Cleans up the Notes page after a user creates their first folder:
1. FoldersRail: in `rail` mode (every view except "All notes"), insert a
small "My folders" / "مجلداتي" section header above the user's folder
list so it no longer visually nests under the dark "Unfiled" pill.
New i18n key `notes.folders.myFolders` in en.json and ar.json.
2. notes.tsx filteredNotes: when `folderSelection.kind === "all"`, hide
notes whose `folderId !== null`. Combined with the existing
FoldersBrowser cards this gives a file-manager feel — notes inside a
folder are reachable by opening the folder card and no longer appear
in the flat list, so users stop thinking move = copy. Counts on the
"All notes" rail entry stay as the total (totalCount prop unchanged).
3. notes.tsx grid: replaced the two separate grid cells for
composer/content with a single wrapper that uses `display: contents`
on mobile (children flow into the outer grid honoring order-1/2/3)
and `flex flex-col gap-4` on md+ (composer and content stack in the
same cell, no empty grid-row gap when the FoldersRail is taller than
the composer). Removed unused conditional row-start/row-span on the
inner content div.
Out of scope per plan: dnd-kit behavior, shared-with-me logic, composer
or folder card redesign.
Validation: `pnpm --filter @workspace/tx-os exec tsc --noEmit` clean.
Vite HMR successful after fix; no babel/JSX errors.
riyadhafraa
3d3a4ba972