feat(FN-2996): add research agent tools with extension wiring, remote setti

This merge brings multiple substantial features: new research extension tools wired through the AI engine (with full test coverage and documentation), legacy routines agentId backward compatibility with migration paths, migration of experimental remote settings to the global scope, Nerd Font glyph a

Fusion-Task-Id: FN-2996

docs/agents.md

@@ -121,6 +121,24 @@ Agent deletion is available from both the detail header lifecycle controls and t
 
 ![Agents view](./screenshots/agents-view.png)
 
+## Research Tools in Planning/Execution Sessions
+
+Triage and executor runtime sessions now include a bounded research tool surface:
+
+- `fn_research_run` — create/start a bounded research run for a focused query
+- `fn_research_list` — list recent runs and statuses
+- `fn_research_get` — fetch one run's structured findings payload
+- `fn_research_cancel` — cancel an active run
+
+These tools return structured metadata (`runId`, `status`, `summary`, `findings`, `citations`, `error`, `setup`) in addition to concise text so downstream model steps can consume results deterministically.
+
+Expected behavior and boundaries:
+
+- Agents should use research only when repository/local context is insufficient
+- Queries should stay narrow and task-scoped; avoid open-ended exploration
+- If research is disabled or provider setup is incomplete, tools return actionable `setup` responses instead of crashing
+- Durable conclusions should be persisted with `fn_task_document_write` (for example, `key="research"`)
+
 ## Built-In Agent Prompt Templates
 
 Fusion includes built-in templates for role prompts: