fix(droid-control): repair YAML frontmatter of command files

plugins/droid-control/commands/demo.md

@@ -1,6 +1,6 @@
 ---
 description: Plan and record a demo video of a feature or PR
-argument-hint: "<PR-number> [-- notes]" or "<description of what to demo>"
+argument-hint: '"<PR-number> [-- notes]" or "<description of what to demo>"'
 ---
 
 Load skills: **droid-control**.

plugins/droid-control/commands/qa-test.md

@@ -1,6 +1,6 @@
 ---
 description: Run an automated QA test flow against a terminal CLI or web/Electron app
-argument-hint: "<URL>" or "<app-name>" or "<PR-number> [-- focus area]" or "<description>"
+argument-hint: '"<URL>" or "<app-name>" or "<PR-number> [-- focus area]" or "<description>"'
 ---
 
 Load skills: **droid-control**.

plugins/droid-control/commands/verify.md

@@ -1,6 +1,6 @@
 ---
 description: Test a claim about behavior and report whether the evidence supports or refutes it
-argument-hint: "<claim to test>" or "<PR-number> -- <specific claim>"
+argument-hint: '"<claim to test>" or "<PR-number> -- <specific claim>"'
 ---
 
 Load skills: **droid-control**.