feat: Add ModeContext and ModeSwitcher UI

.linear.toml

@@ -0,0 +1,6 @@
+# Linear CLI configuration for Pinecone Explorer
+# https://github.com/schpet/linear-cli
+
+workspace = "pinecone-explorer"
+team_id = "PINE"
+issue_sort = "priority"

electron/connection-store.ts

@@ -297,6 +297,29 @@ export class ConnectionStore {
 
     return result
   }
+
+  /**
+   * Get the preferred explorer mode for a profile
+   */
+  getPreferredMode(profileId: string): 'index' | 'assistant' | null {
+    const profile = this.getProfile(profileId)
+    return profile?.preferredMode ?? null
+  }
+
+  /**
+   * Set the preferred explorer mode for a profile
+   */
+  setPreferredMode(profileId: string, mode: 'index' | 'assistant'): void {
+    const profiles = this.getProfiles()
+    const profile = profiles.find((p) => p.id === profileId)
+
+    if (!profile) {
+      throw new Error(`Profile not found: ${profileId}`)
+    }
+
+    profile.preferredMode = mode
+    getStore().set('profiles', profiles)
+  }
 }
 
 export const connectionStore = new ConnectionStore()

electron/main.ts

@@ -777,6 +777,26 @@ ipcMain.handle('profiles:clearHybridEmbeddingOverride', async (_event, profileId
   }
 })
 
+ipcMain.handle('profiles:getPreferredMode', async (_event, profileId: string) => {
+  try {
+    const mode = connectionStore.getPreferredMode(profileId)
+    return { success: true, data: mode }
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Failed to get preferred mode'
+    return { success: false, error: message }
+  }
+})
+
+ipcMain.handle('profiles:setPreferredMode', async (_event, profileId: string, mode: 'index' | 'assistant') => {
+  try {
+    connectionStore.setPreferredMode(profileId, mode)
+    return { success: true }
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Failed to set preferred mode'
+    return { success: false, error: message }
+  }
+})
+
 // ============================================================================
 // Window Management IPC Handlers
 // ============================================================================

electron/preload.ts

@@ -294,6 +294,19 @@ contextBridge.exposeInMainWorld('electronAPI', {
         throw new Error(result.error)
       }
     },
+    getPreferredMode: async (profileId: string): Promise<'index' | 'assistant' | null> => {
+      const result = await ipcRenderer.invoke('profiles:getPreferredMode', profileId)
+      if (!result.success) {
+        throw new Error(result.error)
+      }
+      return result.data
+    },
+    setPreferredMode: async (profileId: string, mode: 'index' | 'assistant'): Promise<void> => {
+      const result = await ipcRenderer.invoke('profiles:setPreferredMode', profileId, mode)
+      if (!result.success) {
+        throw new Error(result.error)
+      }
+    },
   },
   window: {
     createConnection: async (profile: ConnectionProfile): Promise<{ windowId: string }> => {

electron/types.ts

@@ -50,6 +50,11 @@ export interface HybridEmbeddingConfig {
   defaultAlpha?: number           // Default alpha for queries (0.5 if not set)
 }
 
+/**
+ * Explorer mode type - Index Explorer or Assistant Explorer
+ */
+export type ExplorerMode = 'index' | 'assistant'
+
 /**
  * Connection profile for Pinecone
  */
@@ -75,6 +80,9 @@ export interface ConnectionProfile {
   // Per-index text field overrides (metadata field containing text for embedding)
   // Default is '_text' if not specified
   textFieldOverrides?: Record<string, string>
+
+  // Preferred explorer mode (index or assistant)
+  preferredMode?: ExplorerMode
 }
 
 /**