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.ts

@@ -0,0 +1,78 @@
+import type { BotFace, BotKind } from "@/src/dict/bot-dict";
+
+type CrewBot = {
+    kind?: BotKind | string | null;
+    face?: BotFace | string | null;
+};
+
+type Params = {
+    bots: CrewBot[];
+};
+
+const NUMBER_WORDS = [
+    "No",
+    "One",
+    "Two",
+    "Three",
+    "Four",
+    "Five",
+    "Six",
+    "Seven",
+    "Eight",
+    "Nine",
+    "Ten",
+] as const;
+
+function countWord({ n }: { n: number }): string {
+    return NUMBER_WORDS[n] ?? String(n);
+}
+
+/**
+ * Working and needs-you counts across the workers (the coordinator excluded).
+ */
+export function crewCounts({ bots }: Params) {
+    const workers = bots.filter((bot) => bot.kind !== "coordinator");
+
+    return {
+        working: workers.filter((bot) => bot.face === "working").length,
+        needs_you: workers.filter((bot) => bot.face === "needs-you").length,
+    };
+}
+
+/**
+ * The coordinator's rail subtitle: `3 working · 1 needs you`.
+ */
+export function crewStatusLine({ bots }: Params): string {
+    const { working, needs_you } = crewCounts({ bots });
+    const parts: string[] = [];
+
+    if (working) parts.push(`${working} working`);
+    if (needs_you) parts.push(`${needs_you} need${needs_you == 1 ? "s" : ""} you`);
+
+    return parts.length ? parts.join(" · ") : "All quiet";
+}
+
+/**
+ * The signature status sentence: `Three bots are working. One needs you.`
+ */
+export function crewStatusSentence({ bots }: Params): string {
+    const { working, needs_you } = crewCounts({ bots });
+    const sentences: string[] = [];
+
+    if (working) {
+        sentences.push(
+            working == 1
+                ? `One bot is working.`
+                : `${countWord({ n: working })} bots are working.`,
+        );
+    }
+
+    if (needs_you) {
+        const subject = working
+            ? countWord({ n: needs_you })
+            : `${countWord({ n: needs_you })} bot${needs_you == 1 ? "" : "s"}`;
+        sentences.push(`${subject} need${needs_you == 1 ? "s" : ""} you.`);
+    }
+
+    return sentences.length ? sentences.join(" ") : "Nothing needs you.";
+}