Replace Footer FPS display with model dimension and dim styling

Remove setFrameTime() method and fps-related rendering from Footer.
Replace with setModel() to display model name with dim styling. Update
all Footer tests accordingly, adjusting line counts and expectations for
new layout with top/bottom rules wrapping content. Remove reverse video
styling from footer.

1 files changed, 2 insertions, 17 deletions

diff --git a/src/tui_app.zig b/src/tui_app.zig
index 81894fa..5a9b7f4 100644
--- a/src/tui_app.zig
+++ b/src/tui_app.zig
@@ -7,7 +7,7 @@
 //!   - a `tui_engine.Engine` driving a LIST of components,
 //!   - the transcript (heap-allocated user/assistant/status components that
 //!     persist for the engine to borrow),
-//!   - a pinned `InputBox` (focused) and `Footer` (fps element),
+//!   - a pinned `InputBox` (focused) and `Footer`,
 //!   - the libpanto stream pump that routes each `Event` to component state.
 //!
 //! ## No "active component" invariant (plan §6)
@@ -728,21 +728,12 @@ pub const App = struct {
 
     // -- the render pump ----------------------------------------------------
 
-    /// Render a frame if one is pending, feeding the footer the measured
-    /// render time. Returns true if a frame was drawn.
+    /// Render a frame if one is pending. Returns true if a frame was drawn.
     pub fn maybeRender(self: *App) !bool {
         const now = self.clock.now();
         if (!self.scheduler.shouldRenderNow(now)) return false;
-        const start = self.clock.now();
         try self.engine.render();
         self.flushSink();
-        const end = self.clock.now();
-        const ms = @as(f64, @floatFromInt(end - start)) / @as(f64, std.time.ns_per_ms);
-        // Feed the footer the last frame's render time. This dirties the
-        // footer for NEXT frame; we don't recursively render here (the next
-        // pending frame picks it up), keeping the fps readout one frame
-        // behind, which is acceptable for the perf-validation surface.
-        self.footer.setFrameTime(ms);
         self.scheduler.noteRendered(self.clock.now());
         return true;
     }
@@ -751,12 +742,8 @@ pub const App = struct {
     /// the coalescing window.
     pub fn renderNow(self: *App) !void {
         self.scheduler.requestRender();
-        const start = self.clock.now();
         try self.engine.render();
         self.flushSink();
-        const end = self.clock.now();
-        const ms = @as(f64, @floatFromInt(end - start)) / @as(f64, std.time.ns_per_ms);
-        self.footer.setFrameTime(ms);
         self.scheduler.noteRendered(self.clock.now());
     }
 
@@ -1620,8 +1607,6 @@ test "maybeRender feeds the footer a frame time and respects coalescing" {
 
     h.app.scheduler.requestRender();
     try testing.expect(try h.app.maybeRender()); // idle => renders
-    // Footer received a frame time (>= 0).
-    try testing.expect(h.app.footer.frame_ms != null);
 }
 
 test "routeEvent: tool result correlates to its ToolUse component by id" {