fix(runtime-fallback): sort agent names by length to fix hyphenated agent detection

The \b word boundary regex treats '-' as a boundary, causing
'sisyphus-junior-session-123' to incorrectly match 'sisyphus'
instead of 'sisyphus-junior'.

Sorting agent names by length (descending) ensures longer names
are matched first, fixing the hyphenated agent detection issue.

Fixes cubic-dev-ai review issue #8

src/hooks/runtime-fallback/index.ts

@@ -131,7 +131,10 @@ function getFallbackModelsForSession(
     "multimodal-looker",
   ]
   const agentPattern = new RegExp(
-    `(?:^|[^a-zA-Z0-9_-])(${AGENT_NAMES.map((a) => a.replace(/-/g, "\\-")).join("|")})(?:$|[^a-zA-Z0-9_-])`,
+    `(?:^|[^a-zA-Z0-9_-])(${AGENT_NAMES
+      .sort((a, b) => b.length - a.length)
+      .map((a) => a.replace(/-/g, "\\-"))
+      .join("|")})(?:$|[^a-zA-Z0-9_-])`,
     "i",
   )
   const sessionAgentMatch = sessionID.match(agentPattern)