fix: parse tool_use/tool_result messages and add OpenCode SQLite backend (#1401)

* fix: parse tool_use/tool_result messages and add OpenCode SQLite backend

  - Claude: reclassify user messages containing tool_result as "tool" role
  - Codex: handle function_call and function_call_output payload types
  - Gemini: support array content and toolCalls extraction, filter info/error types
  - OpenCode: add SQLite session scan, load and delete alongside legacy JSON
  - utils: extend parse_timestamp_to_ms for integer timestamps, extract tool_use/tool_result in shared extract_text

* fix: address remaining issues from tool_use/tool_result parsing commit
  - Claude: fix role misclassification for mixed user+tool_result messages (any → all)
  - OpenCode: extract duplicate part text logic into extract_part_text()
  - OpenCode: add path validation for SQLite delete to prevent foreign DB access
  - OpenCode: wrap SQLite deletion in transaction for atomicity
  - openclaw_config: remove redundant as_deref() on Option<&str>

src-tauri/src/openclaw_config.rs

@@ -294,7 +294,7 @@ impl OpenClawConfigDocument {
 
         if let Some(existing) = key_value_pairs
             .iter_mut()
-            .find(|pair| json5_key_name(&pair.key).as_deref() == Some(key))
+            .find(|pair| json5_key_name(&pair.key) == Some(key))
         {
             existing.value = new_value;
             return Ok(());