Make the day's list a pull of committed work, not a push of everything unblocked

due_date had been carrying two incompatible meanings: "this has a real
deadline" (Bills, meds, a signup cutoff) and "this is when I intend to
work on it." Chains leaned entirely on the second -- every step was
stamped due_date = now the moment it unlocked -- so a five-minute call
and a six-month certification both arrived looking overdue, and the only
way to quiet them was to hand-reschedule. The list therefore always
contained work that could not be finished that day, which made ending a
day at zero impossible by construction rather than by effort.

Splits the two apart:
  - due_date keeps only its real meaning: an externally-imposed deadline.
  - committed_date (new, migration 031) means "I chose this for today."

Chain steps no longer get a due date on unlock (CreateChain, advanceChain,
and the delete-promotion path), and are excluded from the undated list so
they don't simply fall through to it instead. They reach the day only by
being committed, via a "+ today" control on the chain card. Bucket-active
items get the same control. BuildTimeline pulls in committed tasks,
deduped against tasks already present for a different reason (committed
and due-today are two reasons for one row, not two rows).

Migration 031 also clears the auto-stamped due dates from open chain
steps; completed steps keep theirs as historical record.

Two supporting changes made while in here:
  - Extracted the native_tasks SELECT list into nativeTaskColumns. It had
    been copy-pasted into nine queries that must each agree exactly with
    scanNativeTasks' field order; adding committed_date meant editing all
    nine correctly or silently breaking whichever was missed.
  - Extracted templateFuncMap() and added TestTemplates_AllParse. New()
    only logs a warning when template parsing fails, so a malformed
    template shipped silently and surfaced as a broken page at runtime.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018AwnALZL6bD4VBtATDVv3B

1 files changed, 46 insertions, 1 deletions

diff --git a/internal/store/native_tasks_test.go b/internal/store/native_tasks_test.go
index 9453c86..70b775e 100644
--- a/internal/store/native_tasks_test.go
+++ b/internal/store/native_tasks_test.go
@@ -50,7 +50,8 @@ func newNativeTasksTestStore(t *testing.T) *Store {
 			bucket_id TEXT DEFAULT '',
 			bucket_state TEXT DEFAULT '',
 			bucket_last_active_at DATETIME,
-			abandoned BOOLEAN DEFAULT 0
+			abandoned BOOLEAN DEFAULT 0,
+			committed_date DATE
 		)
 	`); err != nil {
 		t.Fatal(err)
@@ -798,3 +799,47 @@ func TestCompleteNativeTask_DoesNotAbandonAnything(t *testing.T) {
 		t.Errorf("abandoned = %d, want 0 -- a completed occurrence was done, not skipped", abandoned)
 	}
 }
+
+func TestSetTaskCommitted_RoundTrips(t *testing.T) {
+	s := newNativeTasksTestStore(t)
+
+	today := config.Now()
+	if err := s.SetTaskCommitted("real-1", today); err != nil {
+		t.Fatalf("SetTaskCommitted: %v", err)
+	}
+
+	committed, err := s.GetCommittedTasks(today)
+	if err != nil {
+		t.Fatalf("GetCommittedTasks: %v", err)
+	}
+	if len(committed) != 1 || committed[0].ID != "real-1" {
+		t.Fatalf("GetCommittedTasks = %v, want exactly real-1", committed)
+	}
+
+	// A different day must not pick it up.
+	other, err := s.GetCommittedTasks(today.AddDate(0, 0, 1))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(other) != 0 {
+		t.Errorf("tomorrow's committed list = %d task(s), want 0", len(other))
+	}
+
+	if err := s.ClearTaskCommitted("real-1"); err != nil {
+		t.Fatalf("ClearTaskCommitted: %v", err)
+	}
+	after, err := s.GetCommittedTasks(today)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(after) != 0 {
+		t.Errorf("after clearing, committed list = %d task(s), want 0", len(after))
+	}
+}
+
+func TestSetTaskCommitted_UnknownID_ReturnsErrNotFound(t *testing.T) {
+	s := newNativeTasksTestStore(t)
+	if err := s.SetTaskCommitted("nope", config.Now()); !errors.Is(err, ErrNativeTaskNotFound) {
+		t.Fatalf("err = %v, want ErrNativeTaskNotFound", err)
+	}
+}