Add bot graphics

Bots can now show a concept as a visual: create_graphic (with
update_graphic, read_graphic and list_graphics, on every run, no computer
needed) stores one HTML document in bot_graphics, per user like the
conversation, and the chat renders its [graphic:ID] ref as an inline card
sized to fit, with a large view and a page of its own (no rail).

Graphic HTML is treated as hostile: it is only served at /graphics/<id>
with a CSP sandbox allowing scripts under an origin of its own and no
network, loading only the vendored Chart.js and Mermaid from
/graphics-lib/. The document carries the app's theme vars and scrollbars,
reports its height to the thread, and a frame that navigates away is
closed.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/dict/bot-queue-dict.ts

@@ -121,6 +121,10 @@ export const JobStepToolLabels: Record<string, string> = {
     update_instructions: "Updating instructions",
     load_skill: "Reading a skill",
     send_message: "Sending a message",
+    create_graphic: "Drawing a graphic",
+    update_graphic: "Redrawing a graphic",
+    read_graphic: "Reading a graphic",
+    list_graphics: "Looking through graphics",
 };
 
 /**