add context window monitor

Writes the current context window to logs/current_context_window (uses a symlink to a session ID).

This PR was unfortunately generated by a different LLM and did a ton of superficial reformating, it's actually a fairly small and benign change, but I don't want to roll back everything. Hope that's ok.

crates/g3-computer-control/src/ocr/mod.rs

@@ -7,7 +7,7 @@ use async_trait::async_trait;
 pub trait OCREngine: Send + Sync {
     /// Extract text with locations from an image file
     async fn extract_text_with_locations(&self, path: &str) -> Result<Vec<TextLocation>>;
-    
+
     /// Get the name of the OCR engine
     fn name(&self) -> &str;
 }

crates/g3-computer-control/src/ocr/tesseract.rs

@@ -12,16 +12,18 @@ impl TesseractOCR {
         let tesseract_check = std::process::Command::new("which")
             .arg("tesseract")
             .output();
-        
+
         if tesseract_check.is_err() || !tesseract_check.as_ref().unwrap().status.success() {
-            anyhow::bail!("Tesseract OCR is not installed on your system.\n\n\
+            anyhow::bail!(
+                "Tesseract OCR is not installed on your system.\n\n\
                 To install tesseract:\n  macOS:   brew install tesseract\n  \
                 Linux:   sudo apt-get install tesseract-ocr (Ubuntu/Debian)\n           \
                 sudo yum install tesseract (RHEL/CentOS)\n  \
                 Windows: Download from https://github.com/UB-Mannheim/tesseract/wiki\n\n\
-                After installation, restart your terminal and try again.");
+                After installation, restart your terminal and try again."
+            );
         }
-        
+
         Ok(Self)
     }
 }
@@ -36,18 +38,23 @@ impl OCREngine for TesseractOCR {
             .arg("tsv")
             .output()
             .map_err(|e| anyhow::anyhow!("Failed to run tesseract: {}", e))?;
-        
+
         if !output.status.success() {
-            anyhow::bail!("Tesseract failed: {}", String::from_utf8_lossy(&output.stderr));
+            anyhow::bail!(
+                "Tesseract failed: {}",
+                String::from_utf8_lossy(&output.stderr)
+            );
         }
-        
+
         let tsv_text = String::from_utf8_lossy(&output.stdout);
         let mut locations = Vec::new();
-        
+
         // Parse TSV output (skip header line)
         for (i, line) in tsv_text.lines().enumerate() {
-            if i == 0 { continue; } // Skip header
-            
+            if i == 0 {
+                continue;
+            } // Skip header
+
             let parts: Vec<&str> = line.split('\t').collect();
             if parts.len() >= 12 {
                 // TSV format: level, page_num, block_num, par_num, line_num, word_num,
@@ -74,10 +81,10 @@ impl OCREngine for TesseractOCR {
                 }
             }
         }
-        
+
         Ok(locations)
     }
-    
+
     fn name(&self) -> &str {
         "Tesseract OCR"
     }

crates/g3-computer-control/src/ocr/vision.rs

@@ -1,6 +1,6 @@
 use super::OCREngine;
 use crate::types::TextLocation;
-use anyhow::{Result, Context};
+use anyhow::{Context, Result};
 use async_trait::async_trait;
 use std::ffi::{CStr, CString};
 use std::os::raw::{c_char, c_float, c_uint};
@@ -24,7 +24,7 @@ extern "C" {
         out_boxes: *mut *mut std::ffi::c_void,
         out_count: *mut c_uint,
     ) -> bool;
-    
+
     fn vision_free_boxes(boxes: *mut std::ffi::c_void, count: c_uint);
 }
 
@@ -41,12 +41,11 @@ impl AppleVisionOCR {
 impl OCREngine for AppleVisionOCR {
     async fn extract_text_with_locations(&self, path: &str) -> Result<Vec<TextLocation>> {
         // Convert path to C string
-        let c_path = CString::new(path)
-            .context("Failed to convert path to C string")?;
-        
+        let c_path = CString::new(path).context("Failed to convert path to C string")?;
+
         let mut boxes_ptr: *mut std::ffi::c_void = std::ptr::null_mut();
         let mut count: c_uint = 0;
-        
+
         // Call Swift Vision API
         let success = unsafe {
             vision_recognize_text(
@@ -56,28 +55,26 @@ impl OCREngine for AppleVisionOCR {
                 &mut count,
             )
         };
-        
+
         if !success || boxes_ptr.is_null() {
             anyhow::bail!("Apple Vision OCR failed");
         }
-        
+
         // Convert C array to Rust Vec
         let mut locations = Vec::new();
-        
+
         unsafe {
             let typed_boxes = boxes_ptr as *const VisionTextBox;
             let boxes_slice = std::slice::from_raw_parts(typed_boxes, count as usize);
-            
+
             for box_data in boxes_slice {
                 // Convert C string to Rust String
                 let text = if !box_data.text.is_null() {
-                    CStr::from_ptr(box_data.text)
-                        .to_string_lossy()
-                        .into_owned()
+                    CStr::from_ptr(box_data.text).to_string_lossy().into_owned()
                 } else {
                     String::new()
                 };
-                
+
                 if !text.is_empty() {
                     locations.push(TextLocation {
                         text,
@@ -89,14 +86,14 @@ impl OCREngine for AppleVisionOCR {
                     });
                 }
             }
-            
+
             // Free the C array
             vision_free_boxes(boxes_ptr, count);
         }
-        
+
         Ok(locations)
     }
-    
+
     fn name(&self) -> &str {
         "Apple Vision Framework"
     }