Revert to Safari as default WebDriver browser

Chrome headless has too many issues:
- Session creation hangs when Chrome is already running
- Cloudflare and other bot protection blocks headless browsers
- Version mismatch issues between Chrome and ChromeDriver

Safari is more reliable for web automation on macOS.
Chrome headless is still available via --chrome-headless flag.

README.md

@@ -245,7 +245,7 @@ See `config.example.toml` for a complete configuration example.
 
 ## WebDriver Browser Automation
 
-G3 includes WebDriver support for browser automation tasks. Chrome headless is the default (no visible browser window), with Safari available as an alternative.
+G3 includes WebDriver support for browser automation tasks. Safari is the default, with Chrome headless available as an alternative.
 
 **One-Time Setup** (macOS only):
 
@@ -266,11 +266,11 @@ safaridriver --enable  # Requires password
 **Usage**:
 
 ```bash
-# Use Chrome in headless mode (default, no visible window, runs in background)
+# Use Safari (default, opens a visible browser window)
 g3 --webdriver
 
-# Use Safari (opens a visible browser window)
+# Use Chrome in headless mode (no visible window, runs in background)
-g3 --webdriver --safari
+g3 --chrome-headless
 ```
 
 **Chrome Setup Options**:

config.example.toml

@@ -106,10 +106,10 @@ max_actions_per_second = 5
 enabled = false
 safari_port = 4444
 chrome_port = 9515
-# Browser to use: "safari" or "chrome-headless" (default)
+# Browser to use: "safari" (default) or "chrome-headless"
 # Safari opens a visible browser window
 # Chrome headless runs in the background without a visible window
-browser = "chrome-headless"
+browser = "safari"
 # Optional: Path to Chrome binary (e.g., Chrome for Testing)
 # If not set, ChromeDriver will use the default Chrome installation
 # Use this to avoid version mismatch issues between Chrome and ChromeDriver

crates/g3-cli/src/lib.rs

@@ -343,11 +343,11 @@ pub struct Cli {
     #[arg(long)]
     pub webdriver: bool,
 
-    /// Use Chrome in headless mode for WebDriver (this is the default)
+    /// Use Chrome in headless mode for WebDriver (instead of Safari)
     #[arg(long)]
     pub chrome_headless: bool,
 
-    /// Use Safari for WebDriver (instead of headless Chrome)
+    /// Use Safari for WebDriver (this is the default)
     #[arg(long)]
     pub safari: bool,
 

crates/g3-config/src/lib.rs

@@ -119,9 +119,9 @@ pub struct ComputerControlConfig {
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Default)]
 #[serde(rename_all = "lowercase")]
 pub enum WebDriverBrowser {
+    #[default]
     Safari,
     #[serde(rename = "chrome-headless")]
-    #[default]
     ChromeHeadless,
 }
 
@@ -157,7 +157,7 @@ impl Default for WebDriverConfig {
             safari_port: 4444,
             chrome_port: 9515,
             chrome_binary: None,
-            browser: WebDriverBrowser::ChromeHeadless,
+            browser: WebDriverBrowser::Safari,
         }
     }
 }