Add case-insensitive path resolution for Current Path input

Walks each path component and matches against actual directory entries
when an exact match fails on Linux. Widget resyncs to the corrected
canonical path.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

utils.py

@@ -60,6 +60,40 @@ SNIPPETS_FILE = Path(".editor_snippets.json")
 # No restriction on directory navigation
 ALLOWED_BASE_DIR = Path("/").resolve()
 
+def resolve_path_case_insensitive(path: str | Path) -> Path | None:
+    """Resolve a path with case-insensitive component matching on Linux.
+
+    Walks each component of the path and matches against actual directory
+    entries when an exact match fails. Returns the corrected Path, or None
+    if no match is found.
+    """
+    p = Path(path)
+    if p.exists():
+        return p.resolve()
+
+    # Start from the root / anchor
+    parts = p.resolve().parts  # resolve to get absolute parts
+    built = Path(parts[0])     # root "/"
+    for component in parts[1:]:
+        candidate = built / component
+        if candidate.exists():
+            built = candidate
+            continue
+        # Case-insensitive scan of the parent directory
+        try:
+            lower = component.lower()
+            match = next(
+                (entry for entry in built.iterdir() if entry.name.lower() == lower),
+                None,
+            )
+        except PermissionError:
+            return None
+        if match is None:
+            return None
+        built = match
+    return built.resolve()
+
+
 def load_config():
     """Loads the main editor configuration (Favorites, Last Dir, Servers)."""
     if CONFIG_FILE.exists():