chore: 调整配置并精简实验选项

oh-my-opencode.jsonc

@@ -26,10 +26,5 @@
   "git_master": {
     "commit_footer": false,
     "include_co_authored_by": false
-  },
-  "experimental": {
-    "dynamic_context_pruning": {
-      "enabled": true
-    }
   }
 }

opencode.jsonc

@@ -3,10 +3,10 @@
   "autoupdate": false,
   "model": "anthropic/claude-opus-4-6",
   "small_model": "anthropic/claude-haiku-4-5",
-  "plugin": ["oh-my-opencode@latest"],
   "experimental": {
     "disable_paste_summary": true
   },
+  "plugin": ["oh-my-opencode@latest"],
   "provider": {
     "anthropic": {
       "npm": "@ai-sdk/anthropic",
@@ -45,7 +45,7 @@
         "gpt-5.4": {
           "name": "GPT-5.4",
           "reasoning": true,
-          "modalities": { "input": ["text", "image"], "output": ["text"] },
+          "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
           "limit": { "context": 1050000, "input": 922000, "output": 128000 }
         },
         "gpt-5.3-codex": {