enable ^L to repaint

TODO.md

@@ -28,9 +28,8 @@ question: fixed at 2, or arbitrary N?
 ## TUI issues
 
 Starting the TUI with a ticker symbol doesn't uppercase (why can't we just solve
-this once?). ^L isn't refreshing the screen, and I'm getting artifacts on the
-display that don't go away when switching tabs (need specific steps to reproduce
-this).
+this once?). Display artifacts that don't go away when switching tabs (need
+specific steps to reproduce).
 
 ## Risk-free rate maintenance
 

src/tui.zig

@@ -511,6 +511,12 @@ const App = struct {
             return;
         }
 
+        // Ctrl+L: full screen redraw (standard TUI convention, not configurable)
+        if (key.codepoint == 'l' and key.mods.ctrl) {
+            ctx.queueRefresh() catch {};
+            return ctx.consumeAndRedraw();
+        }
+
         const action = self.keymap.matchAction(key) orelse return;
         switch (action) {
             .quit => {