feat: completions update, create promptrequest, LLM flag rename, ACP content fix

- Add prompts/promptrequests to shell completions (fish + bash)
- Add approve, setup, prompt, promptrequest commands to completions
- Add `create promptrequest` CLI command (POST /projects/:name/promptrequests)
- Rename --proxy-mode-llm-provider/model to --llm-provider/model
- Fix ACP client: handle single-object content format from real Gemini
- Add tests for single-object content and agent_thought_chunk filtering

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

completions/mcpctl.bash

@@ -2,10 +2,10 @@ _mcpctl() {
   local cur prev words cword
   _init_completion || return
 
-  local commands="status login logout config get describe delete logs create edit apply backup restore mcp help"
+  local commands="status login logout config get describe delete logs create edit apply backup restore mcp approve help"
   local project_commands="attach-server detach-server get describe delete logs create edit help"
   local global_opts="-v --version --daemon-url --direct --project -h --help"
-  local resources="servers instances secrets templates projects users groups rbac"
+  local resources="servers instances secrets templates projects users groups rbac prompts promptrequests"
 
   # Check if --project was given
   local has_project=false
@@ -78,7 +78,7 @@ _mcpctl() {
   case "$subcmd" in
     config)
       if [[ $((cword - subcmd_pos)) -eq 1 ]]; then
-        COMPREPLY=($(compgen -W "view set path reset claude impersonate help" -- "$cur"))
+        COMPREPLY=($(compgen -W "view set path reset claude claude-generate setup impersonate help" -- "$cur"))
       fi
       return ;;
     status)
@@ -114,7 +114,7 @@ _mcpctl() {
       return ;;
     create)
       if [[ $((cword - subcmd_pos)) -eq 1 ]]; then
-        COMPREPLY=($(compgen -W "server secret project user group rbac help" -- "$cur"))
+        COMPREPLY=($(compgen -W "server secret project user group rbac prompt promptrequest help" -- "$cur"))
       fi
       return ;;
     apply)
@@ -150,6 +150,15 @@ _mcpctl() {
       fi
       COMPREPLY=($(compgen -W "$names" -- "$cur"))
       return ;;
+    approve)
+      if [[ -z "$resource_type" ]]; then
+        COMPREPLY=($(compgen -W "promptrequest" -- "$cur"))
+      else
+        local names
+        names=$(_mcpctl_resource_names "$resource_type")
+        COMPREPLY=($(compgen -W "$names" -- "$cur"))
+      fi
+      return ;;
     help)
       COMPREPLY=($(compgen -W "$commands" -- "$cur"))
       return ;;