Build Cobble project structure from the handoff

- Remove the preset document suite (letters, emails, invoices, quotes,
  PDF generation, line items) with its routes, API handlers and tables
- Rebrand to Cobble: site data, Lato, handoff design tokens (light and
  dark) in main.css, brand assets in public/brand, ember stone logo and
  regenerated favicons
- Add bots, bot_messages, bot_tasks and bot_task_steps tables, regenerate
  DB types (BUN_SQLITE_COBBLE_*) and add a sample crew seed (seed:bots)
- Add the chat shell at /admin/bots: rail with pinned coordinator and
  user popover, bottom-anchored conversation with composer, working-on
  panel, and a send-message API scoped to the session user
- Add BotStone and Wordmark components, crew status and relative time
  utils with tests, and update AGENTS.md

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

src/utils/crew-status.test.ts

@@ -0,0 +1,63 @@
+import { describe, expect, test } from "bun:test";
+import { crewStatusLine, crewStatusSentence } from "./crew-status";
+
+const crew = [
+    { kind: "coordinator", face: "working" },
+    { kind: "worker", face: "needs-you" },
+    { kind: "worker", face: "working" },
+    { kind: "worker", face: "working" },
+    { kind: "worker", face: "working" },
+    { kind: "worker", face: "asleep" },
+];
+
+describe("crewStatusLine", () => {
+    test("counts workers only", () => {
+        expect(crewStatusLine({ bots: crew })).toBe("3 working · 1 needs you");
+    });
+
+    test("pluralises need", () => {
+        expect(
+            crewStatusLine({
+                bots: [
+                    { kind: "worker", face: "needs-you" },
+                    { kind: "worker", face: "needs-you" },
+                ],
+            }),
+        ).toBe("2 need you");
+    });
+
+    test("quiet crew", () => {
+        expect(crewStatusLine({ bots: [{ kind: "worker", face: "done" }] })).toBe(
+            "All quiet",
+        );
+    });
+});
+
+describe("crewStatusSentence", () => {
+    test("the signature sentence", () => {
+        expect(crewStatusSentence({ bots: crew })).toBe(
+            "Three bots are working. One needs you.",
+        );
+    });
+
+    test("single working bot", () => {
+        expect(
+            crewStatusSentence({ bots: [{ kind: "worker", face: "working" }] }),
+        ).toBe("One bot is working.");
+    });
+
+    test("needs you without working bots names the bots", () => {
+        expect(
+            crewStatusSentence({
+                bots: [
+                    { kind: "worker", face: "needs-you" },
+                    { kind: "worker", face: "needs-you" },
+                ],
+            }),
+        ).toBe("Two bots need you.");
+    });
+
+    test("nothing to report", () => {
+        expect(crewStatusSentence({ bots: [] })).toBe("Nothing needs you.");
+    });
+});