Refine chat controls and add explicit owner recovery reset

Simplify the ASCII interface, expose owner setup, and load any selected number of messages using bounded history batches. Add backend-only owner reset with a matching public fingerprint and stopped-service guards, and document the loss of old history and key continuity.

1 files changed, 22 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index 08c88f5..4c528da 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -51,8 +51,17 @@ struct Cli {
 enum Action {
     #[command(about = "Run the experimental local chat or initialize its single .env")]
     Chat {
-        #[arg(long)]
+        #[arg(long, conflicts_with_all = ["reset_owner", "owner_fingerprint"])]
         init: bool,
+        #[arg(
+            long,
+            value_name = "FINGERPRINT",
+            conflicts_with = "owner_fingerprint",
+            help = "Permanently clear owner registration and chat history after key loss"
+        )]
+        reset_owner: Option<String>,
+        #[arg(long, help = "Print the registered owner's public fingerprint")]
+        owner_fingerprint: bool,
     },
     #[command(about = "Start the local development services")]
     Dev {
@@ -132,7 +141,12 @@ fn execute(arguments: Cli) -> Result<()> {
         return archive::restore(&absolute(archive)?, &absolute(destination)?);
     }
     let project = Project::discover(arguments.root.as_deref())?;
-    if let Action::Chat { init } = arguments.command {
+    if let Action::Chat {
+        init,
+        reset_owner,
+        owner_fingerprint,
+    } = arguments.command
+    {
         let mut command = project.command("cargo")?;
         command
             .args(["run", "--locked", "-p", "stack-chat-server", "--", "--root"])
@@ -140,6 +154,12 @@ fn execute(arguments: Cli) -> Result<()> {
         if init {
             command.arg("--init");
         }
+        if let Some(fingerprint) = reset_owner {
+            command.arg("--reset-owner").arg(fingerprint);
+        }
+        if owner_fingerprint {
+            command.arg("--owner-fingerprint");
+        }
         return process::run(&mut command);
     }
     let _operation = project.lock()?;