Result<(), DomainError> {
+    let invalid = || DomainError::InvalidEnvVar {
+        value: var.to_string(),
+    };
+    let mut chars = var.chars();
+    match chars.next() {
+        Some(c) if c.is_ascii_alphabetic() || c == '_' => {}
+        _ => return Err(invalid()),
+    }
+    if chars.all(|c| c.is_ascii_alphanumeric() || c == '_') {
+        Ok(())
+    } else {
+        Err(invalid())
+    }
+}
+
+/// Validates that a path is relative and does not escape its root via `..`.
+///
+/// Used for [`crate::profile::ContextInjection::ConventionFile`] targets and
+/// manifest `.md` paths, which must stay inside the project / `.ideai/` tree.
+pub(crate) fn relative_safe(path: &str) -> Result<(), DomainError> {
+    let err = || DomainError::PathNotRelativeSafe {
+        path: path.to_string(),
+    };
+    if path.is_empty() {
+        return Err(err());
+    }
+    // Reject absolute POSIX paths and Windows drive / UNC paths.
+    let bytes = path.as_bytes();
+    if bytes[0] == b'/' || bytes[0] == b'\\' {
+        return Err(err());
+    }
+    if path.len() >= 2 && bytes[1] == b':' && bytes[0].is_ascii_alphabetic() {
+        return Err(err());
+    }
+    // Reject any `..` traversal component (handle both separators).
+    for component in path.split(['/', '\\']) {
+        if component == ".." {
+            return Err(err());
+        }
+    }
+    Ok(())
+}