refactor(llm-deepseek)!: rename the provider route to deepseek-official

The native adapter's route was named deepseek, colliding with pi-ai's
catalog provider of the same name, so the two DeepSeek paths could never
be mounted side by side. The web settings page needs both configurable at
once. Compositions, fixtures, goldens, scaffolding defaults, and docs all
move together (pre-release, no shim); TUI/session-query-spill/
missing-credential goldens re-recorded through their keyless refresh
modes because provider-name length shifts box padding and spill
truncation points.

packages/sdk/create-sdk/src/args.ts

@@ -11,7 +11,7 @@ import type { PackageManagerName, RunInterface } from '@deepseek-ai/dsh-helper'
 export interface CreateArgs {
   directory?: string
   description?: string
-  provider?: 'deepseek' | 'custom'
+  provider?: 'deepseek-official' | 'custom'
   baseURL?: string
   apiKey?: string
   model?: string
@@ -27,7 +27,7 @@ export interface CreateArgs {
 
 interface CommanderCreateOptions {
   description?: string
-  provider?: 'deepseek' | 'custom'
+  provider?: 'deepseek-official' | 'custom'
   baseUrl?: string
   apiKey?: string
   model?: string
@@ -57,7 +57,7 @@ function createProgram(): Command {
     .argument('[directory]')
     .option('-h, --help')
     .option('--description <text>')
-    .addOption(new Option('--provider <name>').choices(['deepseek', 'custom']))
+    .addOption(new Option('--provider <name>').choices(['deepseek-official', 'custom']))
     .option('--base-url <url>')
     .option('--api-key <key>')
     .option('--model <name>')

packages/sdk/create-sdk/src/create-questions.ts

@@ -24,7 +24,7 @@ export interface ProjectAnswers {
   directory: string
   name: string
   description: string
-  provider: 'deepseek' | 'custom'
+  provider: 'deepseek-official' | 'custom'
   baseURL: string
   apiKey: string
   model: string
@@ -142,14 +142,14 @@ const PROJECT_QUESTION_STEPS: readonly WizardStep<ProjectAnswerState>[] = [
     apply: (state, value) => { state.description = value },
   }),
   questionStep({
-    question: () => new SelectQuestion<'deepseek' | 'custom'>({
+    question: () => new SelectQuestion<'deepseek-official' | 'custom'>({
       id: 'provider',
       message: 'Model provider',
       options: [
-        { value: 'deepseek', label: 'DeepSeek' },
+        { value: 'deepseek-official', label: 'DeepSeek' },
         { value: 'custom', label: 'Custom endpoint (pi-ai)' },
       ],
-      initialValue: 'deepseek',
+      initialValue: 'deepseek-official',
     }),
     prefilled: state => state.args.provider,
     apply: (state, value) => { state.provider = value },

packages/sdk/create-sdk/src/headless.ts

@@ -18,7 +18,7 @@ import type { CreateArgs } from './args.ts'
 interface HeadlessCreateSpec {
   directory?: string
   description?: string
-  provider?: 'deepseek' | 'custom'
+  provider?: 'deepseek-official' | 'custom'
   baseURL?: string
   apiKey?: string
   model?: string

packages/sdk/create-sdk/src/templates/assets/usage.txt.tpl

@@ -2,7 +2,7 @@ Usage: create-sdk [directory] [options]
 
 Options:
   --description <text>
-  --provider <deepseek|custom>
+  --provider <deepseek-official|custom>
   --base-url <url>
   --api-key <key>
   --model <name>