diff --git a/src/analytics/projections.zig b/src/analytics/projections.zig
index 519b94d..a708e52 100644
--- a/src/analytics/projections.zig
+++ b/src/analytics/projections.zig
@@ -44,7 +44,7 @@ pub const ResolvedEvent = struct {
 /// Social Security). Negative = expense (increases withdrawal, e.g.
 /// college tuition).
 pub const LifeEvent = struct {
-    name: [max_name_len]u8 = .{0} ** max_name_len,
+    name: [max_name_len]u8 = @splat(0),
     name_len: u8 = 0,
     start_age: u16,
     person: u8 = 0, // 0-indexed into birthdates array
@@ -112,19 +112,19 @@ pub const UserConfig = struct {
     /// Target stock allocation percentage (0-100). Used for simulation blending.
     target_stock_pct: ?f64 = null,
     /// Retirement horizons to simulate (years). Defaults to 20,30,45.
-    horizons: [max_horizons]u16 = .{ 20, 30, 45 } ++ .{0} ** (max_horizons - 3),
+    horizons: [max_horizons]u16 = .{ 20, 30, 45 } ++ @as([max_horizons - 3]u16, @splat(0)),
     horizon_count: u8 = 3,
     /// Age-based horizon targets. Resolved at context-load time to
     /// `target_age − max(currentAges())` years — i.e. how long until the
     /// oldest configured person hits `target_age`. Rationale: the first
     /// person to hit the target age sets the meaningful planning horizon,
     /// because spending typically drops substantially after the first death.
-    horizon_ages: [max_horizons]u16 = .{0} ** max_horizons,
+    horizon_ages: [max_horizons]u16 = @splat(0),
     horizon_age_count: u8 = 0,
     /// Confidence levels for safe withdrawal. Always 90/95/99.
     confidence_levels: [3]f64 = .{ 0.90, 0.95, 0.99 },
     /// Birthdates for age-based event timing.
-    birthdates: [max_persons]Date = .{Date.fromYmd(1970, 1, 1)} ** max_persons,
+    birthdates: [max_persons]Date = @splat(Date.fromYmd(1970, 1, 1)),
     birthdate_count: u8 = 0,
     /// Life events (income/expenses) that modify annual cash flow.
     events: [max_events]LifeEvent = undefined,
@@ -160,7 +160,7 @@ pub const UserConfig = struct {
 
     /// Compute ages as of a specific date (for testing).
     pub fn currentAgesAsOf(self: *const UserConfig, as_of: Date) [max_persons]u16 {
-        var ages: [max_persons]u16 = .{0} ** max_persons;
+        var ages: [max_persons]u16 = @splat(0);
         for (0..self.birthdate_count) |i| {
             const years = Date.yearsBetween(self.birthdates[i], as_of);
             ages[i] = if (years > 0) @intFromFloat(years) else 0;
diff --git a/src/commands/portfolio.zig b/src/commands/portfolio.zig
index dddb3dc..fb40627 100644
--- a/src/commands/portfolio.zig
+++ b/src/commands/portfolio.zig
@@ -228,7 +228,7 @@ pub fn display(
             const sign: []const u8 = if (a.unrealized_gain_loss >= 0) "+" else "-";
 
             // Date + ST/LT for single-lot positions
-            var date_col: [24]u8 = .{' '} ** 24;
+            var date_col: [24]u8 = @splat(' ');
             var date_col_len: usize = 0;
             if (!is_multi and lots_for_sym.items.len == 1) {
                 const lot = lots_for_sym.items[0];
diff --git a/src/format.zig b/src/format.zig
index 3f4486b..4225345 100644
--- a/src/format.zig
+++ b/src/format.zig
@@ -255,7 +255,7 @@ pub fn fmtTimeAgo(buf: []u8, timestamp: i64) []const u8 {
 
 /// Format large numbers with T/B/M suffixes (e.g. "1.5B", "45.6M").
 pub fn fmtLargeNum(val: f64) [15]u8 {
-    var result: [15]u8 = .{' '} ** 15;
+    var result: [15]u8 = @splat(' ');
     if (val >= 1_000_000_000_000) {
         _ = std.fmt.bufPrint(&result, "{d:.1}T", .{val / 1_000_000_000_000}) catch {};
     } else if (val >= 1_000_000_000) {
diff --git a/src/tui.zig b/src/tui.zig
index 01fa9c5..07a228a 100644
--- a/src/tui.zig
+++ b/src/tui.zig
@@ -334,14 +334,14 @@ pub const App = struct {
 
     // Portfolio navigation
     cursor: usize = 0, // selected row in portfolio view
-    expanded: [64]bool = [_]bool{false} ** 64, // which positions are expanded
+    expanded: [64]bool = @splat(false), // which positions are expanded
     cash_expanded: bool = false, // whether cash section is expanded to show per-account
     illiquid_expanded: bool = false, // whether illiquid section is expanded to show per-asset
     portfolio_rows: std.ArrayList(PortfolioRow) = .empty,
     prepared_options: ?views.Options = null,
     prepared_cds: ?views.CDs = null,
     portfolio_header_lines: usize = 0, // number of styled lines before data rows
-    portfolio_line_to_row: [256]usize = [_]usize{0} ** 256, // maps styled line index -> portfolio_rows index
+    portfolio_line_to_row: [256]usize = @splat(0), // maps styled line index -> portfolio_rows index
     portfolio_line_count: usize = 0, // total styled lines in portfolio view
     portfolio_sort_field: PortfolioSortField = .symbol, // current sort column
     portfolio_sort_dir: SortDirection = .asc, // current sort direction
@@ -362,9 +362,9 @@ pub const App = struct {
 
     // Options navigation (inline expand/collapse like portfolio)
     options_cursor: usize = 0, // selected row in flattened options view
-    options_expanded: [64]bool = [_]bool{false} ** 64, // which expirations are expanded
-    options_calls_collapsed: [64]bool = [_]bool{false} ** 64, // per-expiration: calls section collapsed
-    options_puts_collapsed: [64]bool = [_]bool{false} ** 64, // per-expiration: puts section collapsed
+    options_expanded: [64]bool = @splat(false), // which expirations are expanded
+    options_calls_collapsed: [64]bool = @splat(false), // per-expiration: calls section collapsed
+    options_puts_collapsed: [64]bool = @splat(false), // per-expiration: puts section collapsed
     options_near_the_money: usize = 8, // +/- strikes from ATM
     options_rows: std.ArrayList(OptionsRow) = .empty,
     options_header_lines: usize = 0, // number of styled lines before data rows
@@ -1621,9 +1621,9 @@ pub const App = struct {
         self.options_loaded = false;
         self.etf_loaded = false;
         self.options_cursor = 0;
-        self.options_expanded = [_]bool{false} ** 64;
-        self.options_calls_collapsed = [_]bool{false} ** 64;
-        self.options_puts_collapsed = [_]bool{false} ** 64;
+        self.options_expanded = @splat(false);
+        self.options_calls_collapsed = @splat(false);
+        self.options_puts_collapsed = @splat(false);
         self.options_rows.clearRetainingCapacity();
         self.candle_timestamp = 0;
         self.options_timestamp = 0;
diff --git a/src/tui/options_tab.zig b/src/tui/options_tab.zig
index 4c9cb2a..20d4557 100644
--- a/src/tui/options_tab.zig
+++ b/src/tui/options_tab.zig
@@ -24,9 +24,9 @@ pub fn loadData(app: *App) void {
     app.options_data = result.data;
     app.options_timestamp = result.timestamp;
     app.options_cursor = 0;
-    app.options_expanded = [_]bool{false} ** 64;
-    app.options_calls_collapsed = [_]bool{false} ** 64;
-    app.options_puts_collapsed = [_]bool{false} ** 64;
+    app.options_expanded = @splat(false);
+    app.options_calls_collapsed = @splat(false);
+    app.options_puts_collapsed = @splat(false);
     app.rebuildOptionsRows();
     app.setStatus(if (result.source == .cached) "Cached (1hr TTL) | r/F5 to refresh" else "Fetched | r/F5 to refresh");
 }
diff --git a/src/tui/portfolio_tab.zig b/src/tui/portfolio_tab.zig
index 01b5133..fabf203 100644
--- a/src/tui/portfolio_tab.zig
+++ b/src/tui/portfolio_tab.zig
@@ -1224,7 +1224,7 @@ pub fn reloadPortfolioFile(app: *App) void {
 
     // Recompute summary using cached prices (no network)
     app.freePortfolioSummary();
-    app.expanded = [_]bool{false} ** 64;
+    app.expanded = @splat(false);
     app.cash_expanded = false;
     app.illiquid_expanded = false;
     app.cursor = 0;