results(gate-b): Playwright BVT evidence — Select Photos click path verified

Local + remote tests pass. Fix deployed on ubuDual5060.

test-results/gate-b-2026-09-07-fix/RESULTS.md

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+# Gate B Fix — Select Photos Click Path
+
+## Problem
+"Select Photos" button dead-clicked on deployed host (https://192.168.1.202/ and https://100.64.0.9/).
+
+## Root Causes
+1. **Missing label/input association**: `<label>` had no `for=` attribute, `<input>` had no `id=`. Clicking the label did nothing.
+2. **Svelte 5 event directive mismatch**: All event handlers used Svelte 4 syntax (`on:change`, `on:click`, `on:input`) which does not work in Svelte 5 runes mode. Must use native DOM properties (`onchange`, `onclick`, `oninput`).
+
+## Fix Applied
+- Added `id="photo-file-input"` to file input, `for="photo-file-input"` to label
+- Converted all event directives to Svelte 5 syntax across entire `+page.svelte`:
+  - `on:change` → `onchange`
+  - `on:click` → `onclick`
+  - `on:input` → `oninput`
+- Added Playwright BVT suite confirming the click path works
+
+## Test Results
+
+### Local BVT (compiled build)
+- 4/4 passed
+- Tests verify: label association, file selection → mask step advance, button enabled, full flow with knobs
+
+### Remote BVT (deployed host https://100.64.0.9)
+- 4/4 passed
+- Same test suite runs against live deployed instance
+- Confirms Select Photos → file picker → photo loads → mask step
+
+### Evidence
+- Playwright HTML report: `test-results/gate-b-2026-09-07-fix/playwright-report/`
+- Test suite: `frontend/test/bvt/`
+- Test image: `frontend/test/bvt/test-slab.png` (100x60 PNG, green border + white interior)
+
+## Deployment
+- Branch: `gate-b`
+- Commit: `17b6e6c`
+- Pushed to: `origin/gate-b`
+- Redeployed on: ubuDual5060 (Tailscale 100.64.0.9, LAN 192.168.1.202)
+- Frontend container `deploy-frontend-1` rebuilt and started
+
+## Status
+- Select Photos button now opens file picker on deployed host
+- File selection processes images and advances to mask step
+- All event handlers (buttons, selects, ranges) use Svelte 5 syntax
+- **Gate B not green** — remaining product-state issues (TV-3/6/7/10) are separate