Next-edit: n-gram speculative decoding on the companion server (0.6.2)

The rewritten region is mostly a copy of the current one, so prompt-lookup drafts are
accepted in long runs. Greedy decoding keeps the output identical. Laptop CPU, 160-token
region rewrite: generation 1.76 s -> 0.37 s. Timings now include errorsMs/promptMs/genMs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J39imRDT8L7xYbWzsVWd8A

daemon/src/config.ts

@@ -32,6 +32,9 @@ export interface DaemonConfig {
     ctx: number
     /** Extra flags, e.g. ["-ngl", "99"] on Apple Silicon, ["-t", "16"] on the laptop CPU. */
     args: string[]
+    /** Extra flags for the next-edit companion server only. Default: n-gram speculative decoding (the output is
+     *  mostly a copy of the region, so drafts from the prompt are accepted; exact with greedy sampling). */
+    nextEditArgs?: string[]
   }
   models: Record<string, ModelProfile>
   defaultModel: string