🔧 refactor: simplify update source command and documentation

- Removed the deprecated environment variable setting that forced the local Go toolchain in `update_source.go`.
- Revised documentation for clarity regarding the self-healing build pipeline to reflect the handling of environment-specific issues.
- Streamlined the screenshot directory configuration in `config.go` for improved readability and maintainability.

Author: nathfavour

cmd/vibeaura/update_source.go

@@ -124,10 +124,6 @@ func buildAndInstallFromSource(sourceRoot, branch string, cm *sys.ConfigManager)
 	buildCmd := exec.Command("go", "build", "-ldflags", ldflags, "-o", buildOut, "./cmd/vibeaura")
 	buildCmd.Dir = sourceRoot
 
-	// Force Go to use the locally installed toolchain and avoid automatic downloads
-	// which often fail on mobile/Termux.
-	buildCmd.Env = append(os.Environ(), "GOTOOLCHAIN=local")
-
 	if verbose {
 		buildCmd.Stdout = os.Stdout
 		buildCmd.Stderr = os.Stderr

docs/docs/lifecycle/updates.md

@@ -24,9 +24,8 @@ This is VibeAuracle's "killer feature" for productivity. In the TUI mode:
 
 ## Self-Healing Build Pipeline
 
-Building from source can be brittle, especially on mobile environments like Termux. VibeAuracle includes an autonomous recovery system:
+Building from source can sometimes fail due to environment-specific issues. VibeAuracle includes an autonomous recovery system:
 
-*   **Dependency Injection:** If a build fails on Termux, the tool checks if the Go toolchain is outdated and attempts to run `pkg upgrade golang` automatically.
 *   **Recursive Recovery:** If three consecutive updates fail, the tool enters a "Self-Healing" mode where it deletes its own binary and triggers a fresh installation from the official release script to restore stability.
 
 ## Audit Logs

internal/sys/config.go

@@ -112,13 +112,8 @@ func NewConfigManager() (*ConfigManager, error) {
 	v.SetDefault("prompt.recommendations_sample_rate", 0.02)
 	v.SetDefault("prompt.recommendations_max_per_run", 1)
 
-	// Platform-specific screenshot directory
-	var defaultShotDir string
-	if _, err := os.Stat("/data/data/com.termux/files/usr/bin/bash"); err == nil {
-		defaultShotDir = filepath.Join(home, "downloads", "vibeaura")
-	} else {
-		defaultShotDir = filepath.Join(home, "Downloads", "vibeaura")
-	}
+	// Default screenshot directory
+	defaultShotDir := filepath.Join(home, "Downloads", "vibeaura")
 	v.SetDefault("ui.screenshot_dir", defaultShotDir)
 
 	v.SetDefault("update.build_from_source", false)