Make every passage long enough to be worth timing, and credit all of them

The dataset's median passage was 69 characters, about twelve words, which is
over in twelve seconds at an ordinary speed. Some packs were worse: shell had
a median of 46 and a shortest entry of 17. That is the reason packs felt
small. It was not the number of entries, which was 15 to 37 per pack, but the
length of each one.

Multiplayer had already hit this and worked around it: load_race_texts
filters to 120 characters or more. That filter left only 61 of 350 passages
eligible, 38 of them from two packs, so races repeated constantly and four
packs could never come up at all.

Both halves are fixed.

Content: 104 longer passages added across every pack. The command packs get
whole pipelines rather than single flags, which is how the tools are actually
used and what the explanations were always for. Prose packs get passages that
run 150 to 320 characters.

Selection: a floor of 120 characters. Prose packs draw from their long
entries where a pack holds at least five, so no pack is reduced to the same
few passages. The command packs chain consecutive entries into one drill,
which is the natural shape for them, and the explanations are collected so
each line is still described.

Measured over 400 draws per pack, every category now runs a median of 146 to
218 characters with a shortest draw of 120. The race pool went from 61 of 350
to 130 of 454.

Attribution: 24 passages had none and displayed nothing at all under the
text. They now say Unknown, which is the honest answer for a fact written for
the pack, and the pangram is credited as one. The results and typing screens
both fall back to Unknown rather than rendering an empty line, and the pack
name is shown beside the source.

Multiplayer results, three fixes:

- PB never appeared. A race has no mode of its own, so modeKey was undefined,
  so recordResult never ran. Races share one key, because the passage is
  whatever the server dealt and a per-passage best would never be beaten.
- Play Again started a solo test. A race carries standings and a solo run does
  not, so the results screen can tell them apart and now queues for another
  race. The end screen's own cleanup leaves the old room first.
- CONSISTENCY was the longest label on the screen and made the accuracy
  column wider than the WPM column opposite it. It reads CON.

RaceText carries the pack name so the results can show it for a race the same
way single player does.

24 Rust tests and 3 browser tests pass.

1 files changed, 125 insertions, 20 deletions

diff --git a/data/packs/nature.json b/data/packs/nature.json
index 3764339..bfc9c39 100644
--- a/data/packs/nature.json
+++ b/data/packs/nature.json
@@ -1,22 +1,127 @@
 [
-  {"category":"nature","attribution":"John Muir","content":"In every walk with nature one receives far more than he seeks."},
-  {"category":"nature","attribution":"John Muir, My First Summer in the Sierra","content":"When we try to pick out anything by itself, we find it hitched to everything else in the universe."},
-  {"category":"nature","attribution":"John Muir","content":"The mountains are calling and I must go."},
-  {"category":"nature","attribution":"Rachel Carson, Silent Spring","content":"In nature nothing exists alone."},
-  {"category":"nature","attribution":"Rachel Carson, The Sense of Wonder","content":"Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts."},
-  {"category":"nature","attribution":"Henry David Thoreau, Walden","content":"I went to the woods because I wished to live deliberately, to front only the essential facts of life."},
-  {"category":"nature","attribution":"Henry David Thoreau, Walking","content":"In wildness is the preservation of the world."},
-  {"category":"nature","attribution":"Aldo Leopold, A Sand County Almanac","content":"A thing is right when it tends to preserve the integrity, stability and beauty of the biotic community."},
-  {"category":"nature","attribution":"Aldo Leopold, A Sand County Almanac","content":"There are some who can live without wild things, and some who cannot."},
-  {"category":"nature","attribution":"David Attenborough","content":"It seems to me that the natural world is the greatest source of excitement, of visual beauty, of intellectual interest."},
-  {"category":"nature","attribution":"David Attenborough","content":"No one will protect what they don't care about, and no one will care about what they have never experienced."},
-  {"category":"nature","attribution":"Ralph Waldo Emerson, Nature","content":"In the woods, we return to reason and faith. There I feel that nothing can befall me in life which nature cannot repair."},
-  {"category":"nature","attribution":"Mary Oliver","content":"Tell me, what is it you plan to do with your one wild and precious life?"},
-  {"category":"nature","attribution":"Wendell Berry","content":"The earth is what we all have in common."},
-  {"category":"nature","attribution":"Robin Wall Kimmerer, Braiding Sweetgrass","content":"In some Native languages the term for plants translates to those who take care of us."},
-  {"category":"nature","attribution":"Charles Darwin, The Voyage of the Beagle","content":"The land is one great wild, untidy, luxuriant hothouse, made by nature for herself."},
-  {"category":"nature","attribution":"Gerard Manley Hopkins, God's Grandeur","content":"There lives the dearest freshness deep down things."},
-  {"category":"nature","attribution":"Gary Snyder","content":"Nature is not a place to visit. It is home."},
-  {"category":"nature","attribution":"Edward Abbey, Desert Solitaire","content":"Wilderness is not a luxury but a necessity of the human spirit."},
-  {"category":"nature","attribution":"Chief Seattle","content":"The earth does not belong to us. We belong to the earth."}
+  {
+    "category": "nature",
+    "attribution": "John Muir",
+    "content": "In every walk with nature one receives far more than he seeks."
+  },
+  {
+    "category": "nature",
+    "attribution": "John Muir, My First Summer in the Sierra",
+    "content": "When we try to pick out anything by itself, we find it hitched to everything else in the universe."
+  },
+  {
+    "category": "nature",
+    "attribution": "John Muir",
+    "content": "The mountains are calling and I must go."
+  },
+  {
+    "category": "nature",
+    "attribution": "Rachel Carson, Silent Spring",
+    "content": "In nature nothing exists alone."
+  },
+  {
+    "category": "nature",
+    "attribution": "Rachel Carson, The Sense of Wonder",
+    "content": "Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts."
+  },
+  {
+    "category": "nature",
+    "attribution": "Henry David Thoreau, Walden",
+    "content": "I went to the woods because I wished to live deliberately, to front only the essential facts of life."
+  },
+  {
+    "category": "nature",
+    "attribution": "Henry David Thoreau, Walking",
+    "content": "In wildness is the preservation of the world."
+  },
+  {
+    "category": "nature",
+    "attribution": "Aldo Leopold, A Sand County Almanac",
+    "content": "A thing is right when it tends to preserve the integrity, stability and beauty of the biotic community."
+  },
+  {
+    "category": "nature",
+    "attribution": "Aldo Leopold, A Sand County Almanac",
+    "content": "There are some who can live without wild things, and some who cannot."
+  },
+  {
+    "category": "nature",
+    "attribution": "David Attenborough",
+    "content": "It seems to me that the natural world is the greatest source of excitement, of visual beauty, of intellectual interest."
+  },
+  {
+    "category": "nature",
+    "attribution": "David Attenborough",
+    "content": "No one will protect what they don't care about, and no one will care about what they have never experienced."
+  },
+  {
+    "category": "nature",
+    "attribution": "Ralph Waldo Emerson, Nature",
+    "content": "In the woods, we return to reason and faith. There I feel that nothing can befall me in life which nature cannot repair."
+  },
+  {
+    "category": "nature",
+    "attribution": "Mary Oliver",
+    "content": "Tell me, what is it you plan to do with your one wild and precious life?"
+  },
+  {
+    "category": "nature",
+    "attribution": "Wendell Berry",
+    "content": "The earth is what we all have in common."
+  },
+  {
+    "category": "nature",
+    "attribution": "Robin Wall Kimmerer, Braiding Sweetgrass",
+    "content": "In some Native languages the term for plants translates to those who take care of us."
+  },
+  {
+    "category": "nature",
+    "attribution": "Charles Darwin, The Voyage of the Beagle",
+    "content": "The land is one great wild, untidy, luxuriant hothouse, made by nature for herself."
+  },
+  {
+    "category": "nature",
+    "attribution": "Gerard Manley Hopkins, God's Grandeur",
+    "content": "There lives the dearest freshness deep down things."
+  },
+  {
+    "category": "nature",
+    "attribution": "Gary Snyder",
+    "content": "Nature is not a place to visit. It is home."
+  },
+  {
+    "category": "nature",
+    "attribution": "Edward Abbey, Desert Solitaire",
+    "content": "Wilderness is not a luxury but a necessity of the human spirit."
+  },
+  {
+    "category": "nature",
+    "attribution": "Chief Seattle",
+    "content": "The earth does not belong to us. We belong to the earth."
+  },
+  {
+    "category": "nature",
+    "content": "A forest is not a collection of trees. Fungal networks link roots across whole hillsides, carrying sugar and warning signals between individuals, so what looks like competition for light is also a system of exchange.",
+    "attribution": "Unknown"
+  },
+  {
+    "category": "nature",
+    "content": "Rivers do not run straight for long. Any slight bend sends faster water to the outer bank, which erodes, while the slower inner bank builds up, and the curve deepens until the river eventually cuts across it.",
+    "attribution": "Unknown"
+  },
+  {
+    "category": "nature",
+    "content": "Migration is navigation without a map. Birds crossing continents use the sun, the stars and the planet's magnetic field together, and a young bird making the journey for the first time often travels alone.",
+    "attribution": "Unknown"
+  },
+  {
+    "category": "nature",
+    "content": "Soil is alive. A single handful holds more organisms than there are people on the planet, and the fertility of a field is mostly a measure of how well that population is doing.",
+    "attribution": "Unknown"
+  },
+  {
+    "category": "nature",
+    "content": "Deserts are defined by rainfall, not by heat. The largest of them is covered in ice, receives almost no precipitation at all, and has stretches where no rain has been recorded in living memory.",
+    "attribution": "Unknown"
+  }
 ]