gofmt: bring internal/ and cmd/ back to gofmt -l clean

Mechanical `gofmt -w ./internal ./cmd`. Mostly struct-field realignment that
had drifted, plus a few trailing-newline fixes. No behaviour change — gofmt is
semantics-preserving, and build/vet/test are green either side.

Split out from the code-review fixes that follow so those stay reviewable
instead of hiding inside a wall of realignment.

internal/plugin/llm_passive.go

@@ -57,8 +57,8 @@ type queueItem struct {
 // LLMPassivePlugin classifies messages using Ollama and reacts accordingly.
 type LLMPassivePlugin struct {
 	Base
-	xp         *XPPlugin
-	dict       *dreamclient.Client
+	xp          *XPPlugin
+	dict        *dreamclient.Client
 	ollamaHost  string
 	ollamaModel string
 	sampleRate  float64