Feat: FileManager (#98) (#703)

* feat: add file manager module

- Complete file manager implementation with UI/UX
- Add drive management functionality
- Add file upload/download with progress tracking
- Add stamp integration and handling
- Add bulk operations and context menus

Co-authored-by: Roland Seres <roland.seres90@gmail.com>
Co-authored-by: nidishk <nidishkrishnan45@gmail.com>

src/modules/filemanager/utils/ui.ts

@@ -0,0 +1,27 @@
+import { Point, Dir } from './common'
+
+export function computeContextMenuPosition(args: {
+  clickPos: Point
+  menuRect: DOMRect
+  viewport: { w: number; h: number }
+  margin?: number
+  containerRect?: DOMRect | null
+}): { safePos: Point; dropDir: Dir } {
+  const { clickPos: pos, menuRect: rect, viewport } = args
+  const margin = args.margin ?? 8
+  const left = Math.max(margin, Math.min(pos.x, viewport.w - rect.width - margin))
+  const vh = viewport.h
+  let top = pos.y
+  let dir: Dir = Dir.Down
+
+  const spaceBelow = vh - pos.y
+
+  if (spaceBelow < rect.height * 1.4) {
+    top = Math.max(margin, pos.y - rect.height - margin)
+    dir = Dir.Up
+  } else {
+    top = Math.max(margin, Math.min(pos.y, vh - rect.height - margin))
+  }
+
+  return { safePos: { x: left, y: top }, dropDir: dir }
+}