Fix baseline tests for list_apps env resolution and digest fallback

Author: ranfdev

src/backends/distrobox/distrobox.rs

@@ -1265,9 +1265,10 @@ Categories=Utility;Network;";
 
         let db = Distrobox::new(
             NullCommandRunnerBuilder::new()
-                .cmd(&["printenv", "HOME"], "/home/me")
-                .cmd(&["printenv", "XDG_DATA_HOME"], "")
-                .cmd(&["printenv", "HOME"], "/home/me")
+                .cmd(
+                    &["env", "-0"],
+                    "HOME=/home/me\0XDG_DATA_HOME=/home/me/.local/share\0",
+                )
                 .cmd(
                     &["ls", "/home/me/.local/share/applications"],
                     "ubuntu-vim.desktop\n",
@@ -1319,9 +1320,10 @@ Categories=Utility;Security;";
 
         let db = Distrobox::new(
             NullCommandRunnerBuilder::new()
-                .cmd(&["printenv", "HOME"], "/home/me")
-                .cmd(&["printenv", "XDG_DATA_HOME"], "")
-                .cmd(&["printenv", "HOME"], "/home/me")
+                .cmd(
+                    &["env", "-0"],
+                    "HOME=/home/me\0XDG_DATA_HOME=/home/me/.local/share\0",
+                )
                 .cmd(
                     &["ls", "/home/me/.local/share/applications"],
                     "ubuntu-Proton Authenticator.desktop\n",

src/dialogs/create_distrobox_helpers.rs

@@ -164,7 +164,15 @@ pub fn derive_image_prefill(
                 }
             }
 
-            // 2) collect numeric-version tags
+            // 2) prefer digest-pinned candidates as provided by the source ordering
+            for img in &matching {
+                let (_repo, _tag_opt, digest_opt) = split_repo_tag_digest(img.as_str());
+                if digest_opt.is_some() {
+                    return (filter, Some((*img).clone()));
+                }
+            }
+
+            // 3) collect numeric-version tags
             let mut semvers: Vec<(&String, Vec<u64>)> = Vec::new();
             for img in &matching {
                 let (_repo, tag_opt, _digest) = split_repo_tag_digest(img.as_str());
@@ -193,7 +201,7 @@ pub fn derive_image_prefill(
                 return (filter, Some(semvers[0].0.clone()));
             }
 
-            // 3) fallback: pick first non-edge matching
+            // 4) fallback: pick first non-edge matching
             for img in &matching {
                 let (_repo, tag_opt, _digest) = split_repo_tag_digest(img.as_str());
                 if let Some(tag) = tag_opt {