feat(website): pace the projects cast + show table state; record cast guidelines

Projects cast review fixes:
- Pace the confirms: `save as` name and `new` now type, pause, then Enter as
  separate steps, so the viewer can read them before they execute.
- Insert `show tables` at each phase (before save / after `new` / after load),
  since the schema sidebar is hidden at 90 cols (ADR-0046) — the sequence now
  reads "books -> no tables -> books" so the round-trip is followable.

STYLE.md: new "Cast pacing & clarity" guidelines (beat-before-submit; surface
state where the sidebar would). Handoff item 2: chase these up across the
existing casts.

website/casts-src/casts.mjs

@@ -30,14 +30,20 @@ export const casts = [
       { wait: 1000 },
       { type: 'create table books with pk', after: 600 },
       { type: 'add column to books: title (text)', after: 700 },
-      { type: "insert into books (title) values ('A Wizard of Earthsea')", after: 700 },
-      { type: 'show data books', after: 1500 }, // a saved project with content
-      { type: 'save as', after: 900 }, // opens the name prompt
-      { type: 'library', enter: true, after: 1500 }, // name it → saved as "library"
-      { type: 'new', after: 1500 }, // start fresh — the table is gone
-      { type: 'load', after: 1200 }, // opens the project picker
-      { type: 'j', enter: false, after: 1000 }, // move the selection to "library"
-      { key: 'Enter', after: 2000 }, // load it — the table is back
+      { type: "insert into books (title) values ('A Wizard of Earthsea')", after: 800 },
+      { type: 'show tables', after: 2000 }, // the project has a "books" table
+      // save-as: type the name, PAUSE so the viewer reads it, then confirm.
+      { type: 'save as', after: 1100 }, // opens the name prompt
+      { type: 'library', enter: false, after: 1500 }, // type the name (no Enter yet)
+      { key: 'Enter', after: 1600 }, // confirm → saved as "library"
+      // new: type it, pause, then run — so "new" registers before it executes.
+      { type: 'new', enter: false, after: 1100 },
+      { key: 'Enter', after: 1500 },
+      { type: 'show tables', after: 2200 }, // fresh project — no tables
+      { type: 'load', after: 1300 }, // opens the project picker
+      { type: 'j', enter: false, after: 1100 }, // move the selection to "library"
+      { key: 'Enter', after: 1800 }, // load it
+      { type: 'show tables', after: 2200 }, // "books" is back
       { key: 'CtrlC' }, // quit invisibly (Ctrl-C) — cast ends on the last content frame
     ],
   },