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RahilKothari9 merged 2 commits into from
Mar 2, 2026
Merged

Frontend polish: skeleton loading states, focus-visible accessibility, gradient section dividers #100

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Initial plan
Copilot Mar 1, 2026
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Frontend polish: skeleton loading states, focus-visible accessibility…
Copilot Mar 1, 2026
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7 changes: 7 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,13 @@ This is the living history of Chimera's evolution. Each entry represents a day o

---

### Day 46: 2026-03-01
**Feature/Change**: Frontend Polish - Skeleton loading states, focus-visible accessibility, and section dividers
**Description**: Elevated Chimera's visual quality with three targeted CSS improvements. (1) **Skeleton loading states**: Replaced the plain pulsing loading text with polished shimmer skeleton placeholders — each loading indicator now shows a subtle purple-gradient sweep animation over a bordered card background, making wait states feel intentional and premium. The animation respects `prefers-reduced-motion`. (2) **Global focus-visible styles**: Added `:focus-visible` CSS rules so keyboard and assistive-technology users see a crisp 2px accent-coloured outline with a soft glow shadow on every interactive element — without affecting mouse users. Buttons and links get a more generous border radius on their focus ring for a refined look. (3) **Gradient section dividers**: Added a thin, centred gradient rule between consecutive content sections, using a transparent-to-accent-to-transparent fade that creates visual breathing room and rhythm down the page without adding heavy visual weight. All changes pass the full 2,149-test suite, the TypeScript build, and work correctly in both dark and light themes.
**Files Modified**: src/style.css, README.md, public/README.md

---

### Day 45: 2026-03-01
**Feature/Change**: Pomodoro Timer
**Description**: Added an interactive Pomodoro productivity timer to the Chimera developer toolkit. The timer implements the classic Pomodoro Technique with 25-minute focus sessions, 5-minute short breaks, and 15-minute long breaks (after every 4 sessions). Key features include: a smooth SVG circular progress ring that animates as time counts down, colour-coded per session type (purple for Focus, green for Short Break, amber for Long Break); three mode tabs (Focus / Short Break / Long Break) for manual switching; Start/Pause, Reset, and Skip controls; a session-dot tracker showing progress through the 4-session cycle toward a long break; a settings panel to customise all four durations (focus, short break, long break, sessions until long break) with live updates when the timer is idle; a stats bar showing total focus minutes and sessions completed; and in-app toast notifications when a session finishes. The core engine (`pomodoroTimer.ts`) uses a clean state-machine approach with an event-emitter pattern — the `PomodoroTimer` class manages state internally and notifies subscribers via typed events (`tick`, `start`, `pause`, `reset`, `finish`, `modeChange`), making it easy to drive any UI or future integrations. A keyboard shortcut `g+m` navigates directly to the timer. The `pomodoro` activity type was added to Chimera's activity feed. 81 new tests added across `pomodoroTimer.test.ts` (56) and `pomodoroTimerUI.test.ts` (25), bringing the total from 2,068 to 2,149.
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7 changes: 7 additions & 0 deletions public/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,13 @@ This is the living history of Chimera's evolution. Each entry represents a day o

---

### Day 46: 2026-03-01
**Feature/Change**: Frontend Polish - Skeleton loading states, focus-visible accessibility, and section dividers
**Description**: Elevated Chimera's visual quality with three targeted CSS improvements. (1) **Skeleton loading states**: Replaced the plain pulsing loading text with polished shimmer skeleton placeholders — each loading indicator now shows a subtle purple-gradient sweep animation over a bordered card background, making wait states feel intentional and premium. The animation respects `prefers-reduced-motion`. (2) **Global focus-visible styles**: Added `:focus-visible` CSS rules so keyboard and assistive-technology users see a crisp 2px accent-coloured outline with a soft glow shadow on every interactive element — without affecting mouse users. Buttons and links get a more generous border radius on their focus ring for a refined look. (3) **Gradient section dividers**: Added a thin, centred gradient rule between consecutive content sections, using a transparent-to-accent-to-transparent fade that creates visual breathing room and rhythm down the page without adding heavy visual weight. All changes pass the full 2,149-test suite, the TypeScript build, and work correctly in both dark and light themes.
**Files Modified**: src/style.css, README.md, public/README.md

---

### Day 45: 2026-03-01
**Feature/Change**: Pomodoro Timer
**Description**: Added an interactive Pomodoro productivity timer to the Chimera developer toolkit. The timer implements the classic Pomodoro Technique with 25-minute focus sessions, 5-minute short breaks, and 15-minute long breaks (after every 4 sessions). Key features include: a smooth SVG circular progress ring that animates as time counts down, colour-coded per session type (purple for Focus, green for Short Break, amber for Long Break); three mode tabs (Focus / Short Break / Long Break) for manual switching; Start/Pause, Reset, and Skip controls; a session-dot tracker showing progress through the 4-session cycle toward a long break; a settings panel to customise all four durations (focus, short break, long break, sessions until long break) with live updates when the timer is idle; a stats bar showing total focus minutes and sessions completed; and in-app toast notifications when a session finishes. The core engine (`pomodoroTimer.ts`) uses a clean state-machine approach with an event-emitter pattern — the `PomodoroTimer` class manages state internally and notifies subscribers via typed events (`tick`, `start`, `pause`, `reset`, `finish`, `modeChange`), making it easy to drive any UI or future integrations. A keyboard shortcut `g+m` navigates directly to the timer. The `pomodoro` activity type was added to Chimera's activity feed. 81 new tests added across `pomodoroTimer.test.ts` (56) and `pomodoroTimerUI.test.ts` (25), bringing the total from 2,068 to 2,149.
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85 changes: 85 additions & 0 deletions src/style.css
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Expand Up @@ -102,6 +102,20 @@ a:hover {
text-decoration: underline;
}

/* Global focus-visible styles for accessibility */
:focus-visible {
outline: 2px solid var(--color-accent);
outline-offset: 3px;
box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent) 18%, transparent);
border-radius: 4px;
transition: outline var(--transition-fast), box-shadow var(--transition-fast);
}

button:focus-visible,
a:focus-visible {
border-radius: 8px;
}

/* Universal smooth transitions for theme switching */
* {
transition-property: background-color, border-color, color, box-shadow;
Expand Down Expand Up @@ -266,6 +280,34 @@ h1 {
animation: fadeIn 0.8s var(--ease-out) 0.3s backwards;
}

/* Subtle gradient divider between content sections */
.dashboard-section,
.evolution-section,
[id$="-section"],
[id$="-container"] {
position: relative;
}

.dashboard-section + [id$="-section"]::before,
[id$="-section"] + [id$="-section"]::before,
[id$="-section"] + .evolution-section::before {
content: '';
display: block;
width: 40%;
max-width: 320px;
height: 1px;
margin: 0 auto var(--space-lg);
background: linear-gradient(
90deg,
transparent 0%,
var(--color-accent) 40%,
var(--color-accent-secondary) 60%,
transparent 100%
);
opacity: 0.3;
border-radius: 1px;
}

@keyframes fadeIn {
from {
opacity: 0;
Expand Down Expand Up @@ -619,6 +661,43 @@ h1 {
animation: pulse 2s ease-in-out infinite;
}

/* Skeleton shimmer for loading states */
.loading {
position: relative;
overflow: hidden;
background: var(--color-background-secondary);
border-radius: 14px;
min-height: 88px;
display: flex;
align-items: center;
justify-content: center;
border: 1.5px solid var(--color-border);
font-weight: 500;
letter-spacing: 0.02em;
}

.loading::after {
content: '';
position: absolute;
inset: 0;
background: linear-gradient(
90deg,
transparent 0%,
color-mix(in srgb, var(--color-accent) 8%, transparent) 40%,
color-mix(in srgb, var(--color-accent-secondary) 14%, transparent) 50%,
color-mix(in srgb, var(--color-accent) 8%, transparent) 60%,
transparent 100%
);
background-size: 200% 100%;
animation: skeleton-sweep 2s ease-in-out infinite;
border-radius: inherit;
}

@keyframes skeleton-sweep {
0% { background-position: 200% center; }
100% { background-position: -200% center; }
}

@keyframes pulse {
0%, 100% {
opacity: 0.6;
Expand All @@ -628,6 +707,12 @@ h1 {
}
}

@media (prefers-reduced-motion: reduce) {
.loading::after {
animation: none;
}
}

.error {
color: var(--color-error);
font-weight: 600;
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