idle-draft: per-work-type allowed_tools; research must web-search for stories

Research and topic_ideas runs get --allowedTools WebSearch,WebFetch;
research template mandates >=1 web search for related stories with
full-URL + access-date citations under the dossier's status labels.

Claude-Session: https://claude.ai/code/session_01YQDoWNM7XPPii28khFWoMc

data/idle-draft/prompts/topic-ideas.md

@@ -22,6 +22,17 @@ Do **not** propose anything that duplicates or trivially rephrases one of these:
 
 $existing_titles
 
+## Check current discussion first
+
+You have `WebSearch` available. Before proposing, run at least one `WebSearch`
+to check what is currently being discussed in this dossier's topic area — this
+keeps proposals grounded in what practitioners are actually talking about
+right now, not just what the local evidence dirs already contain. This is a
+lighter-touch check than the research work type's requirement: you do not need
+to cite web sources in the proposal itself (evidence pointers below still come
+from the evidence directories), just use the search to sanity-check relevance
+and avoid pitching something already stale or already covered elsewhere.
+
 ## What to produce
 
 Propose **up to $max_new** new candidate topics for this dossier, each grounded in