feat(gui): Implement on-demand definition lookup with clickable navigation and collapsing

config.toml

@@ -1,6 +1,6 @@
 [ai]
-provider = "deepseek"
-model = "deepseek-chat"
+provider = "gemini"
+model = "gemini-2.5-flash-lite"
 temperature = 0.0
 max_tokens = 8192
 history_trunc_limit = 8000
@@ -34,8 +34,8 @@ separate_tool_calls_panel = false
 "Tier 4: QA" = true
 "Discussion Hub" = true
 "Operations Hub" = true
-Message = true
-Response = true
+Message = false
+Response = false
 "Tool Calls" = true
 Theme = true
 "Log Management" = true