feat(coding-agent): extended --thinking CLI flag options

- Added `off` and `auto` as valid inputs for the `--thinking` CLI flag.
- Centralized thinking level definitions in `CLI_THINKING_LEVELS` to keep flag options, shell completions, and validation in sync.
- Configured CLI parsing to reject `inherit` as an explicit input to prevent unintended configuration suppression.

packages/coding-agent/src/cli/args.ts

@@ -1,10 +1,9 @@
 /**
  * CLI argument parsing and help display
  */
-import { type Effort, THINKING_EFFORTS } from "@oh-my-pi/pi-catalog/effort";
 import { APP_NAME, CONFIG_DIR_NAME, logger } from "@oh-my-pi/pi-utils";
 import chalk from "chalk";
-import { parseEffort } from "../thinking";
+import { CLI_THINKING_LEVELS, type ConfiguredThinkingLevel, parseCliThinkingLevel } from "../thinking";
 import { BUILTIN_TOOL_NAMES } from "../tools/builtin-names";
 import {
 	OPTIONAL_FLAGS,
@@ -32,7 +31,7 @@ export interface Args {
 	apiKey?: string;
 	systemPrompt?: string;
 	appendSystemPrompt?: string;
-	thinking?: Effort;
+	thinking?: ConfiguredThinkingLevel;
 	hideThinking?: boolean;
 	advisor?: boolean;
 	continue?: boolean;
@@ -89,9 +88,9 @@ export interface Args {
  */
 const PARSE_DEPS: ParseDeps = {
 	logger,
-	parseEffort,
+	parseThinking: parseCliThinkingLevel,
 	builtinToolNames: BUILTIN_TOOL_NAMES,
-	thinkingEfforts: THINKING_EFFORTS,
+	thinkingEfforts: CLI_THINKING_LEVELS,
 };
 
 export function parseArgs(inputArgs: string[], extensionFlags?: Map<string, { type: "boolean" | "string" }>): Args {