docs: fix all internal cross-references after restructure

docs/superpowers/specs/2026-06-19-stats-redesign.md

@@ -29,7 +29,7 @@ The existing 4-stat grid expands to 6 stats. Both `stats.html.twig` and the inli
 
 | Stat | Label | Source | Notes |
 |---|---|---|---|
-| Days on the road | `days on the road` | `(now - first entry date) / 86400` | Unchanged |
+| Days on the road | `days on the road` | `date_end - date_start` if trip `date_end` is set; else `now - first entry date` | Fixed for past trips |
 | Entries posted | `entries posted` | `all_entries\|length` | Unchanged |
 | Countries visited | `countries visited` | Deduplicated `location_country` | Unchanged; country list shown below grid |
 | **Cities visited** | `cities visited` | Deduplicated `location_city` | New; same dedup logic as countries |
@@ -82,19 +82,10 @@ Max speed is explicitly excluded — GPS noise at 1-second resolution produces u
 
 ### Icon system
 
-The GPX `<type>` tag on the track element drives the icon shown in both the main stats distance block and the cycling panel header:
+A single static racing/gravel bike icon is used whenever GPX files are present — both in the main stats distance block and the cycling panel header. No dynamic switching based on `<type>`.
 
-| `<type>` value | Icon |
-|---|---|
-| `racebike` | Road bike |
-| `touringbicycle` | Touring bike |
-| `mtb` | Mountain bike |
-| `cycling` (generic) | Generic bike |
-| `hiking` | Hiking boot |
-| `hike` | Hiking boot |
-| Any unrecognised value | Generic bike (fallback) |
-
-When multiple GPX files exist with different types, use the type from the first file. This is an acceptable heuristic for now.
+Known Komoot `<type>` values for reference (future use if icon switching is ever added):
+`racebike`, `touringbicycle`, `mtb`, `cycling`, `hiking`, `hike`
 
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