refine ti-cli quick start (#23935)

Author: guangleibao

ai/ti/ti-quick-start.md

@@ -1,6 +1,6 @@
 ---
 title: Get Started with TiDB Cloud CLI
-summary: Install and configure TiDB Cloud CLI, then create and use a file system or query a TiDB Cloud Starter database.
+summary: Install and configure TiDB Cloud CLI, then create and use a file system or manage and query a TiDB Cloud Starter database.
 ---
 
 # Get Started with TiDB Cloud CLI
@@ -86,73 +86,58 @@ Depending on your operating system, take the following steps to install TiDB Clo
 
 2. Provide the following information:
 
-    - A default region for CLI operations, specified as a region code (such as `aws-us-east-1`). For a list of regions that are supported by TiDB Cloud CLI, see [Supported regions](/ai/ti/reference/ti-regions-security-and-limitations.md#supported-regions).
+    - A default region for CLI operations, specified as a region code (such as `aws-us-west-2`). For a list of regions that are supported by TiDB Cloud CLI, see [Supported regions](/ai/ti/reference/ti-regions-security-and-limitations.md#supported-regions).
     - Your TiDB Cloud API public key and private key.
 
 3. Run a read-only command to verify that the CLI can access TiDB Cloud using the saved credentials:
 
     ```bash
-    ti db list-db-clusters --db-cluster-type starter --output text
+    ti fs list-file-systems
     ```
 
     Example output:
 
     ```bash
     {
-      "profile": "default",
-      "region_code": "aws-us-east-1",
-      "credentials_stored": true
+      "region_code": "aws-us-west-2",
+      "file_systems": []
     }
     ```
 
 ## Step 3. Choose a workflow
 
-Complete either of the following workflows.
+Proceed with either of the following workflows based on your needs:
 
-- [Option A: Create and use a file system](/ai/ti/ti-quick-start.md#option-a-create-and-use-a-file-system)
-- [Option B: Create a TiDB Cloud Starter instance and query the database](/ai/ti/ti-quick-start.md#option-b-create-a-tidb-cloud-starter-instance-and-query-the-database)
+- [Option A: TiDB Cloud Filesystem](/ai/ti/ti-quick-start.md#option-a-tidb-cloud-filesystem)
+- [Option B: TiDB Cloud Starter](/ai/ti/ti-quick-start.md#option-b-tidb-cloud-starter)
 
-### Option A: Create and use a file system
+### Option A: TiDB Cloud Filesystem
 
 TiDB Cloud Filesystem is a persistent, shareable cloud file system that you can use across local machines, CI jobs, sandboxes, and other ephemeral environments.
 
-1. Create a file system, wait until it is ready, and save its server-assigned ID:
+1. Create a file system and obtain the default access token (typically performed outside the sandbox):
 
     ```bash
-    export TI_FS_FILE_SYSTEM_ID="$(ti fs create-file-system \
-      --wait \
-      --query file_system_id \
-      --output text)"
+    export TI_FS_TOKEN="$(ti fs create-file-system --display-name agent-workspace --wait --query fs_token --output text --region aws-us-west-2)"
     ```
 
-    `ti` stores the file system credential locally, so you do not need to provide it for subsequent file operations.
-
-2. Write a file to the file system, and then read the file:
+2. Mount the file system to a local path and use it as a normal POSIX-compliant file system (typically performed within the sandbox):
 
     ```bash
-    printf 'hello from ti\n' | ti fs copy-file \
-      --from-stdin \
-      --to-remote /hello.txt
-
-    ti fs read-file \
-      --path /hello.txt
-    ```
-
-    Expected output:
-
-    ```text
-    hello from ti
+    export TI_FS_TOKEN=$TI_FS_TOKEN
+    mkdir ~/mnt-test
+    ti fs mount-file-system --file-system-name agent-workspace --mount-path ~/mnt-test --region aws-us-west-2
+    echo 'Hello Sandbox Workspace' >> ~/mnt-test/hello.txt
+    ls -l ~/mnt-test/hello.txt
     ```
 
-3. Delete the file system:
+3. Unmount the file system to release the workspace before passing it to another sandbox (typically performed within the sandbox):
 
     ```bash
-    ti fs delete-file-system \
-      --file-system-id "$TI_FS_FILE_SYSTEM_ID"
-    unset TI_FS_FILE_SYSTEM_ID
+    ti fs unmount-file-system --mount-path ~/mnt-test --region aws-us-west-2
     ```
 
-### Option B: Create a TiDB Cloud Starter instance and query the database
+### Option B: TiDB Cloud Starter
 
 1. Create a TiDB Cloud Starter instance and save its ID:
 
@@ -180,13 +165,13 @@ TiDB Cloud Filesystem is a persistent, shareable cloud file system that you can
 
     The `ti db execute-sql-statement` command executes the query through the HTTPS SQL API. The output includes `ready = 1`.
 
-3. Delete the TiDB Cloud Starter instance:
+3. Generate the connection string:
 
     ```bash
-    ti db delete-db-cluster \
+    DATABASE_URL=$(ti db format-db-connection-string \
       --db-cluster-id "$TI_DB_CLUSTER_ID" \
-      --wait
-    unset TI_DB_CLUSTER_ID
+      --read-write --query connection_string \
+      --output text)
     ```
 
 ## What's next