feat: show SQL editor line numbers

src/main.rs

@@ -47,18 +47,20 @@ Navigation:
   Works on a saved database entry or any of its table/view children.
   r             Refresh relations and the active relation
   Connected databases have a trailing * and show their tables/views beneath them.
-  SQLite sidebar entries show only the filename; the info window shows the full path.
+  Unnamed SQLite entries show only the filename; the info window shows the full path.
   Enter on the connected database collapses/expands it without reconnecting.
   Keybindings float above the workspace; Up/Down/jk scroll, Home/End/g/G jump.
   Query Insert mode and connection/password fields keep ? as literal text.
   Full-width bars show dbdash/READ ONLY above and mode/database below.
   Saved PostgreSQL connections show database · user@host:port beside the mode,
-  matching the sidebar; passwords are never included.
+  regardless of custom sidebar names; passwords are never included.
   The database provider sits immediately left of the bottom-right position badge.
   Only badges have colored backgrounds; the remaining bar area uses terminal defaults.
   Focused inputs show one-based line:column (Unicode characters, not screen cells).
   The position badge shows N/A outside focused inputs, including in info/help popups.
   The query editor sits above rows/results; the explorer spans both panes.
+  The SQL editor has a one-based line-number gutter that follows vertical scrolling;
+  horizontal scrolling moves only SQL, not the numbers or logical cursor position.
   Explorer and rows/schema bottom borders align; table names appear in the
   top-right border, with page/column status below. Read errors appear above the query editor.
   Query editor starts in NORMAL: i/a/I/A enters INSERT; hjkl/arrows move.