Two selects that never wrote anything, and a queue

The approval card in Auto mode and the missing /effort were one bug. Both
selects hung their hx-patch on an empty sibling form reached by form="…",
and htmx binds a trigger to the annotated element: change fires on the
select and bubbles to its ancestors, which a sibling is not. The live rows
read agent_mode=manual and params_json={} while the browser showed Auto and
Effort: high. policy.py was never involved.

The verb moves onto the control; the empty form stays as value scoping,
which is the half of the CLAUDE.md note that was right. conftest gains
control_named so a test asserts the element carrying the name carries the
verb, rather than asserting the markup that was there throughout.

The composer's highlight was a third instance of the same carelessness in
CSS: .tok-mention is written for the transcript and scoped to nothing, so
the mirror painted its token in accent-coloured monospace over the
textarea's own text. Scoped under .msg; the mirror restates transparency
and font rather than inheriting them, and bleeds by box-shadow.

/effort is now offered before the first prompt and _new_chat reads it.
/index re-walks the project directory on demand, file_write drops the
listing it just invalidated, and the index ladder falls through to SFTP on
a host that refuses exec instead of returning nothing.

A second message during a reply is queued rather than starting a second
concurrent generation: a real Message row with queued set, so it survives a
restart and can be withdrawn. _drain hands one on at the end of a reply,
_inject takes one in at a tool-round boundary so an agent can be steered
mid-task. Stop leaves the queue undelivered. The terminal's Auto toggle
becomes off/copy/send, and send posts straight to the chat without touching
the composer.

@ now offers notes, skills, this chat's attachments and a URL to fetch; a
knowledge base attaches as a reference rather than a copy. copy_document
carries provenance, which was the one attach path that dropped it.

Also fixes an unrelated live bug: the round loop compared against the
global MAX_ROUNDS of 3 while sizing itself from the agent budget of 40, so
agent replies stopped after three rounds and reported forty.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/lembas/web/static/js/composer.js

@@ -273,6 +273,24 @@
     } else if (option.dataset.mentionKnowledge) {
       body.append("document_id", option.dataset.mentionKnowledge);
       attach("/api/files/from-knowledge", body);
+    } else if (option.dataset.mentionNote) {
+      body.append("note_id", option.dataset.mentionNote);
+      attach("/api/files/from-note", body);
+    } else if (option.dataset.mentionSkill) {
+      body.append("skill_id", option.dataset.mentionSkill);
+      attach("/api/files/from-skill", body);
+    } else if (option.dataset.mentionAttachment) {
+      body.append("attachment_id", option.dataset.mentionAttachment);
+      attach("/api/files/from-attachment", body);
+    } else if (option.dataset.mentionUrl) {
+      body.append("url", option.dataset.mentionUrl);
+      attach("/api/files/link", body);
+    } else if (option.dataset.mentionBase) {
+      /* Not an attachment: nothing is copied, and what changes is what this
+         chat is allowed to search. It goes on the chat, so the route is the
+         chat's own. */
+      body.append("base_id", option.dataset.mentionBase);
+      attach("/api/chats/" + where.chatId + "/bases", body);
     }
   }