fix(imeta): accept floating-point dimensions so image space is reserved pre-load

Primal-style clients emit "dim 317.0x498.0" in NIP-92 imeta tags. DimensionTag.parse
called Int.parseInt on each component, threw NumberFormatException, and returned
null. With dim==null and no cached aspect ratio, GifVideoView / UrlImageView built
the container without an aspectRatio modifier, so the inline image collapsed to
zero height and the post body looked empty until Coil delivered the bitmap.

Parse each component as Double then truncate to Int. Adds DimensionTagTest covering
integer, float, truncation, 0x0 and malformed inputs.

https://claude.ai/code/session_01W1crao6Hwip8k5ByoLxVrc

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip94FileMetadata/tags/DimensionTag.kt

@@ -56,8 +56,11 @@ class DimensionTag(
             if (parts.size != 2) return null
 
             return try {
-                val width = parts[0].toInt()
-                val height = parts[1].toInt()
+                // Some clients (e.g. Primal) emit floating-point dimensions like "317.0x498.0"
+                // in NIP-92 imeta tags. Parse as Double and truncate to keep those tags usable
+                // for pre-load layout reservation.
+                val width = parts[0].toDouble().toInt()
+                val height = parts[1].toDouble().toInt()
 
                 DimensionTag(width, height)
             } catch (e: Exception) {

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip94FileMetadata/tags/DimensionTagTest.kt

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.nip94FileMetadata.tags
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+
+class DimensionTagTest {
+    @Test
+    fun parsesIntegerDimensions() {
+        val tag = DimensionTag.parse("317x498")
+        assertNotNull(tag)
+        assertEquals(317, tag.width)
+        assertEquals(498, tag.height)
+    }
+
+    @Test
+    fun parsesFloatDimensionsFromPrimal() {
+        // Regression: kind:1 notes from Primal-style clients ship floating-point dims in
+        // their imeta tag (e.g. "dim 317.0x498.0"). Before this was tolerated the value
+        // parsed to null, the GIF/image container lost its aspectRatio modifier, and the
+        // post body collapsed to zero height until Coil delivered the bitmap.
+        val tag = DimensionTag.parse("317.0x498.0")
+        assertNotNull(tag)
+        assertEquals(317, tag.width)
+        assertEquals(498, tag.height)
+    }
+
+    @Test
+    fun truncatesNonIntegerFloats() {
+        val tag = DimensionTag.parse("317.9x498.4")
+        assertNotNull(tag)
+        assertEquals(317, tag.width)
+        assertEquals(498, tag.height)
+    }
+
+    @Test
+    fun rejectsZeroByZero() {
+        assertNull(DimensionTag.parse("0x0"))
+    }
+
+    @Test
+    fun rejectsMalformed() {
+        assertNull(DimensionTag.parse("not-a-dim"))
+        assertNull(DimensionTag.parse("317"))
+        assertNull(DimensionTag.parse("317x"))
+    }
+
+    @Test
+    fun aspectRatioMatchesPrimalGif() {
+        val tag = DimensionTag.parse("317.0x498.0")
+        assertNotNull(tag)
+        assertEquals(317f / 498f, tag.aspectRatio())
+    }
+}