Add Yahoo Finance stock data integration

- Add StockDataSource to fetch quotes from Yahoo Finance API
- Add StockSettingsStore for persisting user's stock symbols
- Add StockSettingsView with UI to manage symbols (max 5)
- Add STOCK feed item type and ranker weight (0.3)
- Integrate stock fetch into ContextOrchestrator pipeline
- Stock cards appear in FYI bucket and sync to Glass via BLE

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

IrisCompanion/iris/Views/StockSettingsView.swift

@@ -0,0 +1,104 @@
+//
+//  StockSettingsView.swift
+//  iris
+//
+
+import SwiftUI
+
+struct StockSettingsView: View {
+    @ObservedObject var store: StockSettingsStore
+    @State private var newSymbol: String = ""
+    @State private var showError: Bool = false
+    @State private var errorMessage: String = ""
+
+    var body: some View {
+        Form {
+            Section {
+                ForEach(store.symbols, id: \.self) { symbol in
+                    HStack {
+                        Text(symbol)
+                            .font(.body.monospaced())
+                        Spacer()
+                        Button(role: .destructive) {
+                            store.removeSymbol(symbol)
+                        } label: {
+                            Image(systemName: "trash")
+                                .foregroundStyle(.red)
+                        }
+                        .buttonStyle(.plain)
+                    }
+                }
+                .onDelete { indexSet in
+                    for index in indexSet {
+                        store.removeSymbol(store.symbols[index])
+                    }
+                }
+
+                if store.symbols.count < 5 {
+                    HStack {
+                        TextField("Symbol (e.g. AAPL)", text: $newSymbol)
+                            .textInputAutocapitalization(.characters)
+                            .autocorrectionDisabled()
+                            .font(.body.monospaced())
+                        Button("Add") {
+                            addSymbol()
+                        }
+                        .disabled(newSymbol.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty)
+                    }
+                }
+            } header: {
+                Text("Stock Symbols")
+            } footer: {
+                Text("Enter up to 5 stock symbols. Cards appear in the FYI section.")
+            }
+
+            Section {
+                VStack(alignment: .leading, spacing: 8) {
+                    Text("Examples:")
+                        .font(.subheadline.bold())
+                    Text("AAPL - Apple Inc.")
+                    Text("GOOGL - Alphabet Inc.")
+                    Text("^GSPC - S&P 500 Index")
+                    Text("^DJI - Dow Jones")
+                    Text("^IXIC - NASDAQ Composite")
+                }
+                .font(.caption)
+                .foregroundStyle(.secondary)
+            }
+        }
+        .navigationTitle("Stocks")
+        .alert("Error", isPresented: $showError) {
+            Button("OK") {}
+        } message: {
+            Text(errorMessage)
+        }
+    }
+
+    private func addSymbol() {
+        let cleaned = newSymbol.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
+        guard !cleaned.isEmpty else { return }
+
+        if store.symbols.contains(cleaned) {
+            errorMessage = "Symbol '\(cleaned)' already exists."
+            showError = true
+            return
+        }
+
+        if store.symbols.count >= 5 {
+            errorMessage = "Maximum of 5 symbols allowed."
+            showError = true
+            return
+        }
+
+        store.addSymbol(cleaned)
+        newSymbol = ""
+    }
+}
+
+struct StockSettingsView_Previews: PreviewProvider {
+    static var previews: some View {
+        NavigationStack {
+            StockSettingsView(store: StockSettingsStore())
+        }
+    }
+}