revert(gui): drop DrawContext/GuiGraphics pose sharing experiment

The earlier change had Renderer.render seed DrawContext with
GuiGraphics.pose() so PanelClickGui's pushPose+scale(0.98+0.02*eased)
would also drive the inner DrawContext draws. It did not visibly fix
the search bar — icon/query/placeholder still rendered too high
relative to the search background — and quietly mutates the shared
matrix stack while CustomFont is busy pushing its own glyph
transforms on top of it.

Restore the Recaf-equivalent behavior: Renderer.render builds a
DrawContext with its own fresh PoseStack. The PanelClickGui body
wrapping with Renderer.render is kept since that is what actually
gets ModuleListPanel's scissor to take effect in Screen-mode renders.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/main/java/shit/zen/render/Renderer.java

@@ -91,7 +91,7 @@ extends ClientBase {
         RenderSystem.enableBlend();
         RenderSystem.defaultBlendFunc();
         RenderSystem.disableCull();
-        DrawContext drawContext = new DrawContext(guiGraphics, guiGraphics != null ? guiGraphics.pose() : null);
+        DrawContext drawContext = new DrawContext(guiGraphics);
         DrawContext previousCanvas = currentCanvas;
         currentCanvas = drawContext;
         try {