Rebuild the left column, and put the map's controls on the map

[khagele]

Four issues, four commits, in the order they can be reviewed. Everything here came out of measuring a real run — 8 first-hop prefixes near Delft, cluster locked, commit 3885428 — rather than from reading the markup.

The starting numbers: the left column was 2145px beside a 792px map, Step 2 alone was 1587px, and the card holding the map's own controls sat at y=1852, 973px below the bottom of the map. On a phone the map started at y=2297 of a 2776px page.

1 · Step 1 had four text roles in one voice (#132)

Role	Size	Colour
Field label	13.44px	rgb(158,182,192)
Explanation under it	12.48px, opacity .85	rgb(158,182,192)
Incident toggle	13.44px	rgb(158,182,192)
km unit label	13.44px	rgb(158,182,192)

The hierarchy was also inverted: p.hint had no colour of its own, inherited --text at .85 opacity, and rendered brighter than the --muted label above it.

Now three roles, three treatments: the label leads, a new .field-help carries the static explanation in a quieter --faint and is never overwritten, and p.hint becomes the app's reply channel — monospaced with an accent rule, so "Parsed observers: …" can no longer be read as the next field's opening words.

Two bugs fell out of it: no rule styled a inside the panels, so links rendered in the browser default #0000EE on a dark teal card; and `PREFIX` or `PREFIX:count` shipped with literal backticks as UI text.

2 · Two ways into Step 1 (#133)

The spam-detector importer is the other way to start, not a footnote — it was a <details> above the main field, so the exception route opened the panel. It is now a segmented control, and loading an incident fills the prefix field, switches back to it, and says where the values came from.

Second-hop prefixes fold away by default, with 2nd-hop km travelling with them since it governs nothing else. A deep link carrying second-hop clues opens the fold, so a shared scene never hides part of itself.

3 · Observer rows, and a number that was missing (#134)

Rows spent three lines on 51.99951, 4.39375 — one-metre precision in a list where you choose between candidates kilometres apart — and never showed distance to the cluster centre, which is the figure dedupeByPrefix() actually falls back to when proven links do not separate a prefix (#54).

Rows now read centre 0.1 km · reach 4.3 km, with the exclusion reason as a tag beside the name. Distance is computed at render, so dragging an observer (#33b) moves it too. Coordinates stay in the map popup.

Chasing the row height found the real cause: .step-panel input (0,1,1) outspecified .observer-weight (0,1,0), so the weight field kept the panel's 12px padding and stood 48px tall while its own text was 30px. The field, not the content, set the 60px row.

The cluster status concatenated six caveats into one paragraph. Same six facts, one per line, count first; nothing dropped, per AGENTS.md. The two that are inference rather than measurement take the second accent (#54, #85).

4 · The map's controls, and folding steps (#135)

The strip moves into .map-col above .map-wrap: with the map, never over it, so there is no overlay against a light basemap and no z-index to maintain. Relief is a chip opening a popover, which keeps the strip one line at its widest. ? and 🔔 go to the topbar.

Step panels get a clickable head with a summary, so a folded step reads Step 1 · 8 prefixes and can be reopened — Step 1 already folded itself when a cluster locked, with no way back and nothing said. On a narrow screen Step 2 folds once an estimate exists. An automatic fold never fires on a panel opened by hand.

Result

	before	after
Left column, desktop	2145px	1726px
Observer row	60px	42px
Observer list	949px	711px
Map controls	973px below the map	above it
Phone: map starts at	y=2297	y=742
Phone: page height	2776px	1221px

Verified

Driven against the running page at 1440×900 and 375×812: full discovery → lock → estimate, both entry tabs, a real incident import (#2148, 8 entry hops), deep links with and without second-hop prefixes, the relief popover, folding by hand and automatically, and that a hand-opened panel stays open through a second estimate.

One bug was introduced and caught here: removing the concatenated notes in commit 3 left a reference to hullNote, which threw when activating a cluster. Fixed in commit 4 and re-verified with a full run.

Changelog entry per commit, per AGENTS.md §7.

Closes #132
Closes #133
Closes #134
Closes #135

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