fix(linux): read protected CUPS PPD via PolicyKit

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@fieldlens/print",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "private": true,
   "type": "module",
   "scripts": {

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fieldlens-print"
-version = "0.1.8"
+version = "0.1.9"
 description = "FieldLens print-stream barcode capture companion"
 authors = ["Arrowstack"]
 edition = "2021"

src-tauri/src/printers.rs

@@ -537,8 +537,35 @@ fn build_fieldlens_ppd(target_printer: &str) -> Result<PathBuf> {
         ));
     }
 
-    let original = fs::read_to_string(&source)
-        .with_context(|| format!("read target printer PPD {}", source.display()))?;
+    let original = match fs::read_to_string(&source) {
+        Ok(contents) => contents,
+        Err(direct_error) => {
+            // CUPS commonly stores PPDs as root:lp 0640. Desktop users can
+            // enumerate the queue but cannot necessarily read its PPD.
+            // Reuse the existing PolicyKit setup flow for a read-only fallback.
+            let output = Command::new("pkexec")
+                .arg("cat")
+                .arg(&source)
+                .output()
+                .with_context(|| {
+                    format!(
+                        "read target printer PPD {} (direct read failed: {direct_error})",
+                        source.display()
+                    )
+                })?;
+
+            if !output.status.success() {
+                return Err(anyhow!(
+                    "could not read target printer PPD {}: {}",
+                    source.display(),
+                    String::from_utf8_lossy(&output.stderr).trim()
+                ));
+            }
+
+            String::from_utf8(output.stdout)
+                .with_context(|| format!("decode target printer PPD {}", source.display()))?
+        }
+    };
     let mut cleaned = original
         .lines()
         .filter(|line| !line.contains("fieldlens-capture"))

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "FieldLens Print",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "identifier": "dev.arrowstack.fieldlens.print",
   "build": {
     "beforeDevCommand": "npm run dev",

src/main.ts

@@ -85,7 +85,7 @@ let config: AppConfig
 let jobs: Job[] = []
 let status: Status
 let loginTimer: number | undefined
-let currentVersion = '0.1.8'
+let currentVersion = '0.1.9'
 let bundleType: BundleType | null = null
 let availableUpdate: Update | null = null
 let availableManualUpdate: ManualUpdate | null = null