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/dict/bot-dict.ts

@@ -0,0 +1,120 @@
+/**
+ * Bot identity hues. A bot keeps its hue for life; a hue never means state.
+ * The coordinator has no hue.
+ */
+export const BotHues = [
+    {
+        title: "Ember",
+        value: "ember",
+    },
+    {
+        title: "Amber",
+        value: "amber",
+    },
+    {
+        title: "Moss",
+        value: "moss",
+    },
+    {
+        title: "Teal",
+        value: "teal",
+    },
+    {
+        title: "Cobalt",
+        value: "cobalt",
+    },
+    {
+        title: "Violet",
+        value: "violet",
+    },
+    {
+        title: "Rose",
+        value: "rose",
+    },
+] as const;
+
+export type BotHue = (typeof BotHues)[number]["value"];
+
+export const BotKinds = [
+    {
+        title: "Worker",
+        value: "worker",
+    },
+    {
+        title: "Coordinator",
+        value: "coordinator",
+    },
+] as const;
+
+export type BotKind = (typeof BotKinds)[number]["value"];
+
+/**
+ * A bot's face is its status. There are no badges or spinners.
+ */
+export const BotFaces = [
+    {
+        title: "Idle",
+        value: "idle",
+    },
+    {
+        title: "Working",
+        value: "working",
+    },
+    {
+        title: "Done",
+        value: "done",
+    },
+    {
+        title: "Asleep",
+        value: "asleep",
+    },
+    {
+        title: "Needs you",
+        value: "needs-you",
+    },
+] as const;
+
+export type BotFace = (typeof BotFaces)[number]["value"];
+
+export const BotMessageAuthors = [
+    {
+        title: "Bot",
+        value: "bot",
+    },
+    {
+        title: "User",
+        value: "user",
+    },
+] as const;
+
+export type BotMessageAuthor = (typeof BotMessageAuthors)[number]["value"];
+
+export const BotTaskStatuses = [
+    {
+        title: "Active",
+        value: "active",
+    },
+    {
+        title: "Done",
+        value: "done",
+    },
+] as const;
+
+export type BotTaskStatus = (typeof BotTaskStatuses)[number]["value"];
+
+export const BotTaskStepStates = [
+    {
+        title: "Done",
+        value: "done",
+    },
+    {
+        title: "Active",
+        value: "active",
+    },
+    {
+        title: "Pending",
+        value: "pending",
+    },
+] as const;
+
+export type BotTaskStepState = (typeof BotTaskStepStates)[number]["value"];