Update templates and docs for camelCase JSX attributes

Fix onclick→onClick in template routes (counter, dashboard).
Add JSX attribute casing rules to anti-patterns.
Update template CLAUDE.md with srcSet/fetchPriority guidance.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vitbokisch

.claude/rules/anti-patterns.md

@@ -12,6 +12,12 @@
 - **Never** call `signal(value)` to set — use `signal.set(value)` or `signal.update(fn)`
 - **Never** forget to call signal as function to read: use `count()` not `count`
 
+## JSX attribute casing
+- **Always** use camelCase for JSX attributes: `onClick`, `onMouseEnter`, `onTouchStart`, `onLoad`
+- **Never** use lowercase DOM event names: `onclick`, `onmouseenter`, `ontouchstart`, `onload`
+- **Always** use `srcSet` not `srcset`, `fetchPriority` not `fetchpriority`
+- **Always** use `className` → `class`, `htmlFor` → `for` (Pyreon uses HTML names, not React names)
+
 ## JSX reactive expressions
 - **Never** use bare signal reads in JSX text — wrap in arrow: `{() => count()}` not `{count()}`
 - **Never** return `undefined` from reactive JSX attributes — return empty string `''` instead

packages/create-zero/templates/default/CLAUDE.md

@@ -15,10 +15,12 @@ This project uses Pyreon Zero, a signal-based full-stack meta-framework. Do NOT
 
 - Use `class=` not `className`
 - Use `for=` not `htmlFor`
+- Use camelCase events: `onClick`, `onMouseEnter`, `onLoad` (not `onclick`, `onmouseenter`)
+- Use `srcSet` not `srcset`, `fetchPriority` not `fetchpriority`
 - Reactive text: `{() => count()}`
 - Conditional: `{() => show() ? <A /> : null}`
 - Lists: `{() => items().map(item => <Item />)}`
-- Events: `onClick={() => ...}` (standard DOM events)
+- Events: `onClick={() => ...}`
 - JSX import source is `@pyreon/core` (auto-configured, no manual import needed)
 
 ## File-Based Routing

packages/create-zero/templates/default/src/routes/(admin)/dashboard.tsx

@@ -110,7 +110,7 @@ export default function Dashboard() {
         <button
           type="button"
           class="btn btn-secondary"
-          onclick={() => {
+          onClick={() => {
             localStorage.removeItem('zero-demo-auth')
             window.location.href = '/about'
           }}

packages/create-zero/templates/default/src/routes/counter.tsx

@@ -31,21 +31,21 @@ export default function Counter() {
           <button
             type="button"
             class="btn btn-secondary"
-            onclick={() => count.update((n) => n - 1)}
+            onClick={() => count.update((n) => n - 1)}
           >
             -
           </button>
           <button
             type="button"
             class="btn btn-primary"
-            onclick={() => count.set(0)}
+            onClick={() => count.set(0)}
           >
             Reset
           </button>
           <button
             type="button"
             class="btn btn-secondary"
-            onclick={() => count.update((n) => n + 1)}
+            onClick={() => count.update((n) => n + 1)}
           >
             +
           </button>