feat: hero card layout in all pills, cache-while-loading, logo splash screen

- Every pill (F1, Tech, AI, Cloud, HomeLab…) now shows the same hero card
  layout as "All" — first story is the big featured card, rest follow as rows
- "All" retains its full multi-section front page (US / Tech / AI / Sport…)
- Topic pill headers use the pill name instead of "TOP STORIES"
- filteredStories now falls back to cached SwiftData rows while loading, so
  switching to F1 or Tech shows cached cards instantly instead of a blank list
- Logo splash screen (3 pill bars + jarvis wordmark) shows on launch and fades
  out after setup completes; minimum 1.3 s so it's always readable
- JarvisWordmark moved to Theme.swift so SplashView and feed can share it

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Jarvis/Views/Home/SignalFeedView.swift

@@ -5,21 +5,6 @@
 import SwiftUI
 import SwiftData
 
-// Reusable wordmark: typewriter font, lowercase j in orange, orange dot on i.
-struct JarvisWordmark: View {
-    var size: CGFloat = 30
-
-    private var font: Font { .custom("Courier New", size: size).bold() }
-
-    var body: some View {
-        HStack(spacing: 0) {
-            Text("j").font(font).foregroundStyle(Palette.orange)
-            Text("arv").font(font).foregroundStyle(.white)
-            Text("is").font(font).foregroundStyle(.white)
-        }
-    }
-}
-
 struct SignalFeedView: View {
     @EnvironmentObject var store: StoryStore
     @EnvironmentObject var ws: WebSocketManager
@@ -46,16 +31,14 @@ struct SignalFeedView: View {
     private var readStoryIds: Set<String> { Set(readStories.map(\.id)) }
     private var savedStoryIds: Set<String> { Set(savedStories.map(\.id)) }
 
-    /// Live stories when online; cached fallback when offline. Filtered by the
-    /// selected pill via backend tags — no headline keyword matching.
+    /// Live stories when connected; cached fallback while loading or offline so
+    /// switching to Tech / AI / F1 shows cached cards instantly.
     private var filteredStories: [StorySummary] {
         let base: [StorySummary]
         if !store.stories.isEmpty {
             base = store.stories.sorted(by: StorySummary.feedOrder)
-        } else if !ws.connectionState.isLive {
-            base = cachedStories.map(StorySummary.init(cached:)).sorted(by: StorySummary.feedOrder)
         } else {
-            base = []
+            base = cachedStories.map(StorySummary.init(cached:)).sorted(by: StorySummary.feedOrder)
         }
         return base.filter { $0.matches(selectedPill) }
     }
@@ -73,8 +56,8 @@ struct SignalFeedView: View {
         filteredStories.filter { readStoryIds.contains($0.id) }
     }
 
-    /// "All" shows a sectioned front page; specific pills show a flat list.
-    private var isDigest: Bool { selectedPill == .all }
+    /// Every pill shows the card layout — sections are scoped to "All".
+    private var isDigest: Bool { true }
 
     /// Front-page digest: Top Stories + up to 3 per category section, deduped.
     private var digest: (top: [StorySummary], sections: [(NewsSection, [StorySummary])]) {
@@ -125,7 +108,6 @@ struct SignalFeedView: View {
                     header
                     syncBar
                     topicPills
-                    if !isDigest { columnHeaders }   // sections carry their own headers
                     Divider().overlay(Palette.hairline)
                     feedList
                 }
@@ -260,13 +242,7 @@ struct SignalFeedView: View {
 
     private var feedList: some View {
         List {
-            if mainStories.isEmpty && readItems.isEmpty {
-                emptyState.plainBlackRow()
-            } else if isDigest {
-                digestContent
-            } else {
-                flatContent
-            }
+            digestContent
         }
         .listStyle(.plain)
         .scrollContentBackground(.hidden)
@@ -283,28 +259,25 @@ struct SignalFeedView: View {
         }
     }
 
-    /// Flat list for a specific pill.
-    @ViewBuilder private var flatContent: some View {
-        ForEach(mainStories) { mainRow($0) }
-        if mainStories.isEmpty { caughtUpRow.plainBlackRow() }
-        if store.isLoadingMore {
-            ProgressView().tint(Palette.orange)
-                .frame(maxWidth: .infinity).padding(.vertical, 20).plainBlackRow()
-        }
-        readShelf
-    }
-
-    /// Sectioned front page for "All".
+    /// Card layout for every pill. "All" gets full multi-section front page;
+    /// topic pills get a hero card + flat list within that topic.
     @ViewBuilder private var digestContent: some View {
         let d = digest
-        sectionHeader("TOP STORIES", pill: nil)
+        let headerLabel = selectedPill == .all
+            ? "TOP STORIES"
+            : selectedPill.label.uppercased()
+        sectionHeader(headerLabel, pill: nil)
         if let lead = d.top.first {
             mainRow(lead, hero: true)
             ForEach(d.top.dropFirst()) { mainRow($0) }
+        } else {
+            emptyState.plainBlackRow()
         }
-        ForEach(d.sections, id: \.0.id) { section, stories in
-            sectionHeader(section.label.uppercased(), pill: section.pill)
-            ForEach(stories) { mainRow($0) }
+        if selectedPill == .all {
+            ForEach(d.sections, id: \.0.id) { section, stories in
+                sectionHeader(section.label.uppercased(), pill: section.pill)
+                ForEach(stories) { mainRow($0) }
+            }
         }
         readShelf
     }

Jarvis/Views/Shared/Theme.swift

@@ -264,6 +264,19 @@ extension StorySummary {
     }
 }
 
+// MARK: - Wordmark
+
+struct JarvisWordmark: View {
+    var size: CGFloat = 30
+    private var font: Font { .custom("Courier New", size: size).bold() }
+    var body: some View {
+        HStack(spacing: 0) {
+            Text("j").font(font).foregroundStyle(Palette.orange)
+            Text("arvis").font(font).foregroundStyle(.white)
+        }
+    }
+}
+
 // MARK: - News sections (the "All" front page)
 //
 // Groups the firehose into Apple/Google-News-style sections. A story lands in