add devtools agent tools, fix search field mapping

7 gitea tools: list_repos, get_repo, list_issues, get_issue,
create_issue, list_pulls, get_file. all operate as the requesting
user via PAT impersonation.

tool registry conditionally includes gitea tools when configured.
dispatch uses prefix matching (gitea_*) for clean extension.

fixed search bug: room_name and sender_name filters used .keyword
subfield which doesn't exist on keyword-typed fields — queries
silently returned zero results for all room/sender-filtered searches.

src/tools/mod.rs

@@ -1,4 +1,5 @@
 pub mod bridge;
+pub mod devtools;
 pub mod room_history;
 pub mod room_info;
 pub mod script;
@@ -13,24 +14,36 @@ use serde_json::json;
 
 use crate::config::Config;
 use crate::context::ResponseContext;
+use crate::sdk::gitea::GiteaClient;
 
 pub struct ToolRegistry {
     opensearch: OpenSearch,
     matrix: MatrixClient,
     config: Arc<Config>,
+    gitea: Option<Arc<GiteaClient>>,
 }
 
 impl ToolRegistry {
-    pub fn new(opensearch: OpenSearch, matrix: MatrixClient, config: Arc<Config>) -> Self {
+    pub fn new(
+        opensearch: OpenSearch,
+        matrix: MatrixClient,
+        config: Arc<Config>,
+        gitea: Option<Arc<GiteaClient>>,
+    ) -> Self {
         Self {
             opensearch,
             matrix,
             config,
+            gitea,
         }
     }
 
-    pub fn tool_definitions() -> Vec<Tool> {
-        vec![
+    pub fn has_gitea(&self) -> bool {
+        self.gitea.is_some()
+    }
+
+    pub fn tool_definitions(gitea_enabled: bool) -> Vec<Tool> {
+        let mut tools = vec![
             Tool::new(
                 "search_archive".into(),
                 "Search the message archive. Use this to find past conversations, \
@@ -154,13 +167,19 @@ impl ToolRegistry {
                     "required": ["code"]
                 }),
             ),
-        ]
+        ];
+
+        if gitea_enabled {
+            tools.extend(devtools::tool_definitions());
+        }
+
+        tools
     }
 
     /// Convert Sol's tool definitions to Mistral AgentTool format
     /// for use with the Agents API (orchestrator agent creation).
-    pub fn agent_tool_definitions() -> Vec<mistralai_client::v1::agents::AgentTool> {
-        Self::tool_definitions()
+    pub fn agent_tool_definitions(gitea_enabled: bool) -> Vec<mistralai_client::v1::agents::AgentTool> {
+        Self::tool_definitions(gitea_enabled)
             .into_iter()
             .map(|t| {
                 mistralai_client::v1::agents::AgentTool::function(
@@ -207,6 +226,13 @@ impl ToolRegistry {
                 )
                 .await
             }
+            name if name.starts_with("gitea_") => {
+                if let Some(ref gitea) = self.gitea {
+                    devtools::execute(gitea, name, arguments, response_ctx).await
+                } else {
+                    anyhow::bail!("Gitea integration not configured")
+                }
+            }
             _ => anyhow::bail!("Unknown tool: {name}"),
         }
     }