revert: remove camera zoom, keep day/night + tooltip + crosshair

Zoom caused buffer reallocation issues and cursor misalignment.
Removed: char_size field, adjust_zoom(), MIN/MAX_CHAR, zoom input.
Kept: day/night cycle, tooltip, crosshair, cell_pixel_size() (returns constant 8).

AGENTS.md

@@ -88,7 +88,6 @@ GPU (`--mode ascii` / `--mode graphics`):
 - `r` — drop first inventory item
 - `1`–`0` / `x` — paint material brush
 - `y` / `u` / `i` / `o` — move camera offset
-- `+` / `-` — zoom in / out
 - `m` — toggle audio
 - `q` / `esc` — quit
 

src/main.rs

@@ -72,7 +72,6 @@ trait GpuRenderer {
     );
     fn grid_w(&self) -> usize;
     fn grid_h(&self) -> usize;
-    fn adjust_zoom(&mut self, delta: i32);
     fn cell_pixel_size(&self) -> u32;
 }
 
@@ -100,9 +99,6 @@ impl GpuRenderer for verbatim::render::vulkan::VulkanRenderer {
     fn grid_h(&self) -> usize {
         verbatim::render::vulkan::VulkanRenderer::grid_h(self)
     }
-    fn adjust_zoom(&mut self, delta: i32) {
-        verbatim::render::vulkan::VulkanRenderer::adjust_zoom(self, delta)
-    }
     fn cell_pixel_size(&self) -> u32 {
         verbatim::render::vulkan::VulkanRenderer::cell_pixel_size(self)
     }
@@ -132,9 +128,6 @@ impl GpuRenderer for verbatim::render::graphics::GraphicsRenderer {
     fn grid_h(&self) -> usize {
         verbatim::render::graphics::GraphicsRenderer::grid_h(self)
     }
-    fn adjust_zoom(&mut self, delta: i32) {
-        verbatim::render::graphics::GraphicsRenderer::adjust_zoom(self, delta)
-    }
     fn cell_pixel_size(&self) -> u32 {
         verbatim::render::graphics::GraphicsRenderer::cell_pixel_size(self)
     }
@@ -327,13 +320,6 @@ fn run_gpu_mode<R: GpuRenderer>(title: &str) {
                         game.audio.toggle();
                     }
 
-                    if input.zoom_in {
-                        renderer.adjust_zoom(-2);
-                    }
-                    if input.zoom_out {
-                        renderer.adjust_zoom(2);
-                    }
-
                     if input.jump {
                         let on_ground = game.check_on_ground();
                         if on_ground {

src/render/graphics.rs

@@ -12,8 +12,6 @@ const CHAR_W: u32 = 8;
 const CHAR_H: u32 = 8;
 const UI_CELL_SIZE: u32 = 2;
 const MAX_FRAMES: usize = 2;
-const MIN_CHAR: u32 = 4;
-const MAX_CHAR: u32 = 24;
 
 fn entity_priority(kind: crate::entity::EntityKind) -> u32 {
     use crate::entity::EntityKind;
@@ -75,7 +73,6 @@ struct PushConstants {
 pub struct GraphicsRenderer {
     grid_w: usize,
     grid_h: usize,
-    char_size: u32,
 
     entry: ash::Entry,
     instance: ash::Instance,
@@ -712,7 +709,6 @@ impl GraphicsRenderer {
         Ok(Self {
             grid_w,
             grid_h,
-            char_size: CHAR_W,
             entry,
             instance,
             surface,
@@ -1115,18 +1111,8 @@ impl GraphicsRenderer {
         self.grid_h
     }
 
-    pub fn adjust_zoom(&mut self, delta: i32) {
-        let new_size =
-            (self.char_size as i32 + delta).clamp(MIN_CHAR as i32, MAX_CHAR as i32) as u32;
-        if new_size == self.char_size {
-            return;
-        }
-        self.char_size = new_size;
-        self.check_resize();
-    }
-
     pub fn cell_pixel_size(&self) -> u32 {
-        self.char_size
+        CHAR_W
     }
 
     fn check_resize(&mut self) {
@@ -1253,8 +1239,8 @@ impl GraphicsRenderer {
         };
 
         // Reallocate instance buffer if grid size changed
-        let new_grid_w = (new_extent.width / self.char_size) as usize;
+        let new_grid_w = (new_extent.width / CHAR_W) as usize;
-        let new_grid_h = (new_extent.height / self.char_size) as usize;
+        let new_grid_h = (new_extent.height / CHAR_H) as usize;
         let new_count = new_grid_w * new_grid_h;
 
         if new_count != self.instance_count {

src/render/vulkan.rs

@@ -12,8 +12,6 @@ use crate::world::grid::{MAX_WORLD_H, MAX_WORLD_W};
 const CHAR_W: u32 = 8;
 const CHAR_H: u32 = 8;
 const UI_CELL_SIZE: u32 = 2;
-const MIN_CHAR: u32 = 4;
-const MAX_CHAR: u32 = 24;
 const ATLAS_COLS: usize = 16;
 const ATLAS_ROWS: usize = 8;
 const ATLAS_W: u32 = (ATLAS_COLS as u32) * CHAR_W;
@@ -84,7 +82,6 @@ struct PushConstants {
 pub struct VulkanRenderer {
     grid_w: usize,
     grid_h: usize,
-    char_size: u32,
 
     entry: ash::Entry,
     instance: ash::Instance,
@@ -279,7 +276,6 @@ impl VulkanRenderer {
         Ok(Self {
             grid_w,
             grid_h,
-            char_size: CHAR_W,
             entry,
             instance,
             surface,
@@ -712,18 +708,8 @@ impl VulkanRenderer {
         self.grid_h
     }
 
-    pub fn adjust_zoom(&mut self, delta: i32) {
-        let new_size =
-            (self.char_size as i32 + delta).clamp(MIN_CHAR as i32, MAX_CHAR as i32) as u32;
-        if new_size == self.char_size {
-            return;
-        }
-        self.char_size = new_size;
-        self.check_resize();
-    }
-
     pub fn cell_pixel_size(&self) -> u32 {
-        self.char_size
+        CHAR_W
     }
 
     fn check_resize(&mut self) {
@@ -846,8 +832,8 @@ impl VulkanRenderer {
                 .expect("cmd_bufs")
         };
 
-        let new_grid_w = (new_extent.width / self.char_size) as usize;
+        let new_grid_w = (new_extent.width / CHAR_W) as usize;
-        let new_grid_h = (new_extent.height / self.char_size) as usize;
+        let new_grid_h = (new_extent.height / CHAR_H) as usize;
         let new_count = new_grid_w * new_grid_h;
 
         if new_count != self.instance_count {

src/render/window_input.rs

@@ -19,8 +19,6 @@ pub struct WindowInput {
     pub cam_down: bool,
     pub quit: bool,
     pub toggle_audio: bool,
-    pub zoom_in: bool,
-    pub zoom_out: bool,
     pub paint: Option<u8>,
     pub mouse_x: f64,
     pub mouse_y: f64,
@@ -43,8 +41,6 @@ pub struct WindowInput {
     use_item_was_down: bool,
     drop_item_was_down: bool,
     audio_was_down: bool,
-    zoom_in_was_down: bool,
-    zoom_out_was_down: bool,
     down_keys: HashSet<KeyCode>,
 }
 
@@ -68,8 +64,6 @@ impl WindowInput {
             cam_down: false,
             quit: false,
             toggle_audio: false,
-            zoom_in: false,
-            zoom_out: false,
             paint: None,
             mouse_x: 0.0,
             mouse_y: 0.0,
@@ -92,8 +86,6 @@ impl WindowInput {
             use_item_was_down: false,
             drop_item_was_down: false,
             audio_was_down: false,
-            zoom_in_was_down: false,
-            zoom_out_was_down: false,
             down_keys: HashSet::new(),
         }
     }
@@ -214,20 +206,10 @@ impl WindowInput {
         self.cam_up = keys.contains(&KeyCode::KeyI);
         self.cam_down = keys.contains(&KeyCode::KeyO);
         self.quit = keys.contains(&KeyCode::KeyQ) || keys.contains(&KeyCode::Escape);
-
         let now_audio = keys.contains(&KeyCode::KeyM);
         self.toggle_audio = now_audio && !self.audio_was_down;
         self.audio_was_down = now_audio;
 
-        let now_zoom_in = keys.contains(&KeyCode::Equal) || keys.contains(&KeyCode::NumpadAdd);
-        self.zoom_in = now_zoom_in && !self.zoom_in_was_down;
-        self.zoom_in_was_down = now_zoom_in;
-
-        let now_zoom_out =
-            keys.contains(&KeyCode::Minus) || keys.contains(&KeyCode::NumpadSubtract);
-        self.zoom_out = now_zoom_out && !self.zoom_out_was_down;
-        self.zoom_out_was_down = now_zoom_out;
-
         self.paint = None;
         if keys.contains(&KeyCode::Digit1) {
             self.paint = Some(1);