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/scripts/seed-super-admin.tsx

@@ -1,7 +1,7 @@
 import BunSQLite from "@moduletrace/bun-sqlite";
 import type {
-    BUN_SQLITE_BSQLITE_USER_TYPES,
-    BUN_SQLITE_BSQLITE_USERS,
+    BUN_SQLITE_COBBLE_USER_TYPES,
+    BUN_SQLITE_COBBLE_USERS,
     BunSQLiteTables,
 } from "@/db/types/db";
 
@@ -15,7 +15,7 @@ const USERNAME =
 async function seedSuperAdmin() {
     const existing = (
         await BunSQLite.select<
-            BUN_SQLITE_BSQLITE_USERS,
+            BUN_SQLITE_COBBLE_USERS,
             (typeof BunSQLiteTables)[number]
         >({
             table: "users",
@@ -34,7 +34,7 @@ async function seedSuperAdmin() {
         console.log(`User #${user_id} [${EMAIL}] already exists.`);
     } else {
         const insert_res = await BunSQLite.insert<
-            BUN_SQLITE_BSQLITE_USERS,
+            BUN_SQLITE_COBBLE_USERS,
             (typeof BunSQLiteTables)[number]
         >({
             table: "users",
@@ -67,7 +67,7 @@ async function seedSuperAdmin() {
 
     const has_super_admin = (
         await BunSQLite.select<
-            BUN_SQLITE_BSQLITE_USER_TYPES,
+            BUN_SQLITE_COBBLE_USER_TYPES,
             (typeof BunSQLiteTables)[number]
         >({
             table: "user_types",
@@ -86,7 +86,7 @@ async function seedSuperAdmin() {
     }
 
     const type_res = await BunSQLite.insert<
-        BUN_SQLITE_BSQLITE_USER_TYPES,
+        BUN_SQLITE_COBBLE_USER_TYPES,
         (typeof BunSQLiteTables)[number]
     >({
         table: "user_types",