fix: add Read, Glob, Grep to agent settings.json allowlist

These read-only tools were missing from the locked-down settings,
causing permission prompts to flood Matrix chat for every agent
file read.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/io/fs/scaffold.rs

@@ -83,8 +83,11 @@ const STORY_KIT_CLAUDE_SETTINGS: &str = r#"{
       "Bash(tail *)",
       "Bash(wc *)",
       "Bash(cat *)",
+      "Read",
       "Edit",
       "Write",
+      "Glob",
+      "Grep",
       "mcp__huskies__*"
     ]
   },