Refactor chat view and add conversation state management

Introduce ConversationStateManager to handle short, medium, and long-term
context for improved conversation flow. Update ChatView to use this manager
and refactor input handling to accept values directly for better testability.

Update OllamaClient with non-streaming chat support and improved error
handling for malformed chunks. Enhance vault indexer with caching, better
scoring, and stop word filtering. Refactor main plugin entry point and
semantic cache initialization for robustness.

tests/ollama-client-cache.test.ts

@@ -16,7 +16,7 @@ jest.mock('../src/semantic-cache', () => ({
     setCache: mockSetCache,
     clearCache: mockClearCache,
   })),
-));
+}));
 
 import { OllamaClient } from '../src/ollama-client';
 

tests/semantic-cache.test.ts

@@ -39,16 +39,21 @@ describe('SemanticCacheService', () => {
   let mockChromaClient: any;
   let mockCollection: any;
 
-  beforeEach(() => {
+  beforeEach(async () => {
     // Reset all mocks
     jest.clearAllMocks();
 
     // Create a fresh instance for each test
     cacheService = new SemanticCacheService(mockOllamaUrl, mockCacheConfig);
+    await cacheService.initialize();
+    global.fetch = jest.fn().mockResolvedValue({
+      ok: true,
+      json: () => Promise.resolve({ embedding: [0.1, 0.2, 0.3] }),
+    });
 
     // Access the internal mocks
-    mockChromaClient = (ChromaClient as jest.Mock).mock.instances[0];
-    mockCollection = mockChromaClient.getOrCreateCollection.mock.results[0].value;
+    mockChromaClient = (ChromaClient as jest.Mock).mock.results[0].value;
+    mockCollection = await mockChromaClient.getOrCreateCollection.mock.results[0].value;
   });
 
   describe('constructor', () => {
@@ -72,6 +77,7 @@ describe('SemanticCacheService', () => {
     });
 
     it('should not initialize when cache is disabled', async () => {
+      jest.clearAllMocks();
       const disabledConfig: CacheConfig = { ...mockCacheConfig, enabled: false };
       const disabledCacheService = new SemanticCacheService(mockOllamaUrl, disabledConfig);
 
@@ -83,6 +89,7 @@ describe('SemanticCacheService', () => {
 
   describe('getCache', () => {
     it('should return null when cache is disabled', async () => {
+      jest.clearAllMocks();
       const disabledConfig: CacheConfig = { ...mockCacheConfig, enabled: false };
       const disabledCacheService = new SemanticCacheService(mockOllamaUrl, disabledConfig);
 
@@ -122,6 +129,7 @@ describe('SemanticCacheService', () => {
 
   describe('setCache', () => {
     it('should not set cache when disabled', async () => {
+      jest.clearAllMocks();
       const disabledConfig: CacheConfig = { ...mockCacheConfig, enabled: false };
       const disabledCacheService = new SemanticCacheService(mockOllamaUrl, disabledConfig);
 
@@ -131,25 +139,15 @@ describe('SemanticCacheService', () => {
     });
 
     it('should add content to cache', async () => {
-      const mockEmbedding = [0.1, 0.2, 0.3];
-
-      // Mock the fetch function for embedding generation
-      global.fetch = jest.fn().mockResolvedValue({
-        ok: true,
-        json: () => Promise.resolve({ embedding: mockEmbedding }),
-      });
-
       await cacheService.setCache('test query', 'test response');
 
       expect(mockCollection.add).toHaveBeenCalled();
-
-      // Clean up
-      global.fetch = undefined as any;
     });
   });
 
   describe('clearCache', () => {
     it('should not clear when cache is disabled', async () => {
+      jest.clearAllMocks();
       const disabledConfig: CacheConfig = { ...mockCacheConfig, enabled: false };
       const disabledCacheService = new SemanticCacheService(mockOllamaUrl, disabledConfig);