feat(config): add floating save button (FAB) for issue #266 (#400)

* docs: add floating save button design spec for issue #266

* docs: add implementation plan for floating save button

* feat(config): add floating save button (FAB) for issue #266
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sagit
2026-04-01 09:50:32 +08:00
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parent 841d43344a
commit 3c10727e08
3 changed files with 319 additions and 0 deletions
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# Floating Save Button Implementation Plan
> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
**Goal:** Add a floating save button (FAB) to the config page that appears when configuration changes are detected.
**Architecture:** Inline FAB implementation using framer-motion AnimatePresence for enter/exit animations. Fixed-position circular button with slide-up animation, reusing existing hasChanges state and handleSave function.
**Tech Stack:** React, framer-motion (v11.18.2), shadcn-bridge/heroui Button, Tailwind CSS
---
## File Structure
| File | Action | Purpose |
|------|--------|---------|
| `vite-frontend/src/pages/config.tsx` | Modify | Add FAB imports and component at page bottom |
---
### Task 1: Add framer-motion Imports
**Files:**
- Modify: `vite-frontend/src/pages/config.tsx:1-5`
- [ ] **Step 1: Add AnimatePresence and motion imports**
Add import statement after existing framer-motion imports (or at top if none exist).
Current imports at line 1-2:
```typescript
import { useState, useEffect, useRef } from "react";
import { useNavigate } from "react-router-dom";
```
Add new import after line 2:
```typescript
import { AnimatePresence, motion } from "framer-motion";
```
- [ ] **Step 2: Commit import addition**
```bash
git add vite-frontend/src/pages/config.tsx
git commit -m "feat(config): add framer-motion imports for FAB animation"
```
---
### Task 2: Add FAB Component
**Files:**
- Modify: `vite-frontend/src/pages/config.tsx:1220-1224` (end of component)
- [ ] **Step 1: Add FAB at end of component (before closing div)**
Locate the end of `ConfigPage` component (line ~1223, the closing `</div>` after all modals).
Insert FAB component before the closing `</div>`:
```tsx
{/* Floating Save Button (FAB) */}
<AnimatePresence>
{hasChanges && (
<motion.div
initial={{ y: 100, opacity: 0 }}
animate={{ y: 0, opacity: 1 }}
exit={{ y: 100, opacity: 0 }}
transition={{ type: "spring", damping: 20, stiffness: 300 }}
className="fixed bottom-6 right-6 z-50"
>
<Button
isIconOnly
color="primary"
size="lg"
className="w-12 h-12 rounded-full shadow-lg"
isLoading={saving}
onPress={handleSave}
>
{!saving && <SaveIcon className="w-5 h-5" />}
</Button>
</motion.div>
)}
</AnimatePresence>
</div>
);
}
```
- [ ] **Step 2: Run dev server to verify**
```bash
cd vite-frontend && npm run dev
```
Manual verification checklist:
- Open config page at http://localhost:3000/config
- Modify any config field
- Verify FAB appears with slide-up animation
- Click FAB to save
- Verify FAB disappears with slide-down animation after save
- Scroll page and verify FAB stays fixed in viewport corner
- Test on mobile viewport (resize browser or use dev tools)
- [ ] **Step 3: Commit FAB implementation**
```bash
git add vite-frontend/src/pages/config.tsx
git commit -m "feat(config): add floating save button (FAB) for issue #266"
```
---
## Verification Summary
| Requirement | Verification Method |
|-------------|---------------------|
| FAB hidden by default | Visual: no FAB on page load with no changes |
| FAB appears on change | Visual: modify field → FAB slides up |
| Fixed position | Visual: scroll page → FAB stays in corner |
| Slide-up animation | Visual: observe animation timing/bounce |
| Slide-down on save | Visual: click save → FAB slides down |
| Loading state | Visual: click save → spinner shown during save |
| Mobile compatibility | Visual: resize to mobile viewport → same behavior |
---
## Self-Review Checklist
- [x] Spec coverage: All requirements from design doc covered (imports + FAB component, animation params, button style, interaction behavior)
- [x] No placeholders: All code shown, no TBD/TODO
- [x] Type consistency: SaveIcon (line 45-59), handleSave (line 372-434), hasChanges (line 214), saving (line 213) all exist in config.tsx
@@ -0,0 +1,162 @@
# Floating Save Button Design
**Date:** 2026-04-01
**Issue:** https://github.com/Sagit-chu/flvx/issues/266
**Status:** Approved
## Overview
Add a Floating Action Button (FAB) to the config page (`vite-frontend/src/pages/config.tsx`) that appears when configuration changes are detected, allowing users to save without scrolling to the top.
## Requirements
From Issue #266:
1. **Default hidden**: FAB not visible when no config changes
2. **Show on change**: Auto-display when `hasChanges` becomes true
3. **Fixed position**: Suspended at bottom-right corner, does not scroll with page
4. **Mobile compatible**: Same behavior on desktop and mobile devices
## Design Decisions
### 1. Implementation Approach
**Inline FAB in config.tsx** (not a reusable component)
- Rationale: Current need is limited to config page only
- State management (`hasChanges`, `saving`) already exists in the page
- framer-motion patterns already established in project
- Avoids over-abstraction (YAGNI)
### 2. UI Structure
Position: `fixed bottom-6 right-6` (24px from viewport edges)
Visual layout:
```
┌──────────────────────────────────────┐
│ [页面内容,可滚动] │
│ │
│ [●] │ ← FAB (fixed position)
└──────────────────────────────────────┘
```
### 3. Button Appearance
- Shape: Circular (`w-12 h-12 rounded-full`)
- Color: Primary (matches existing save button)
- Icon: SaveIcon (already defined in config.tsx)
- Shadow: `shadow-lg` for visual hierarchy
- Style: Icon-only (no text label)
### 4. Animation
Using framer-motion with `AnimatePresence`:
| Phase | Properties |
|-------|------------|
| `initial` | `{ y: 100, opacity: 0 }` - starts below viewport |
| `animate` | `{ y: 0, opacity: 1 }` - slides up to position |
| `exit` | `{ y: 100, opacity: 0 }` - slides back down on hide |
Transition config:
```typescript
transition={{ type: "spring", damping: 20, stiffness: 300 }}
```
Spring parameters produce Material Design-like feel: smooth entrance, slight bounce settle.
### 5. Interaction Details
- **Click**: Calls existing `handleSave()` function
- **Loading state**: Button shows Spinner when `saving === true`
- **Hover**: Inherits Button component's primary color hover behavior
- **z-index**: `z-50` (above page content, below modals)
- **Prevent duplicate click**: Button disabled when `saving === true`
## Technical Implementation
### Code Location
File: `vite-frontend/src/pages/config.tsx`
### Required Imports
```typescript
import { AnimatePresence, motion } from "framer-motion";
```
### FAB Component Structure
```tsx
<AnimatePresence>
{hasChanges && (
<motion.div
initial={{ y: 100, opacity: 0 }}
animate={{ y: 0, opacity: 1 }}
exit={{ y: 100, opacity: 0 }}
transition={{ type: "spring", damping: 20, stiffness: 300 }}
className="fixed bottom-6 right-6 z-50"
>
<Button
isIconOnly
color="primary"
size="lg"
className="w-12 h-12 rounded-full shadow-lg"
isLoading={saving}
onPress={handleSave}
>
{!saving && <SaveIcon className="w-5 h-5" />}
</Button>
</motion.div>
)}
</AnimatePresence>
```
### Placement
Insert FAB at the end of the component, before the closing `</div>` (after all Cards and Modals).
### Dependencies
- framer-motion: Already installed (v11.18.2)
- Button: Already imported from `@/shadcn-bridge/heroui/button`
- SaveIcon: Already defined in config.tsx
## Behavior Matrix
| State | FAB Visibility | Button Enabled |
|-------|----------------|----------------|
| `hasChanges = false` | Hidden (not rendered) | N/A |
| `hasChanges = true, saving = false` | Visible, animating in | Yes |
| `hasChanges = true, saving = true` | Visible | No (loading) |
| Save success | Hidden (animating out) | N/A |
## Responsive Behavior
No special handling needed. `fixed bottom-6 right-6` works identically on:
- Desktop browsers
- Mobile browsers
- H5/WebView mode
The FAB maintains consistent 24px margin from viewport edges regardless of screen size.
## Edge Cases
1. **Multiple rapid toggles**: AnimatePresence handles gracefully - exit animation completes before new enter animation
2. **Page unload with unsaved changes**: Not addressed in this design (separate concern)
3. **FAB covers existing warning banner**: z-50 places FAB above the warning banner at line 1004-1013
## Testing Checklist
After implementation, verify:
- [ ] FAB appears when any config field is modified
- [ ] FAB slides up from bottom on appearance
- [ ] FAB slides down to bottom on disappearance
- [ ] FAB fixed position during page scroll
- [ ] FAB triggers save on click
- [ ] FAB shows spinner during save
- [ ] FAB disappears after successful save
- [ ] FAB works on mobile viewport
- [ ] FAB does not interfere with Modal dialogs
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@@ -1,5 +1,6 @@
import { useState, useEffect, useRef } from "react";
import { useNavigate } from "react-router-dom";
import { AnimatePresence, motion } from "framer-motion";
import toast from "react-hot-toast";
import { Button } from "@/shadcn-bridge/heroui/button";
@@ -1220,6 +1221,30 @@ export default function ConfigPage() {
)}
</ModalContent>
</Modal>
{/* Floating Save Button (FAB) */}
<AnimatePresence>
{hasChanges && (
<motion.div
initial={{ y: 100, opacity: 0 }}
animate={{ y: 0, opacity: 1 }}
exit={{ y: 100, opacity: 0 }}
transition={{ type: "spring", damping: 20, stiffness: 300 }}
className="fixed bottom-6 right-6 z-50"
>
<Button
isIconOnly
color="primary"
size="lg"
className="w-12 h-12 rounded-full shadow-lg"
isLoading={saving}
onPress={handleSave}
>
{!saving && <SaveIcon className="w-5 h-5" />}
</Button>
</motion.div>
)}
</AnimatePresence>
</div>
);
}