clarify: a parked question belongs to the conversation that was asked (V-466)

The clarify store had one key for the whole daemon, so a question asked in
the web chat and never answered captured the next three utterances from any
source — telegram, or the mic — and answered them against a request the
speaker never made.

The reach now supplies a conversation id on the IPC Chat call, and the
daemon carries it on the context the way it already carries the correlation
id, so the six clarify call sites read it instead of a constant. The mic has
no id of its own and keeps the key it had, so voice behaves exactly as
before. mavweb has no per-browser session, so every tab is one conversation:
right for a single-owner box, and still distinct from telegram and the mic.

Dialogue sessions stay global on purpose — they are what she remembers about
him, not what she is waiting for from one channel.

internal/auth/auth_test.go

@@ -311,7 +311,7 @@ func TestGate_IpcServer_CheckWiredThroughSocket(t *testing.T) {
 	if fake.writes != 0 {
 		t.Errorf("auth refused but CoreAPI was called %d time(s); refused calls must not reach CoreAPI", fake.writes)
 	}
-	_, err = cli.Chat(context.Background(), "привет")
+	_, err = cli.Chat(context.Background(), "web", "привет")
 	if !errors.Is(err, ipc.ErrForbidden) {
 		t.Errorf("wire: chat from unenrolled uid = %v; want ipc.ErrForbidden", err)
 	}
@@ -344,7 +344,7 @@ func TestGate_IpcServer_ChatAllowedForEnrolledCaller(t *testing.T) {
 		t.Fatalf("dial: %v", err)
 	}
 	t.Cleanup(func() { _ = cli.Close() })
-	reply, err := cli.Chat(context.Background(), "привет")
+	reply, err := cli.Chat(context.Background(), "web", "привет")
 	if err != nil {
 		t.Fatalf("Chat: %v", err)
 	}
@@ -373,7 +373,7 @@ func (r *recordingAPI) WriteFact(_ context.Context, _ ipc.WriteFactReq) (int64,
 	return int64(r.writes), nil
 }
 
-func (r *recordingAPI) Chat(_ context.Context, text string) (string, error) {
+func (r *recordingAPI) Chat(_ context.Context, _, text string) (string, error) {
 	r.chats++
 	return "echo: " + text, nil
 }

internal/ipc/api.go

@@ -593,8 +593,14 @@ type MCPServerStatus struct {
 }
 
 // chatReq / chatResp — text chat round-trip for the IPC Chat method.
+//
+// Conversation names the thread this utterance belongs to: a mavweb session, a
+// telegram chat. It is opaque to the daemon and only has to be stable for one
+// conversation and distinct across them. Empty is allowed and means "the
+// unattributed text tap", which is what an old client sends.
 type chatReq struct {
-	Text string `json:"text"`
+	Text         string `json:"text"`
+	Conversation string `json:"conversation,omitempty"`
 }
 type chatResp struct {
 	Reply string `json:"reply"`
@@ -759,7 +765,12 @@ type CoreAPI interface {
 	// Chat routes a text utterance through the reactive handler's core path
 	// (router → dialogue → action → replier) and returns the reply text.
 	// No audio or stt/tts — for text channels (mavweb, telegram).
-	Chat(ctx context.Context, text string) (string, error)
+	//
+	// conversation names the thread. A parked clarifying question is held per
+	// conversation, so an unanswered question on one reach cannot eat the next
+	// utterance from another (Vikunja #466). Empty means the unattributed text
+	// tap and is still one conversation of its own, separate from the mic.
+	Chat(ctx context.Context, conversation, text string) (string, error)
 
 	// RecentEvents returns the daemon's unified intake journal, newest first
 	// (Vikunja #283) — one envelope per thing that arrived, whatever direction

internal/ipc/client.go

@@ -623,9 +623,9 @@ func (c *Client) AcceptProposedRoutine(ctx context.Context, id int64) error {
 	return c.call(ctx, MethodAcceptProposedRoutine, acceptProposedRoutineReq{ID: id}, nil)
 }
 
-func (c *Client) Chat(ctx context.Context, text string) (string, error) {
+func (c *Client) Chat(ctx context.Context, conversation, text string) (string, error) {
 	var r chatResp
-	if err := c.call(ctx, MethodChat, chatReq{Text: text}, &r); err != nil {
+	if err := c.call(ctx, MethodChat, chatReq{Text: text, Conversation: conversation}, &r); err != nil {
 		return "", err
 	}
 	return r.Reply, nil

internal/ipc/ipc_test.go

@@ -401,7 +401,7 @@ func TestChatViaClient(t *testing.T) {
 	}
 	t.Cleanup(func() { _ = cli.Close() })
 
-	reply, err := cli.Chat(context.Background(), "привет")
+	reply, err := cli.Chat(context.Background(), "web", "привет")
 	if err != nil {
 		t.Fatalf("Chat: %v", err)
 	}
@@ -417,7 +417,7 @@ type chatTestAPI struct {
 	UnimplementedCoreAPI
 }
 
-func (a *chatTestAPI) Chat(ctx context.Context, text string) (string, error) {
+func (a *chatTestAPI) Chat(ctx context.Context, _, text string) (string, error) {
 	if text == "привет" {
 		return "и тебе привет!", nil
 	}

internal/ipc/server.go

@@ -240,7 +240,7 @@ func (a *storeAPI) RevertFact(ctx context.Context, key string) (int64, error) {
 	return newID, mapErr(err)
 }
 
-func (a *storeAPI) Chat(ctx context.Context, text string) (string, error) {
+func (a *storeAPI) Chat(ctx context.Context, conversation, text string) (string, error) {
 	return "", errors.New("store: chat not available via direct store API")
 }
 
@@ -974,7 +974,7 @@ var methodTable = map[Method]handlerFunc{
 		return map[string]int64{"new_id": newID}, nil
 	}),
 	MethodChat: withParams(func(ctx context.Context, api CoreAPI, p chatReq) (chatResp, error) {
-		reply, err := api.Chat(ctx, p.Text)
+		reply, err := api.Chat(ctx, p.Conversation, p.Text)
 		return chatResp{Reply: reply}, err
 	}),
 	MethodTickTrace: withoutParams(func(ctx context.Context, api CoreAPI) (TickTrace, error) {

internal/ipc/unimplemented.go

@@ -141,6 +141,6 @@ func (UnimplementedCoreAPI) MCPServers(ctx context.Context) ([]MCPServerStatus,
 func (UnimplementedCoreAPI) DayPlan(ctx context.Context) (DayPlan, error) {
 	return DayPlan{}, ErrNotImplemented
 }
-func (UnimplementedCoreAPI) Chat(ctx context.Context, text string) (string, error) {
+func (UnimplementedCoreAPI) Chat(ctx context.Context, conversation, text string) (string, error) {
 	return "", ErrNotImplemented
 }