feat: add tool scoping and orchestration markers to agent tool registry

Introduce `mark_orchestration_tools`, `set_tool_scope`, and `reset_tool_scope` in `agents/agent.py` to allow runtime filtering of tool payloads by scope and orchestration flag. Refactor `get_tool_payloads` to respect the active scope and exclude orchestration-only tools. Update `agents/core/__init__.py` with `worker_tool_names` helper that returns read/reasoning tools plus conditional write/verify tools per mode, replacing the old `payloads_for` exclusion logic. Modify `agents/maestro.py` to call `mark_orchestration_tools` and wire per-agent result recording via `on_result` callback in `run_fleet`. Extend `agents/orchestrator.py` `run_fleet` signature to accept an optional `on_result` callable and invoke it after each agent run. Revise `agents/style.py` em-dash rule to distinguish prose from data occurrences, and add repository layout guidance to `agents/base.py` MAINT_HEADER.

devplacepy/static/css/docs.css

@@ -538,7 +538,7 @@ pre.code-pre > .code-gutter {
     text-align: right;
     white-space: pre;
     user-select: none;
-    color: #5c6370;
+    color: var(--text-muted);
     background: rgba(0, 0, 0, 0.22);
     border-right: 1px solid rgba(255, 255, 255, 0.08);
     font: inherit;
@@ -557,7 +557,7 @@ pre.code-has-copy > .code-copy-btn {
     z-index: 1;
     padding: 0.2rem 0.6rem;
     font-size: 0.7rem;
-    color: #abb2bf;
+    color: var(--text-secondary);
     background: rgba(40, 44, 52, 0.9);
     border: 1px solid rgba(255, 255, 255, 0.14);
     border-radius: var(--radius);

devplacepy/static/css/markdown.css

@@ -111,8 +111,8 @@
 .rendered-content pre code {
     display: block;
     padding: 1rem;
-    background: #1a1a2e;
-    color: #e0e0e0;
+    background: var(--bg-secondary);
+    color: var(--text-primary);
     font-size: 0.8125rem;
     line-height: 1.5;
     border-radius: var(--radius);