Dedup Garmin data storage, configurable chart colors, taxonomy fixes, sync/progression fixes

- Remove duplicated Garmin fields from storage; decode display-only fields
  (activity name/type, lap duration/HR, structured workout raw JSON) from
  RawJSON at API-response time instead of storing redundant columns
- Add a fully configurable chart color system (pace/HR main-line colors, 4
  effort-kind colors, tint/darken/brighten intensity knobs) under Profile >
  Chart colors
- Rename training types and fix their display order (Easy, Long, 60'/30'
  Threshold, Tempo, Intervals, MAS Test, Race) everywhere they're listed
- Add an Efficiency Factor progression metric; fix Progression chart axes to
  use tight non-zero-based domains, m:ss/km pace formatting, and rounded
  ticks instead of raw floating-point labels
- Expose the raw get_workout_by_id() payload in the raw-data viewer
  alongside activity/lap/detail JSON; enlarge the modal and shrink array
  indentation for readability
- Fix "last sync" reporting a meaningless activity count: record one
  combined sync run per manual "Sync now" and count genuinely new
  activities instead of re-listing whatever Garmin returned for the queried
  window
- Let a Review Queue activity be manually cleared back to Unclassified, and
  make "Reset all" available even while disconnected from Garmin

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/pages/Dashboard.tsx

@@ -9,6 +9,7 @@ const METRICS: { key: ProgressionMetric; label: string }[] = [
   { key: "vo2max", label: "VO2max" },
   { key: "aerobic_te", label: "Aerobic Training Effect" },
   { key: "anaerobic_te", label: "Anaerobic Training Effect" },
+  { key: "efficiency_factor", label: "Efficiency Factor" },
 ];
 
 export function Dashboard() {
@@ -42,17 +43,16 @@ export function Dashboard() {
 
   return (
     <div className="page">
-      <h2>Progression</h2>
-
       {kinds.length === 0 ? (
         <p className="empty-state">
-          No workout kinds defined yet. Create one on the Workout Kinds tab to start seeing progression here.
+          No training types defined yet. See the Training types card on the Profile page to start seeing progression
+          here.
         </p>
       ) : (
         <>
           <div className="controls">
             <label>
-              Workout kind
+              Training types
               <select
                 value={selectedKindId ?? ""}
                 onChange={(e) => setSelectedKindId(Number(e.target.value))}