feat: add MycroZine Generator shape with 5-phase workflow

Implements interactive 8-page zine creation tool:
- Phase 1: Ideation - chat UI for topic/content planning
- Phase 2: Drafts - generates 8 pages, spawns on canvas
- Phase 3: Feedback - approve/edit individual pages
- Phase 4: Finalizing - regenerate pages with feedback
- Phase 5: Complete - print layout download, template save

Features:
- Style selector (punk-zine, minimal, collage, retro, academic)
- Tone selector (rebellious, playful, informative, poetic)
- Chat-based ideation workflow
- Page grid with approval/feedback UI
- LocalStorage template persistence
- Punk green (#00ff00) theme

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/routes/Board.tsx

@@ -19,6 +19,8 @@ import { unfurlBookmarkUrl } from "../utils/unfurlBookmarkUrl"
 import { handleInitialPageLoad } from "@/utils/handleInitialPageLoad"
 import { MycrozineTemplateTool } from "@/tools/MycrozineTemplateTool"
 import { MycrozineTemplateShape } from "@/shapes/MycrozineTemplateShapeUtil"
+import { MycroZineGeneratorTool } from "@/tools/MycroZineGeneratorTool"
+import { MycroZineGeneratorShape } from "@/shapes/MycroZineGeneratorShapeUtil"
 import {
   registerPropagators,
   ChangePropagator,
@@ -144,6 +146,7 @@ const customShapeUtils = [
   EmbedShape,
   SlideShape,
   MycrozineTemplateShape,
+  MycroZineGeneratorShape,
   MarkdownShape,
   PromptShape,
   ObsNoteShape,
@@ -168,6 +171,7 @@ const customTools = [
   EmbedTool,
   SlideShapeTool,
   MycrozineTemplateTool,
+  MycroZineGeneratorTool,
   MarkdownTool,
   PromptShapeTool,
   GestureTool,

src/tools/MycroZineGeneratorTool.ts

@@ -0,0 +1,7 @@
+import { BaseBoxShapeTool } from "tldraw"
+
+export class MycroZineGeneratorTool extends BaseBoxShapeTool {
+  static override id = "MycroZineGenerator"
+  static override initial = "idle"
+  override shapeType = "MycroZineGenerator"
+}