perf: fix choppy home screen scrolling on mobile

- Remove per-card MutableInteractionSource + collectIsPressedAsState
  subscription from NoteCard — every visible card was holding an active
  state subscription during scroll, causing constant recomposition pressure
- Remove spring animateFloatAsState scale animation from each NoteCard;
  Card native pressedElevation=4dp still provides tactile press feedback
- Remove unused imports from HomeScreen (AnimatedVisibility, SwipeToDismiss,
  background, Color, duplicate Surface/Text declarations)

Author: editinghero

app/src/main/java/com/astralquarks/notes/ui/components/NoteCard.kt

@@ -1,9 +1,5 @@
 package com.astralquarks.notes.ui.components
 
-import androidx.compose.animation.core.animateFloatAsState
-import androidx.compose.animation.core.spring
-import androidx.compose.foundation.interaction.MutableInteractionSource
-import androidx.compose.foundation.interaction.collectIsPressedAsState
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.background
 import androidx.compose.foundation.isSystemInDarkTheme
@@ -45,18 +41,16 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.clipToBounds
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.graphics.luminance
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.ui.draw.clipToBounds
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextDecoration
@@ -142,21 +136,9 @@ fun NoteCard(
         }
     }
 
-    val interactionSource = remember { MutableInteractionSource() }
-    val isPressed by interactionSource.collectIsPressedAsState()
-    val scale by animateFloatAsState(
-        targetValue = if (isPressed) 0.95f else 1f,
-        animationSpec = spring(dampingRatio = 0.6f, stiffness = 300f),
-        label = "card_scale"
-    )
-
     Card(
         onClick = onClick,
-        interactionSource = interactionSource,
-        modifier = modifier.fillMaxWidth().testTag("note_card_${note.id}").graphicsLayer {
-            scaleX = scale
-            scaleY = scale
-        },
+        modifier = modifier.fillMaxWidth().testTag("note_card_${note.id}"),
         shape = RoundedCornerShape(32.dp),
         colors = CardDefaults.cardColors(containerColor = cardBg),
         border = BorderStroke(
@@ -165,7 +147,6 @@ fun NoteCard(
             else MaterialTheme.colorScheme.outlineVariant.copy(alpha = 0.4f)
         ),
         elevation = CardDefaults.cardElevation(defaultElevation = 1.dp, pressedElevation = 4.dp)
-
     ) {
         Column(modifier = Modifier.fillMaxWidth()) {
             // Optional image header

app/src/main/java/com/astralquarks/notes/ui/screens/HomeScreen.kt

@@ -1,15 +1,11 @@
 package com.astralquarks.notes.ui.screens
 
-import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.animation.fadeIn
-import androidx.compose.animation.fadeOut
 import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.animation.core.spring
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.interaction.collectIsPressedAsState
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.foundation.ExperimentalFoundationApi
-import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.Arrangement
@@ -63,18 +59,12 @@ import androidx.compose.material.icons.filled.Code
 import androidx.compose.material.icons.filled.Edit
 import androidx.compose.material.icons.filled.TextFields
 import androidx.compose.material3.ModalBottomSheet
-import androidx.compose.material3.rememberModalBottomSheetState
 import com.astralquarks.notes.ui.components.ImageUrlDialog
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Surface
-import androidx.compose.material3.SwipeToDismissBox
-import androidx.compose.material3.SwipeToDismissBoxValue
-import androidx.compose.material3.Text
-import androidx.compose.material3.rememberSwipeToDismissBoxState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -83,7 +73,6 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.text.font.FontWeight