feat: complete Phase 2 network features for spellbooks

Sharing Enhancements:
- Install qrcode library for QR code generation
- Create ShareSpellbookDialog with tabbed interface
- Support multiple share formats: Web URL, naddr, nevent
- QR code generation and download for each format
- Quick copy buttons with visual feedback
- Integrated into SpellbookDetailRenderer

Network Discovery:
- Add "Discover" filter to browse spellbooks from other users
- Query AGGREGATOR_RELAYS for network spellbook discovery
- Show author names using UserName component
- Conditional UI: hide owner actions for discovered spellbooks
- Support viewing and applying layouts from the community

Preview Route Polish:
- Loading states with spinner during NIP-05 resolution
- 10-second timeout for NIP-05 resolution
- Error banners for resolution failures
- Author name and creation date in preview banner
- Copy link button in preview mode

Conflict Resolution:
- compareSpellbookVersions() function in spellbook-manager
- ConflictResolutionDialog component for version conflicts
- Side-by-side comparison of local vs network versions
- Show workspace/window counts and timestamps

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

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

src/actions/publish-spellbook.test.ts

@@ -4,6 +4,13 @@ import type { ActionHub } from "applesauce-actions";
 import type { GrimoireState } from "@/types/app";
 import type { NostrEvent } from "nostr-tools/core";
 
+// Mock accountManager
+vi.mock("@/services/accounts", () => ({
+  default: {
+    active: null, // Will be set in tests
+  },
+}));
+
 // Mock implementations
 const mockSigner = {
   getPublicKey: vi.fn(async () => "test-pubkey"),
@@ -29,9 +36,6 @@ const mockFactory = {
 };
 
 const mockHub: ActionHub = {
-  accountManager: {
-    active: mockAccount,
-  },
   factory: mockFactory,
 } as any;
 
@@ -59,8 +63,12 @@ const mockState: GrimoireState = {
 } as any;
 
 describe("PublishSpellbook action", () => {
-  beforeEach(() => {
+  beforeEach(async () => {
     vi.clearAllMocks();
+
+    // Set up accountManager mock
+    const accountManager = await import("@/services/accounts");
+    (accountManager.default as any).active = mockAccount;
   });
 
   describe("validation", () => {
@@ -87,37 +95,38 @@ describe("PublishSpellbook action", () => {
     });
 
     it("should throw error if no active account", async () => {
-      const hubWithoutAccount: ActionHub = {
-        ...mockHub,
-        accountManager: { active: null } as any,
-      };
+      const accountManager = await import("@/services/accounts");
+      (accountManager.default as any).active = null;
 
       await expect(async () => {
-        for await (const event of PublishSpellbook(hubWithoutAccount, {
+        for await (const event of PublishSpellbook(mockHub, {
           state: mockState,
           title: "Test Spellbook",
         })) {
           // Should not reach here
         }
       }).rejects.toThrow("No active account");
+
+      // Restore for other tests
+      (accountManager.default as any).active = mockAccount;
     });
 
     it("should throw error if no signer available", async () => {
-      const hubWithoutSigner: ActionHub = {
-        ...mockHub,
-        accountManager: {
-          active: { ...mockAccount, signer: null } as any,
-        } as any,
-      };
+      const accountManager = await import("@/services/accounts");
+      const accountWithoutSigner = { ...mockAccount, signer: null };
+      (accountManager.default as any).active = accountWithoutSigner;
 
       await expect(async () => {
-        for await (const event of PublishSpellbook(hubWithoutSigner, {
+        for await (const event of PublishSpellbook(mockHub, {
           state: mockState,
           title: "Test Spellbook",
         })) {
           // Should not reach here
         }
       }).rejects.toThrow("No signer available");
+
+      // Restore for other tests
+      (accountManager.default as any).active = mockAccount;
     });
   });
 

src/actions/publish-spellbook.ts

@@ -5,6 +5,7 @@ import { GrimoireState } from "@/types/app";
 import { SpellbookContent } from "@/types/spell";
 import { mergeRelaySets } from "applesauce-core/helpers";
 import { AGGREGATOR_RELAYS } from "@/services/loaders";
+import accountManager from "@/services/accounts";
 import type { ActionHub } from "applesauce-actions";
 import type { NostrEvent } from "nostr-tools/core";
 
@@ -55,7 +56,7 @@ export async function* PublishSpellbook(
     throw new Error("Title is required");
   }
 
-  const account = hub.accountManager?.active;
+  const account = accountManager.active;
   if (!account) {
     throw new Error("No active account. Please log in first.");
   }