fix: proper OpenCode v1.1.1 permission migration (#490)

* fix: implement proper version-aware permission format for OpenCode v1.1.1

- Rewrite permission-compat.ts with runtime version detection
- createAgentToolRestrictions() returns correct format per version
- v1.1.1+ uses permission format, older uses tools format
- Add migrateToolsToPermission/migratePermissionToTools helpers
- Update test suite for new API

🤖 Generated with assistance of OhMyOpenCode
https://github.com/code-yeongyu/oh-my-opencode

* fix: update all agents to use createAgentToolRestrictions()

- Replace hardcoded tools: { X: false } format with version-aware utility
- All agents now use createAgentToolRestrictions([...])
- Ensures compatibility with both old and new OpenCode versions

🤖 Generated with assistance of OhMyOpenCode
https://github.com/code-yeongyu/oh-my-opencode

* fix: add runtime migration for user agent configs in config-handler

Migrate tools/permission format in user/project/plugin agent configs
based on detected OpenCode version at load time.

🤖 Generated with [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/agents/oracle.ts

@@ -1,6 +1,7 @@
 import type { AgentConfig } from "@opencode-ai/sdk"
 import type { AgentPromptMetadata } from "./types"
 import { isGptModel } from "./types"
+import { createAgentToolRestrictions } from "../shared/permission-compat"
 
 const DEFAULT_MODEL = "openai/gpt-5.2"
 
@@ -97,22 +98,28 @@ Organize your final answer in three tiers:
 Your response goes directly to the user with no intermediate processing. Make your final message self-contained: a clear recommendation they can act on immediately, covering both what to do and why.`
 
 export function createOracleAgent(model: string = DEFAULT_MODEL): AgentConfig {
+  const restrictions = createAgentToolRestrictions([
+    "write",
+    "edit",
+    "task",
+    "background_task",
+  ])
+
   const base = {
     description:
       "Expert technical advisor with deep reasoning for architecture decisions, code analysis, and engineering guidance.",
     mode: "subagent" as const,
     model,
     temperature: 0.1,
-    tools: { write: false, task: false, background_task: false },
-    permission: { edit: "deny" as const },
+    ...restrictions,
     prompt: ORACLE_SYSTEM_PROMPT,
-  }
+  } as AgentConfig
 
   if (isGptModel(model)) {
-    return { ...base, reasoningEffort: "medium", textVerbosity: "high" }
+    return { ...base, reasoningEffort: "medium", textVerbosity: "high" } as AgentConfig
   }
 
-  return { ...base, thinking: { type: "enabled", budgetTokens: 32000 } }
+  return { ...base, thinking: { type: "enabled", budgetTokens: 32000 } } as AgentConfig
 }
 
 export const oracleAgent = createOracleAgent()