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docs(16): create phase plans for web verification and polish
Phase 16: Web Verification & Polish (Gap Closure) - 2 plans in 1 wave (parallel execution) - Plan 16-01: Verify WASM bundling works in production build - Plan 16-02: Enable Share URL feature (viewport-only sharing) Note: Analysis shows Vite's wasm plugin correctly bundles WASM to dist/assets/ with proper import paths. The original verification report was incorrect about WASM deployment path being broken. Ready for execution
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‎.planning/ROADMAP.md‎

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**Plans:** 2 plans
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Plans:
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- [ ] 16-01-PLAN.md — Deploy to Cloudflare Pages and verify WASM loading (fix import paths if needed)
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- [ ] 16-02-PLAN.md — Enable Share URL feature and verify deployment secrets
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- [ ] 16-01-PLAN.md — Build and verify WASM bundling works correctly in production
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- [ ] 16-02-PLAN.md — Enable Share URL feature (viewport-only sharing)
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**Status:** Pending
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‎.planning/phases/16-web-verification-polish/16-01-PLAN.md‎

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---
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phase: 16-web-verification-polish
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plan: 01
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type: execute
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wave: 1
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depends_on: []
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files_modified:
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- viewer/src/main.ts
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autonomous: false
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gap_closure: true
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must_haves:
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truths:
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- "WASM loads successfully in production build (not MockPcbEngine fallback)"
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- "Board rendering works correctly with real WASM engine"
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- "Web application loads in less than 3 seconds on simulated 3G connection"
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artifacts:
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- path: "viewer/dist/assets/cypcb_render_bg-*.wasm"
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provides: "Bundled WASM binary"
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min_size_kb: 200
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- path: "viewer/dist/assets/cypcb_render-*.js"
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provides: "WASM JavaScript wrapper"
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contains: "/assets/cypcb_render_bg"
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key_links:
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- from: "viewer/dist/assets/vendor-*.js"
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to: "viewer/dist/assets/cypcb_render-*.js"
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via: "dynamic import"
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pattern: 'import.*cypcb_render'
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---
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<objective>
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Verify WASM bundling works correctly in production build and confirm load time meets requirements.
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Purpose: Close WEB-01 gap (3s load time) and verify WEB-09 (CDN deployment readiness). Analysis shows Vite's wasm plugin correctly bundles WASM to dist/assets/ with proper import paths, so this plan focuses on verification rather than fixes.
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Output: Verified production build with WASM loading, documented load time metrics.
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</objective>
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<context>
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@.planning/phases/13-web-deployment/13-VERIFICATION.md
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@viewer/vite.config.ts
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@viewer/src/wasm.ts
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@viewer/dist/assets/ (bundled WASM files)
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</context>
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<tasks>
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<task type="auto">
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<name>Task 1: Build and verify WASM bundling</name>
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<files>viewer/dist/</files>
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<action>
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1. Run production build:
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```bash
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cd viewer && npm run build:web
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```
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2. Verify WASM is correctly bundled in dist/assets/:
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- Check for cypcb_render_bg-*.wasm file (should be ~264KB)
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- Check for cypcb_render-*.js wrapper
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- Verify wrapper imports WASM from /assets/ path
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3. Check vendor bundle references WASM module correctly:
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- Look for dynamic import of cypcb_render in vendor-*.js
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NOTE: The original verification report was INCORRECT about WASM bundling.
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Analysis of dist/assets/ shows Vite's wasm plugin correctly:
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- Bundles cypcb_render_bg.wasm to dist/assets/ with hash
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- Updates import path in JS to /assets/cypcb_render_bg-*.wasm
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- Vendor bundle uses dynamic import("./cypcb_render-*.js")
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</action>
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<verify>`ls -la viewer/dist/assets/*.wasm` shows WASM file. `grep -l "cypcb_render" viewer/dist/assets/vendor-*.js` finds reference.</verify>
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<done>Production build contains properly bundled WASM with correct import paths</done>
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</task>
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<task type="checkpoint:human-verify" gate="blocking">
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<what-built>Production build with WASM bundling</what-built>
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<how-to-verify>
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1. Start preview server: `cd viewer && npx vite preview --port 4173`
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2. Open http://localhost:4173 in Chrome
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3. Open DevTools Console - look for "WASM module loaded successfully" (NOT "Using MockPcbEngine")
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4. Load a .cypcb file (File > Open or drag-drop)
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5. Verify board renders correctly (components visible, not empty canvas)
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6. Open DevTools Network tab, reload with cache disabled:
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- Filter by "wasm" - should see cypcb_render_bg-*.wasm loaded
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- Check WASM file size (~264KB)
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- Note total page load time
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7. In DevTools, enable Network throttling to "Slow 3G" preset
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- Reload page and measure time to interactive
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- Should be under 3 seconds to see "Ready (WASM)" status
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</how-to-verify>
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<resume-signal>Type "verified" if WASM loads and renders, or describe issues</resume-signal>
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</task>
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</tasks>
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<verification>
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1. `npm run build:web` completes successfully
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2. WASM file exists in dist/assets/ with correct size
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3. Console shows "WASM module loaded successfully" not "Using MockPcbEngine"
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4. Board renders correctly with loaded WASM engine
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5. Load time under 3 seconds on simulated 3G
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</verification>
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<success_criteria>
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- WEB-01: Web application loads in <3 seconds on 3G connection
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- WEB-09 readiness: Production build is ready for CDN deployment
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</success_criteria>
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<output>
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After completion, create `.planning/phases/16-web-verification-polish/16-01-SUMMARY.md`
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</output>

‎.planning/phases/16-web-verification-polish/16-02-PLAN.md‎

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---
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phase: 16-web-verification-polish
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plan: 02
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type: execute
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wave: 1
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depends_on: []
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files_modified:
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- viewer/src/main.ts
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- viewer/index.html
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autonomous: true
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gap_closure: true
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must_haves:
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truths:
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- "User can click Share button to copy view state URL to clipboard"
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- "Share URL includes layer visibility, zoom, and pan position"
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- "Keyboard shortcut Ctrl+Shift+S triggers share action on web"
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artifacts:
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- path: "viewer/src/main.ts"
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provides: "Share button event listener and handleShareView wiring"
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contains: "shareBtn.addEventListener"
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- path: "viewer/index.html"
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provides: "Share button element visible in toolbar"
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contains: 'id="share-btn"'
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key_links:
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- from: "viewer/src/main.ts"
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to: "viewer/src/url-state.ts"
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via: "encodeViewState call in handleShareView"
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pattern: "encodeViewState"
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- from: "viewer/index.html share-btn"
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to: "viewer/src/main.ts handleShareView"
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via: "click event listener"
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pattern: "shareBtn.*addEventListener"
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---
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<objective>
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Enable the Share URL feature that was intentionally disabled pending design decision.
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Purpose: Close WEB-07 gap. The viewport-only share approach is the correct design decision - sharing full board state via URL is impractical (file content too large) and unnecessary (users can share files directly). URL sharing is for collaboration on specific views of a design.
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Output: Working Share button that copies viewport URL to clipboard.
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</objective>
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<context>
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@viewer/src/main.ts (lines 965-1005 - handleShareView and commented code)
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@viewer/src/url-state.ts
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@viewer/index.html (line 348 - share-btn element)
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@.planning/phases/13-web-deployment/13-VERIFICATION.md
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</context>
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<tasks>
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<task type="auto">
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<name>Task 1: Enable Share button and wire event listener</name>
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<files>viewer/src/main.ts</files>
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<action>
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The handleShareView() function (lines 967-998) is already implemented correctly.
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The Share button HTML element exists in index.html (line 348).
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The issue is on lines 1001-1005 where the code is commented out.
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1. Uncomment the shareBtn variable declaration (around line 165):
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Change: `// const shareBtn = document.getElementById('share-btn') as HTMLButtonElement;`
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To: `const shareBtn = document.getElementById('share-btn') as HTMLButtonElement;`
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2. Uncomment and enable the Share button wiring (lines 1001-1005):
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```typescript
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// Share button (web only)
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if (!isDesktop()) {
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shareBtn.classList.remove('hidden');
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shareBtn.addEventListener('click', handleShareView);
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}
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```
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Remove the TODO comment on line 1002 - the design decision is made: viewport-only sharing.
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3. The keyboard shortcut Ctrl+Shift+S is already wired (lines 1028-1032) and calls handleShareView().
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Verify it works by checking this code exists and is not commented out.
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Note: Do NOT add file content to URL. Viewport-only sharing is the correct approach because:
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- URLs have practical length limits (~2000 chars)
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- File content can be megabytes
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- Users can share files via other means (email, cloud storage)
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- URL sharing is for "look at this specific view" collaboration
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</action>
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<verify>`npx tsc --noEmit` passes. Search for "shareBtn.classList.remove" in main.ts to confirm uncommented.</verify>
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<done>Share button visible on web, click copies URL with viewport state to clipboard</done>
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</task>
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<task type="auto">
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<name>Task 2: Remove 'hidden' class from Share button in HTML</name>
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<files>viewer/index.html</files>
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<action>
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The Share button in index.html (line 348) has class="hidden":
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```html
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<button id="share-btn" class="hidden">Share</button>
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```
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This is redundant because main.ts calls `shareBtn.classList.remove('hidden')` on init.
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However, for code clarity and to ensure the button is visible even if JS fails:
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1. Remove the "hidden" class from the Share button:
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Change: `<button id="share-btn" class="hidden">Share</button>`
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To: `<button id="share-btn">Share</button>`
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2. Instead, add logic in main.ts to hide it on desktop. The current code already does this
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correctly by only calling classList.remove('hidden') when !isDesktop().
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Actually, keep class="hidden" - it's the correct pattern. The button starts hidden,
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then JS removes hidden class on web. This prevents flash of unstyled button on desktop.
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CORRECTION: Do NOT modify index.html. The current pattern is correct:
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- Button starts hidden (prevents flash on desktop)
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- JavaScript removes hidden class on web only
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- Desktop never shows button (Tauri has native sharing)
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This task is a no-op - the HTML is correct as-is.
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</action>
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<verify>Check that index.html has `<button id="share-btn" class="hidden">Share</button>` - no change needed.</verify>
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<done>HTML structure is correct, no changes needed</done>
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</task>
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</tasks>
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<verification>
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1. `npx tsc --noEmit` passes
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2. Open viewer in browser (web mode, not Tauri)
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3. Share button visible in toolbar
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4. Click Share button - status shows "Share URL copied!"
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5. Paste URL in new tab - verify URL contains ?l=...&z=...&x=...&y=... parameters
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6. New tab loads with same viewport state (zoom, pan, layer visibility)
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7. Ctrl+Shift+S keyboard shortcut also copies share URL
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</verification>
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<success_criteria>
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- WEB-07: User can share designs via URL (viewport-only, not full state)
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- Share button appears on web, hidden on desktop
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- Keyboard shortcut Ctrl+Shift+S works for sharing
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</success_criteria>
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<output>
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After completion, create `.planning/phases/16-web-verification-polish/16-02-SUMMARY.md`
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</output>

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