refactor: P0-P3 fixes, C1 cleanup, architecture diagrams, go.work upgrade

- P0-1: ProviderError type + ReportStatus for precise 401/403 detection
- P0-2: Remove -config flag from deploy/homeagent.service
- P2-1: 5s debounce on context.go Save()
- P2-2→C1: Delete output_set_channel entirely
- P2-3: Extract mediaDataURL/mediaChat helpers
- P2-4: Dedup defaultSources var
- P3: Delete dead packages (embed/tokenizer/container/snapshot)
- P3: Delete dead functions (messagesToMap, RunStageAll)
- CL: Update .gitignore, docs, Makefile, gojieba removal
- Config: Delete config/config.yaml, update docs
- Arch: Remove EmitOutputTo from emitResponse
- CL-1: go.work 1.19→1.21
- Docs: Add Mermaid architecture diagrams to README
- Docs: Add kernel-rebuild requires plugin-rebuild note to PLUGIN_DEV.md

internal/plugins/webui/handler.go

@@ -20,6 +20,7 @@ import (
 	internalConfig "gitcode.com/JianFeeeee/HomeAgent/internal/config"
 	"gitcode.com/JianFeeeee/HomeAgent/internal/events"
 	"gitcode.com/JianFeeeee/HomeAgent/internal/knowledge"
+	"gitcode.com/JianFeeeee/HomeAgent/internal/meta"
 	luaVM "gitcode.com/JianFeeeee/HomeAgent/internal/lua"
 	"gitcode.com/JianFeeeee/HomeAgent/internal/memory"
 	"gitcode.com/JianFeeeee/HomeAgent/internal/memory/text"
@@ -290,7 +291,7 @@ func (h *Handler) handleStatus(w http.ResponseWriter, r *http.Request) {
 		"status":    "running",
 		"uptime":    time.Since(h.startTime).String(),
 		"agents":    len(agents),
-		"version":   "0.1.0",
+		"version":   meta.Version,
 		"startedAt": h.startTime,
 	})
 }