v0.0.9: Group management — leave, kick, members

Server:
- POST /groups/:name/leave — remove self from group
- POST /groups/:name/kick — creator can kick members
- GET /groups/:name/members — list with aliases + creator badge

CLI TUI:
- /gleave — leave current group
- /gkick <fp_or_alias> — kick (creator only)
- /gmembers — show member list with aliases and ★ for creator

Web client:
- Same commands: /gleave, /gkick, /gmembers

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/Cargo.lock

@@ -2647,7 +2647,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-client"
-version = "0.0.8"
+version = "0.0.9"
 dependencies = [
  "anyhow",
  "argon2",
@@ -2680,7 +2680,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-mule"
-version = "0.0.8"
+version = "0.0.9"
 dependencies = [
  "anyhow",
  "clap",
@@ -2689,7 +2689,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-protocol"
-version = "0.0.8"
+version = "0.0.9"
 dependencies = [
  "base64",
  "bincode",
@@ -2712,7 +2712,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-server"
-version = "0.0.8"
+version = "0.0.9"
 dependencies = [
  "anyhow",
  "axum",
@@ -2739,7 +2739,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-wasm"
-version = "0.0.8"
+version = "0.0.9"
 dependencies = [
  "base64",
  "bincode",