docs: add README.vi.md Vietnamese translation, document pipeline picker

Adds README.vi.md as the Vietnamese translation of README.md, and
documents the pipeline-template picker/CLI switch (ccam lanes pipeline)
added in the previous feature.

README.md

@@ -6,6 +6,8 @@ tool call to an Express + SQLite server, a React UI updates over WebSocket, and
 
 Internal build — all rights reserved.
 
+*(Tiếng Việt: [README.vi.md](README.vi.md))*
+
 ## What it does
 
 - **Sessions, agents, events.** Everything Claude Code emits, recorded and
@@ -75,6 +77,7 @@ ccam status            # is the dashboard up
 ccam start             # start it in the background and wait for healthy
 ccam sessions          # recent sessions
 ccam lanes             # lanes with stage and progress
+ccam lanes pipeline    # this lane's pipeline template, or switch it
 ccam stage <name>      # declare the current lane's stage
 ccam tail              # live event feed
 ```
@@ -101,6 +104,12 @@ events and expires after `DETECTION_TTL_MS` (default 5 minutes), so a lane can
 move backwards between work sessions. Detection never writes the declared stage,
 and an inferred node never renders as done.
 
+A lane's pipeline template can be switched after creation — `ccam lanes
+pipeline <template>` from the terminal, or the pipeline-template picker next to
+the lane's title in the Workspace detail panel. Both re-resolve the lane's
+current declared stage against the new template's nodes and warn if it no
+longer matches one.
+
 A lane can also run **its own application stack**, isolated per lane, when its
 repository declares a profile at `<repo>/.ccam/profile/` — a `profile.env` of
 declarations plus shell hooks the dashboard calls. Each lane gets a slot, and its