claude-code: mark hook scripts executable

Inline hooks are scripts, so write them with the executable bit set. Add NMT assertions covering default and custom config directories.

modules/programs/claude-code.nix

@@ -558,10 +558,14 @@ in
           name: content: nameValuePair "${cfg.configDir}/${subdir}/${name}.md" (mkSourceEntry content)
         ) attrs;
 
-      mkTextEntries =
-        subdir: attrs:
+      mkHookEntries =
+        attrs:
         lib.mapAttrs' (
-          name: content: nameValuePair "${cfg.configDir}/${subdir}/${name}" { text = content; }
+          name: content:
+          nameValuePair "${cfg.configDir}/hooks/${name}" {
+            text = content;
+            executable = true;
+          }
         ) attrs;
 
       mkRecursiveDirAttrs =
@@ -727,7 +731,7 @@ in
               recursive = true;
             };
           })
-          (mkTextEntries "hooks" cfg.hooks)
+          (mkHookEntries cfg.hooks)
           (lib.optionalAttrs (builtins.isAttrs cfg.skills) (lib.mapAttrs' mkSkillEntry cfg.skills))
           (mkMarkdownEntries "output-styles" cfg.outputStyles)
         ];

tests/modules/programs/claude-code/config-dir.nix

@@ -66,6 +66,7 @@
     assertFileExists home-files/.config/claude/commands/hello.md
     assertFileExists home-files/.config/claude/rules/style.md
     assertFileExists home-files/.config/claude/hooks/pre-edit
+    assertFileIsExecutable home-files/.config/claude/hooks/pre-edit
     assertFileExists home-files/.config/claude/output-styles/concise.md
     assertFileExists home-files/.config/claude/skills/pdf/SKILL.md
 

tests/modules/programs/claude-code/full-config.nix

@@ -135,9 +135,11 @@
     assertFileContent home-files/.claude/commands/commit.md ${./expected-commit}
 
     assertFileExists home-files/.claude/hooks/pre-edit
+    assertFileIsExecutable home-files/.claude/hooks/pre-edit
     assertFileRegex home-files/.claude/hooks/pre-edit "About to edit file"
 
     assertFileExists home-files/.claude/hooks/post-commit
+    assertFileIsExecutable home-files/.claude/hooks/post-commit
     assertFileRegex home-files/.claude/hooks/post-commit "Committed with message"
   '';
 }