Design a mobile Android app UI using Material Design 3 (M3).

App name: Daily Quotes

Purpose:
A simple, calm app that shows one inspirational quote at a time and allows the user to see the next quote by tapping a button.

Design goals:
- Minimal
- Clean
- Peaceful
- Easy to read
- Beginner-friendly
- Emotionally calming

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OVERALL STYLE
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- Material Design 3
- Light theme by default
- Soft neutral background
- Rounded surfaces
- Generous spacing
- Focus on typography
- No clutter

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TOP APP BAR
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- Centered title: "Daily Quotes"
- No back button
- No extra icons
- Simple and clean

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MAIN CONTENT AREA
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Centered vertically and horizontally.

QUOTE CARD:
- Rounded card with soft elevation
- Padding inside the card
- Large quote text in the center
- Quote text aligned center
- Use elegant, readable font
- Below quote text:
  - Author name (smaller text)
  - Prefixed with a dash (— Author)

Example:
“Believe you can and you’re halfway there.”
— Theodore Roosevelt

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ACTION BUTTON
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Button placed near the bottom (but not touching the edge):

- Text: "Next Quote"
- Filled button
- Rounded corners
- Primary color
- Easy to tap
- Calm, friendly appearance

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EMPTY / LOADING STATE
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If no quote is available:
- Show placeholder text:
  "Your quote will appear here"

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ACCESSIBILITY
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- High contrast text
- Large readable font size
- Clear button label
- Comfortable spacing

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NAVIGATION
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- Single screen only
- No bottom navigation
- No floating action button

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EMOTIONAL TONE
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The UI should feel:
- Calm
- Encouraging
- Peaceful
- Non-distracting

End goal:
A beautiful, simple Daily Quotes app UI that feels relaxing and easy to use, following Material Design 3 principles.

The Daily Quotes app already works with:
- Jetpack Compose
- Kotlin
- ViewModel
- Fake quote list
- "Next Quote" button

Now modify the logic to support:

DAILY QUOTE MODE

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GOAL
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- Show ONE quote per day
- The quote must stay the same all day
- Automatically change when the date changes
- No database
- No internet
- No SharedPreferences needed

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IMPLEMENTATION DETAILS
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1️⃣ In QuoteViewModel:

- Keep the existing list of QuoteUiModel
- Remove random or next-quote cycling logic

2️⃣ Create a function:

private fun getDailyQuote(): QuoteUiModel

3️⃣ Inside that function:

- Get current date using:
    LocalDate.now()

- Convert date to a number:
    val dayNumber = today.toEpochDay()

- Compute index:
    val index = (dayNumber % quotes.size).toInt()

- Return quotes[index]

4️⃣ On ViewModel init:
- Set currentQuote = getDailyQuote()

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BUTTON BEHAVIOR
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- "Next Quote" button should now:
    - Refresh using getDailyQuote()
    OR
    - Show a message:
      "Come back tomorrow for a new quote"

Keep implementation simple.

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OUTPUT EXPECTATION
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- App builds successfully
- Quote stays same on app restart
- Quote changes automatically next day
- No database used
- Clean ViewModel logic
- Beginner-friendly code

You are an expert Android developer.

The Daily Quotes app already has:
- Jetpack Compose
- ViewModel
- Daily quote logic
- Category chips
- Quote card
- "Next Quote" button

Now implement small polish features:

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FEATURE 1 – FAVORITE TOGGLE
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GOAL:
- Add favorite functionality
- Heart icon toggles favorite state

IMPLEMENTATION:

1️⃣ Update QuoteUiModel:
- Add: isFavorite: Boolean

2️⃣ In QuoteViewModel:
- Keep a MutableStateFlow<QuoteUiModel>
- Add function: toggleFavorite()

3️⃣ When heart icon clicked:
- Call ViewModel.toggleFavorite()
- UI updates automatically

4️⃣ Change icon:
- If isFavorite == true → filled heart
- Else → outlined heart

No database required.
Favorite resets when app restarts.

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FEATURE 2 – SHARE QUOTE
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GOAL:
- Share quote using Android share sheet

IMPLEMENTATION:

1️⃣ Add function in ViewModel:
- fun getShareText(): String

Return:
"Quote text" — Author

2️⃣ In composable:
- Use LocalContext
- Create Intent(Intent.ACTION_SEND)
- Put EXTRA_TEXT
- Set type = "text/plain"
- Use context.startActivity(Intent.createChooser(...))

3️⃣ Trigger on Share icon click

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FEATURE 3 – LIGHT/DARK THEME TOGGLE
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GOAL:
- Toggle between light and dark theme
- Switch using icon in TopAppBar

IMPLEMENTATION:

1️⃣ Create AppThemeViewModel
- MutableStateFlow<Boolean> isDarkMode

2️⃣ Provide theme state to app root
- In MainActivity
- Wrap content in:
  if (isDarkMode) DarkColorScheme else LightColorScheme

3️⃣ Add theme toggle icon in TopAppBar:
- Sun icon for light mode
- Moon icon for dark mode

4️⃣ Clicking icon:
- Toggle isDarkMode

No persistence required.
Theme resets on restart.

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ARCHITECTURE RULES
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- No logic inside composables
- Use ViewModels
- StateFlow + collectAsState()
- Clean separation of concerns

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OUTPUT EXPECTATION
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- App builds successfully
- Favorite icon toggles correctly
- Share sheet opens correctly
- Theme switches smoothly
- No crashes
- No Gradle changes