feat: remove import agent feature from UI

Remove the import agent functionality from the app while preserving
the underlying resume capability in the agent code.

Changes:
- Remove ImportAgentModal and import flow from create-agent-modal.tsx
- Remove "Import Agent" menu item from agent screen
- Remove "Import" button from home footer
- Remove resumeAgent from session context and store
- Remove list_persisted_agents WS messages from server
- Remove handleListPersistedAgentsRequest handler
- Clean up unused styles and types

The resumeAgent capability remains in the agent manager for potential
future use or internal tooling.

packages/server/src/server/messages.ts

@@ -407,12 +407,6 @@ export const RestartServerRequestMessageSchema = z.object({
   reason: z.string().optional(),
 });
 
-export const ListPersistedAgentsRequestMessageSchema = z.object({
-  type: z.literal("list_persisted_agents_request"),
-  provider: AgentProviderSchema.optional(),
-  limit: z.number().int().positive().optional(),
-});
-
 export const InitializeAgentRequestMessageSchema = z.object({
   type: z.literal("initialize_agent_request"),
   agentId: z.string(),
@@ -557,7 +551,6 @@ export const SessionInboundMessageSchema = z.discriminatedUnion("type", [
   HighlightedDiffRequestSchema,
   FileExplorerRequestSchema,
   FileDownloadTokenRequestSchema,
-  ListPersistedAgentsRequestMessageSchema,
   GitRepoInfoRequestMessageSchema,
   ClearAgentAttentionMessageSchema,
 ]);
@@ -750,25 +743,6 @@ export const AgentDeletedMessageSchema = z.object({
   }),
 });
 
-const PersistedAgentDescriptorPayloadSchema = z.object({
-  provider: AgentProviderSchema,
-  sessionId: z.string(),
-  cwd: z.string(),
-  title: z.string(),
-  lastActivityAt: z.string(),
-  persistence: AgentPersistenceHandleSchema,
-  timeline: z.array(AgentTimelineItemPayloadSchema),
-});
-
-export type PersistedAgentDescriptorPayload = z.infer<typeof PersistedAgentDescriptorPayloadSchema>;
-
-export const ListPersistedAgentsResponseSchema = z.object({
-  type: z.literal("list_persisted_agents_response"),
-  payload: z.object({
-    items: z.array(PersistedAgentDescriptorPayloadSchema),
-  }),
-});
-
 export const GitDiffResponseSchema = z.object({
   type: z.literal("git_diff_response"),
   payload: z.object({
@@ -863,7 +837,6 @@ export const SessionOutboundMessageSchema = z.discriminatedUnion("type", [
   AgentPermissionRequestMessageSchema,
   AgentPermissionResolvedMessageSchema,
   AgentDeletedMessageSchema,
-  ListPersistedAgentsResponseSchema,
   GitDiffResponseSchema,
   HighlightedDiffResponseSchema,
   FileExplorerResponseSchema,
@@ -896,7 +869,6 @@ export type DeleteConversationResponseMessage = z.infer<typeof DeleteConversatio
 export type AgentPermissionRequestMessage = z.infer<typeof AgentPermissionRequestMessageSchema>;
 export type AgentPermissionResolvedMessage = z.infer<typeof AgentPermissionResolvedMessageSchema>;
 export type AgentDeletedMessage = z.infer<typeof AgentDeletedMessageSchema>;
-export type ListPersistedAgentsResponseMessage = z.infer<typeof ListPersistedAgentsResponseSchema>;
 export type ListProviderModelsResponseMessage = z.infer<
   typeof ListProviderModelsResponseMessageSchema
 >;
@@ -916,7 +888,6 @@ export type ListProviderModelsRequestMessage = z.infer<
 >;
 export type ResumeAgentRequestMessage = z.infer<typeof ResumeAgentRequestMessageSchema>;
 export type DeleteAgentRequestMessage = z.infer<typeof DeleteAgentRequestMessageSchema>;
-export type ListPersistedAgentsRequestMessage = z.infer<typeof ListPersistedAgentsRequestMessageSchema>;
 export type InitializeAgentRequestMessage = z.infer<typeof InitializeAgentRequestMessageSchema>;
 export type SetAgentModeMessage = z.infer<typeof SetAgentModeMessageSchema>;
 export type AgentPermissionResponseMessage = z.infer<typeof AgentPermissionResponseMessageSchema>;

packages/server/src/server/session.ts

@@ -856,10 +856,6 @@ export class Session {
           await this.handleFileDownloadTokenRequest(msg);
           break;
 
-        case "list_persisted_agents_request":
-          await this.handleListPersistedAgentsRequest(msg);
-          break;
-
         case "git_repo_info_request":
           await this.handleGitRepoInfoRequest(msg);
           break;
@@ -1550,9 +1546,18 @@ export class Session {
     }
 
     if (normalized.createWorktree) {
-      const targetBranch = normalized.createNewBranch
-        ? normalized.newBranchName
-        : normalized.baseBranch;
+      let targetBranch: string;
+
+      if (normalized.createNewBranch) {
+        targetBranch = normalized.newBranchName!;
+      } else {
+        // Resolve current branch name from HEAD
+        const { stdout } = await execAsync("git rev-parse --abbrev-ref HEAD", {
+          cwd,
+          env: READ_ONLY_GIT_ENV,
+        });
+        targetBranch = stdout.trim();
+      }
 
       if (!targetBranch) {
         throw new Error(
@@ -1730,12 +1735,6 @@ export class Session {
       }
     }
 
-    if (createWorktree && !createNewBranch && !baseBranch) {
-      throw new Error(
-        "Base branch is required when creating a worktree without a new branch"
-      );
-    }
-
     return {
       baseBranch,
       createNewBranch,
@@ -1836,48 +1835,6 @@ export class Session {
     }
   }
 
-  private async handleListPersistedAgentsRequest(
-    msg: Extract<SessionInboundMessage, { type: "list_persisted_agents_request" }>
-  ): Promise<void> {
-    const { provider, limit } = msg;
-    try {
-      const entries = await this.agentManager.listPersistedAgents({
-        provider,
-        limit,
-      });
-      this.emit({
-        type: "list_persisted_agents_response",
-        payload: {
-          items: entries.map((entry) => ({
-            provider: entry.provider,
-            sessionId: entry.sessionId,
-            cwd: entry.cwd,
-            title: entry.title ?? `Session ${entry.sessionId.slice(0, 8)}`,
-            lastActivityAt: entry.lastActivityAt.toISOString(),
-            persistence: entry.persistence,
-            timeline: entry.timeline ?? [],
-          })),
-        },
-      });
-    } catch (error) {
-      console.error(
-        `[Session ${this.clientId}] Failed to list persisted agents:`,
-        error
-      );
-      this.emit({
-        type: "activity_log",
-        payload: {
-          id: uuidv4(),
-          timestamp: new Date(),
-          type: "error",
-          content: `Failed to list saved agents: ${
-            (error as Error)?.message ?? error
-          }`,
-        },
-      });
-    }
-  }
-
   /**
    * Handle set agent mode request
    */

packages/server/src/server/test-utils/daemon-client.ts

@@ -5,7 +5,6 @@ import type {
   SessionOutboundMessage,
   AgentSnapshotPayload,
   AgentStreamEventPayload,
-  PersistedAgentDescriptorPayload,
 } from "../messages.js";
 import type {
   AgentModelDefinition,
@@ -296,16 +295,6 @@ export class DaemonClient {
     );
   }
 
-  async listPersistedAgents(): Promise<PersistedAgentDescriptorPayload[]> {
-    this.send({ type: "list_persisted_agents_request" });
-    return this.waitFor((msg) => {
-      if (msg.type === "list_persisted_agents_response") {
-        return msg.payload.items;
-      }
-      return null;
-    });
-  }
-
   async resumeAgent(
     handle: AgentPersistenceHandle,
     overrides?: Partial<CreateAgentOptions>