feat(onboarding): add web search to onboarding flow (#34009)

* add web search to onboarding flow

* remove post onboarding step (now redundant)

* post-onboarding nudge if no web search set up

* address comments

* fix test mocking

* add enabled: false assertion to the no-key test

* --skip-search cli flag

* use provider that a user has a key for

* add assertions, replace the duplicated switch blocks

* test for quickstart fast-path with existing config key

* address comments

* cover quickstart falls through to key test

* bring back key source

* normalize secret inputs instead of direct string trimming

* preserve enabled: false if it's already set

* handle missing API keys in flow

* doc updates

* hasExistingKey to detect both plaintext strings and SecretRef objects

* preserve enabled state only on the "keep current" paths

* add test for preserving

* better gate flows

* guard against invalid provider values in config

* Update src/commands/configure.wizard.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* format fix

* only mentions env var when it's actually available

* search apiKey fields now typed as SecretInput

* if no provider check if any search provider key is detectable

* handle both kimi keys

* remove .filter(Boolean)

* do not disable web_search after user enables it

* update resolveSearchProvider

* fix(onboarding): skip search key prompt in ref mode

* fix: add onboarding web search step (#34009) (thanks @kesku)

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
Co-authored-by: Shadow <hi@shadowing.dev>

docs/reference/api-usage-costs.md

@@ -75,12 +75,15 @@ You can keep it local with `memorySearch.provider = "local"` (no API usage).
 
 See [Memory](/concepts/memory).
 
-### 4) Web search tool (Brave / Perplexity via OpenRouter)
+### 4) Web search tool
 
-`web_search` uses API keys and may incur usage charges:
+`web_search` uses API keys and may incur usage charges depending on your provider:
 
+- **Perplexity Search API**: `PERPLEXITY_API_KEY`
 - **Brave Search API**: `BRAVE_API_KEY` or `tools.web.search.apiKey`
-- **Perplexity** (via OpenRouter): `PERPLEXITY_API_KEY` or `OPENROUTER_API_KEY`
+- **Gemini (Google Search)**: `GEMINI_API_KEY`
+- **Grok (xAI)**: `XAI_API_KEY`
+- **Kimi (Moonshot)**: `KIMI_API_KEY` or `MOONSHOT_API_KEY`
 
 See [Web tools](/tools/web).