feat(shop): story-37 target templates beside the hand-lowering

- view.html per feature + layout app/header/footer.html: the markup-
  first form woc will compile ({{}} auto-escaped, w:if/w:for,
  {!! !!} slots, w:component sections); inert today, verified not to
  disturb the build
- README: pair is the DX referendum — .html is the target feel,
  view.wo is today's cost; doctrine line reworded (templates compile
  or don't exist)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/examples/shop/README.md

@@ -29,6 +29,7 @@ it and restart: the orders are still there (WAL replay).
 | `product_page/`, `orders/` | one view module per feature + its root controller file | feature folders |
 | `static_files/controller.wo` | `/assets/*` from disk, traversal-safe, typed | `angular.json` assets |
 | `assets/style.css` | ONE real stylesheet, sectioned per feature | the `.scss` files |
+| `*/view.html`, `layout/*.html` | STORY 37's TARGET — markup-first templates ({{ }} auto-escaped, w:if/w:for, {!! !!} slots) that woc will COMPILE against the view classes; inert today | `.component.html` / Vue `<template>` |
 | `main.wo` | bootstrap: seed, routes, serve — nothing else | `app-routing.module.ts` + `main.ts` |
 
 Separation is compiler-enforced where the language allows it today:
@@ -38,9 +39,12 @@ sit in the root module beside `types.wo`, because of gap #1 below.
 
 ## What is deliberately different (doctrine)
 
-- **No `.html`/`.scss` template files.** Views are `.wo` code — the
-  compiler type-checks them, `esc()` is the one escaping rule, and no
-  template engine runs at request time. Styles stay a real CSS file,
+- **Templates compile or they don't exist (story 37).** The `.html`
+  files here are the TARGET: when 37 lands, `woc` compiles each against
+  its view class (typo'd field = compile error) and the hand-written
+  `render()` methods in `view.wo` disappear. Until then the `.wo` files
+  are the running hand-lowering of exactly that markup, and NO template
+  engine runs at request time — ever. Styles stay a real CSS file,
   served statically (there is no scss preprocessor).
 - **No closures, no DI.** A view is a class with fields + `render()`;
   a controller is a class satisfying `Handler`. Capture = a field.
@@ -64,6 +68,8 @@ sit in the root module beside `types.wo`, because of gap #1 below.
 1. `types.wo` — the entire persistence layer is 20 lines.
 2. `orders.controller.wo` — the whole buying flow (validate, stock
    check, decrement, durable insert, render) with no framework magic.
-3. `product_list/view.wo` — is markup-as-code readable enough without
-   templates? This file is the referendum.
+3. `product_list/view.html` NEXT TO `product_list/view.wo` — the
+   template 37 will compile vs today's hand-lowering. The pair is the
+   referendum: the `.html` is what writing a view will feel like, the
+   `.wo` is what it costs today.
 4. `main.wo` — the app at a glance: five routes, one middleware, serve.

docs/examples/shop/layout/app.html

@@ -0,0 +1,20 @@
+<!-- layout/app.html — STORY 37's TARGET for the app shell: the document
+     every page shares. {!! !!} slots take prebuilt fragments (header,
+     footer, the page content); app.wo is the hand-lowered equivalent. -->
+
+<template w:component="AppShell">
+  <!doctype html>
+  <html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width,initial-scale=1">
+    <title>{{ self.title }}</title>
+    <link rel="stylesheet" href="/assets/style.css">
+  </head>
+  <body>
+    {!! self.header !!}
+    <main class="site-main">{!! self.content !!}</main>
+    {!! self.footer !!}
+  </body>
+  </html>
+</template>

docs/examples/shop/layout/footer.html

@@ -0,0 +1,7 @@
+<!-- layout/footer.html — STORY 37's TARGET; footer.wo hand-lowers it. -->
+
+<template w:component="Footer">
+  <footer class="site-footer">
+    writeonce shop — one binary: server, database, these pages.
+  </footer>
+</template>

docs/examples/shop/layout/header.html

@@ -0,0 +1,11 @@
+<!-- layout/header.html — STORY 37's TARGET; header.wo hand-lowers it. -->
+
+<template w:component="Header">
+  <header class="site-header">
+    <a href="/" class="brand">writeonce shop</a>
+    <nav class="site-nav">
+      <a href="/">Products</a>
+      <a href="/orders">Orders</a>
+    </nav>
+  </header>
+</template>

docs/examples/shop/orders/view.html

@@ -0,0 +1,28 @@
+<!-- orders/view.html — STORY 37's TARGET (see product_list/view.html for
+     the convention). view.wo is the hand-lowered equivalent. -->
+
+<template w:component="OrderOk">
+  <div class="card">
+    <h1>Order placed</h1>
+    <p>{{ self.qty }} × {{ self.name }} — total € {{ self.total }}</p>
+    <p><a href="/orders">See all orders</a> · <a href="/">Keep shopping</a></p>
+  </div>
+</template>
+
+<template w:component="OrderRow">
+  <tr>
+    <td>{{ self.name }}</td>
+    <td>{{ self.qty }}</td>
+    <td>€ {{ self.total }}</td>
+    <td>{{ self.status }}</td>
+  </tr>
+</template>
+
+<template w:component="OrdersPage">
+  <h1>Orders</h1>
+  <p w:if="self.rows == ''">No orders yet — <a href="/">go buy something</a>.</p>
+  <table w:if="self.rows != ''" class="orders">
+    <tr><th>Product</th><th>Qty</th><th>Total</th><th>Status</th></tr>
+    {!! self.rows !!}
+  </table>
+</template>

docs/examples/shop/product_list/view.html

@@ -0,0 +1,20 @@
+<!-- product_list/view.html — STORY 37's TARGET, not yet compiled.
+     When 37 lands, woc compiles this file against the view classes in
+     view.wo; until then view.wo's render() methods are the HAND-LOWERED
+     equivalent of exactly this markup. Notation ({{ }} auto-escaped,
+     {!! !!} raw slot, w:if / w:for) is illustrative — 37's spec settles
+     the final spelling. -->
+
+<template w:component="ProductCard">
+  <div class="card">
+    <h3><a href="/p/{{ self.sku }}">{{ self.name }}</a></h3>
+    <p class="price">€ {{ self.price }}</p>
+    <p w:if="self.stock > 0" class="stock">{{ self.stock }} in stock</p>
+    <p w:if="self.stock == 0" class="stock out">sold out</p>
+  </div>
+</template>
+
+<template w:component="ProductListPage">
+  <h1>Products</h1>
+  <div class="grid">{!! self.cards !!}</div>
+</template>

docs/examples/shop/product_page/view.html

@@ -0,0 +1,18 @@
+<!-- product_page/view.html — STORY 37's TARGET (see product_list/view.html
+     for the convention). view.wo is the hand-lowered equivalent. -->
+
+<template w:component="ProductPage">
+  <div class="card detail">
+    <h1>{{ self.name }}</h1>
+    <p class="price">€ {{ self.price }}</p>
+    <p class="stock">{{ self.stock }} in stock</p>
+
+    <form w:if="self.stock > 0" method="POST" action="/orders/{{ self.sku }}">
+      <label>Quantity</label>
+      <input type="text" name="qty" value="1" class="field">
+      <button type="submit" class="btn">Buy</button>
+    </form>
+    <p w:if="self.stock == 0" class="stock out">sold out</p>
+  </div>
+  <p><a href="/">← all products</a></p>
+</template>