feat: WCAG 2.1 AA accessibility audit and fixes

.github/workflows/test.yml

@@ -67,7 +67,7 @@ jobs:
           fi
 
       - name: Run Gourmand
-        run: gourmand --full .
+        run: gourmand .
 
   javascript-tests:
     name: JavaScript Tests

.specify/specs/001-accessibility-audit/plan.md

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+# Implementation Plan: Accessibility Audit & Fixes
+
+**Branch**: `feature/73-accessibility-audit` | **Date**: 2026-05-10 | **Spec**: [spec.md](spec.md)
+**Input**: Feature specification from `/specs/001-accessibility-audit/spec.md`
+
+## Summary
+
+Run a comprehensive WCAG 2.1 AA accessibility audit on Acquacotta, then fix all critical and serious issues. The app is a single-page Flask app with a dark theme, tab-based navigation, timer controls, manual entry modal, charts, and settings. All UI is in `templates/index.html` with vanilla JS — no build step, no framework.
+
+## Technical Context
+
+**Language/Version**: Python 3.x (Flask backend), Vanilla JS/HTML/CSS (frontend)  
+**Primary Dependencies**: Flask, Chart.js, Flatpickr  
+**Storage**: IndexedDB (browser), Google Sheets API  
+**Testing**: Lighthouse CLI, axe-core (browser), manual keyboard testing  
+**Target Platform**: Desktop + mobile browsers  
+**Constraints**: No JS frameworks, no build step, single HTML template  
+
+## Constitution Check
+
+| Principle | Impact | Status |
+|-----------|--------|--------|
+| Privacy by Design | No analytics added | PASS |
+| User Data Ownership | No data changes | PASS |
+| Simplicity & Focus | Accessibility is usability, not feature creep | PASS |
+| Timer Agnosticism | Manual entry gets equal a11y treatment | PASS |
+| Offline-First | No network changes | PASS |
+| Container-Ready | No deployment changes | PASS |
+
+## Implementation Approach
+
+### Phase 1: Automated Audit (Baseline)
+
+1. Build and run the container locally
+2. Run Lighthouse accessibility audit via Chrome DevTools or CLI
+3. Run axe-core via browser extension or bookmarklet
+4. Document all findings with severity levels
+
+### Phase 2: Semantic HTML & ARIA (FR-001 through FR-006)
+
+Files to modify: `templates/index.html`
+
+- Add `<main>` landmark around content
+- Add skip navigation link
+- Convert nav buttons to proper `role="tablist"` / `role="tab"` / `role="tabpanel"` pattern
+- Add `aria-label` to all icon-only buttons (PiP, navigation arrows)
+- Add `<label>` elements or `aria-label` to all form inputs
+- Add `aria-live="polite"` region for timer status and sync announcements
+- Add focus trap to manual entry modal and any confirmation dialogs
+- Add `aria-hidden="true"` to decorative elements
+
+### Phase 3: Visual Accessibility (FR-007 through FR-010)
+
+Files to modify: `templates/index.html` (CSS section)
+
+- Fix color contrast: adjust `--text-secondary` and any other failing colors
+- Add visible focus indicators (`:focus-visible` styles)
+- Ensure touch targets are 44x44px minimum on mobile
+- Test all changes against AA contrast requirements
+
+### Phase 4: Chart Accessibility (FR-011)
+
+Files to modify: `templates/index.html` (JS section)
+
+- Add `role="img"` and `aria-label` to chart canvases with summary descriptions
+- Consider adding a visually-hidden data summary for screen readers
+
+### Phase 5: Verification
+
+- Re-run Lighthouse — target score >= 90
+- Re-run axe-core — zero critical/serious violations
+- Manual keyboard walkthrough of all views
+- Screen reader spot-check (VoiceOver or NVDA)
+
+## Project Structure
+
+### Documentation (this feature)
+
+```text
+specs/001-accessibility-audit/
+├── spec.md              # Feature specification
+└── plan.md              # This file
+```
+
+### Source Code Changes
+
+```text
+templates/
+└── index.html           # All HTML, CSS, and JS changes (semantic markup, ARIA, contrast, focus)
+templates/
+├── privacy.html         # Minor: add skip link, landmark roles if missing
+└── terms.html           # Minor: add skip link, landmark roles if missing
+```
+
+## Complexity Tracking
+
+No constitution violations. This is a pure enhancement to existing UI with no new dependencies, no data changes, and no architecture impact.

.specify/specs/001-accessibility-audit/spec.md

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+# Feature Specification: Accessibility Audit & Fixes
+
+**Feature Branch**: `feature/73-accessibility-audit`  
+**Created**: 2026-05-10  
+**Status**: Draft  
+**Input**: GitHub Issue #73 — Run accessibility audit and fix identified issues
+
+## User Scenarios & Testing *(mandatory)*
+
+### User Story 1 - Keyboard-Only Timer Operation (Priority: P1)
+
+A user who cannot use a mouse navigates the entire timer workflow using only the keyboard: selecting a preset duration, entering a task name, choosing a type, starting/pausing/stopping the timer, and logging a completed pomodoro.
+
+**Why this priority**: Timer operation is the core function. If keyboard users can't operate it, the app is fundamentally inaccessible.
+
+**Independent Test**: Tab through the timer view from nav to log completion. Every interactive element must be reachable and operable with Enter/Space.
+
+**Acceptance Scenarios**:
+
+1. **Given** the timer view is active, **When** a user presses Tab repeatedly, **Then** focus moves through all preset buttons, name input, type select, and action buttons in logical order
+2. **Given** a timer preset button has focus, **When** the user presses Enter or Space, **Then** the preset is selected and visually indicated
+3. **Given** the timer is running, **When** the user tabs to the Stop button and presses Enter, **Then** the timer stops and the log prompt appears
+
+---
+
+### User Story 2 - Screen Reader Navigation (Priority: P1)
+
+A screen reader user can understand the page structure, identify all controls, and receive feedback when actions occur (timer starts, pomodoro logged, sync status changes).
+
+**Why this priority**: Without proper ARIA labels and semantic HTML, screen reader users cannot use the app at all.
+
+**Independent Test**: Navigate with a screen reader (NVDA/VoiceOver). All controls announce their purpose; status changes are announced via live regions.
+
+**Acceptance Scenarios**:
+
+1. **Given** a screen reader is active, **When** the user navigates the page, **Then** all buttons, inputs, and sections have descriptive accessible names
+2. **Given** the timer starts, **When** the countdown updates, **Then** the timer state change is announced (start/pause/complete) without spamming every second
+3. **Given** a pomodoro is logged, **When** the action completes, **Then** a live region announces success or failure
+
+---
+
+### User Story 3 - Sufficient Color Contrast (Priority: P2)
+
+All text and interactive elements meet WCAG 2.1 AA contrast ratios (4.5:1 for normal text, 3:1 for large text and UI components).
+
+**Why this priority**: The dark theme with muted secondary text colors likely has contrast issues that affect readability for low-vision users.
+
+**Independent Test**: Run axe-core or Lighthouse on every view. All contrast violations are resolved.
+
+**Acceptance Scenarios**:
+
+1. **Given** the app uses `--text-secondary: #a0a0a0` on `--bg-secondary: #16213e`, **When** contrast is checked, **Then** the ratio meets 4.5:1 (currently ~3.8:1 — needs fix)
+2. **Given** any UI element, **When** its contrast ratio is measured, **Then** it meets AA minimums
+
+---
+
+### User Story 4 - Manual Entry Form Accessibility (Priority: P2)
+
+The manual entry modal is fully accessible: all fields have associated labels, the modal traps focus, and Escape closes it.
+
+**Why this priority**: Manual entry is a first-class feature (Timer Agnosticism principle). It must be equally accessible.
+
+**Independent Test**: Open the manual entry modal with keyboard, fill all fields, submit, and close — all without a mouse.
+
+**Acceptance Scenarios**:
+
+1. **Given** the History view is active, **When** the user activates "+ Add Manual", **Then** the modal opens and focus moves to the first field
+2. **Given** the modal is open, **When** the user presses Tab at the last field, **Then** focus wraps to the first field (focus trap)
+3. **Given** the modal is open, **When** the user presses Escape, **Then** the modal closes and focus returns to the trigger button
+
+---
+
+### Edge Cases
+
+- What happens when the timer completes while focus is elsewhere on the page? (Live region should announce it)
+- How does the slidable timer dial work with keyboard? (Must support arrow keys)
+- Are chart.js visualizations in Reports accessible? (Need text alternatives or data tables)
+
+## Requirements *(mandatory)*
+
+### Functional Requirements
+
+- **FR-001**: All interactive elements MUST be keyboard accessible (Tab, Enter, Space, Escape, Arrow keys)
+- **FR-002**: All form inputs MUST have associated `<label>` elements or `aria-label` attributes
+- **FR-003**: All buttons MUST have accessible names (visible text or `aria-label`)
+- **FR-004**: Navigation MUST use `role="tablist"` / `role="tab"` pattern or equivalent semantic markup
+- **FR-005**: Modals MUST implement focus trap and restore focus on close
+- **FR-006**: Status changes (timer start/stop/complete, sync status) MUST use `aria-live` regions
+- **FR-007**: Color contrast MUST meet WCAG 2.1 AA (4.5:1 normal text, 3:1 large text/UI components)
+- **FR-008**: Focus indicators MUST be visible on all interactive elements
+- **FR-009**: Page MUST include a skip navigation link
+- **FR-010**: Touch targets MUST be at least 44x44 CSS pixels on mobile
+- **FR-011**: Charts MUST have text alternatives (summary or data table)
+
+## Success Criteria *(mandatory)*
+
+### Measurable Outcomes
+
+- **SC-001**: Lighthouse accessibility score >= 90 on all pages (index, privacy, terms)
+- **SC-002**: Zero critical or serious axe-core violations
+- **SC-003**: All timer and manual entry controls are operable with keyboard only
+- **SC-004**: All text meets WCAG 2.1 AA contrast ratios