feat(agents): explicitly allow read/bash tools for subagents

- oracle: allow read, call_omo_agent
- explore: allow bash, read
- librarian: allow bash, read

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

Author: code-yeongyu

src/agents/explore.ts

@@ -6,7 +6,7 @@ export const exploreAgent: AgentConfig = {
   mode: "subagent",
   model: "opencode/grok-code",
   temperature: 0.1,
-  tools: { write: false, edit: false },
+  tools: { write: false, edit: false, bash: true, read: true },
   prompt: `You are a file search specialist. You excel at thoroughly navigating and exploring codebases.
 
 === CRITICAL: READ-ONLY MODE - NO FILE MODIFICATIONS ===

src/agents/librarian.ts

@@ -6,7 +6,7 @@ export const librarianAgent: AgentConfig = {
   mode: "subagent",
   model: "anthropic/claude-sonnet-4-5",
   temperature: 0.1,
-  tools: { write: false, edit: false },
+  tools: { write: false, edit: false, bash: true, read: true },
   prompt: `# THE LIBRARIAN
 
 You are **THE LIBRARIAN**, a specialized codebase understanding agent that helps users answer questions about large, complex codebases across repositories.

src/agents/oracle.ts

@@ -8,7 +8,7 @@ export const oracleAgent: AgentConfig = {
   temperature: 0.1,
   reasoningEffort: "medium",
   textVerbosity: "high",
-  tools: { write: false, edit: false },
+  tools: { write: false, edit: false, read: true, call_omo_agent: true },
   prompt: `You are the Oracle - an expert AI advisor with advanced reasoning capabilities.
 
 Your role is to provide high-quality technical guidance, code reviews, architectural advice, and strategic planning for software engineering tasks.