Declutter action bars: overflow menu, browse toggle, conditional D20

Top bar stripped to turn navigation only (Prev, round badge, Clear, Next).
Roll All Initiative, Manage Sources, and Bulk Import moved to a new
overflow menu in the bottom bar. Player Characters also moved there.

Browse stat blocks is now an Eye/EyeOff toggle inside the search input
that switches between add mode and browse mode. Add button only appears
when entering a custom creature name. Roll All Initiative button shows
conditionally — only when bestiary creatures lack initiative values.

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

apps/web/src/components/__tests__/turn-navigation.test.tsx

@@ -26,8 +26,6 @@ function renderNav(overrides: Partial<Encounter> = {}) {
 			onAdvanceTurn={vi.fn()}
 			onRetreatTurn={vi.fn()}
 			onClearEncounter={vi.fn()}
-			onRollAllInitiative={vi.fn()}
-			onOpenSourceManager={vi.fn()}
 		/>,
 	);
 }
@@ -72,8 +70,6 @@ describe("TurnNavigation", () => {
 					onAdvanceTurn={vi.fn()}
 					onRetreatTurn={vi.fn()}
 					onClearEncounter={vi.fn()}
-					onRollAllInitiative={vi.fn()}
-					onOpenSourceManager={vi.fn()}
 				/>,
 			);
 			expect(screen.getByText("R2")).toBeInTheDocument();
@@ -88,8 +84,6 @@ describe("TurnNavigation", () => {
 					onAdvanceTurn={vi.fn()}
 					onRetreatTurn={vi.fn()}
 					onClearEncounter={vi.fn()}
-					onRollAllInitiative={vi.fn()}
-					onOpenSourceManager={vi.fn()}
 				/>,
 			);
 			expect(screen.getByText("R3")).toBeInTheDocument();
@@ -110,8 +104,6 @@ describe("TurnNavigation", () => {
 					onAdvanceTurn={vi.fn()}
 					onRetreatTurn={vi.fn()}
 					onClearEncounter={vi.fn()}
-					onRollAllInitiative={vi.fn()}
-					onOpenSourceManager={vi.fn()}
 				/>,
 			);
 			expect(screen.getByText("Goblin")).toBeInTheDocument();
@@ -129,8 +121,6 @@ describe("TurnNavigation", () => {
 					onAdvanceTurn={vi.fn()}
 					onRetreatTurn={vi.fn()}
 					onClearEncounter={vi.fn()}
-					onRollAllInitiative={vi.fn()}
-					onOpenSourceManager={vi.fn()}
 				/>,
 			);
 			expect(screen.getByText("Conjurer")).toBeInTheDocument();
@@ -173,16 +163,6 @@ describe("TurnNavigation", () => {
 			expect(
 				screen.getByRole("button", { name: "Next turn" }),
 			).toBeInTheDocument();
-			expect(
-				screen.getByRole("button", {
-					name: "Roll all initiative",
-				}),
-			).toBeInTheDocument();
-			expect(
-				screen.getByRole("button", {
-					name: "Manage cached sources",
-				}),
-			).toBeInTheDocument();
 		});
 
 		it("renders a 40-character name without truncation class issues", () => {