Announce the group exhibition at Podium

Opens 21 October 2026, runs a month. Uses portal's event: window so
it rides in the header while it runs.

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

.gitea/workflows/deploy.yml

@@ -18,7 +18,7 @@ on:
       - .gitea/workflows/deploy.yml
 
 env:
-  PORTAL_RELEASE: v0.3.4
+  PORTAL_RELEASE: v0.3.6
   INSTANCE: redoal-portal
 
 jobs:
@@ -83,9 +83,16 @@ jobs:
       # No sudo: the runner's unit sets NoNewPrivileges=yes - systemctl
       # talks to PID1 over D-Bus, authorized by the polkit rule scoped
       # to deploy-runner + the app@* unit pattern.
+      # enable: the unit must come back after a host reboot (2026-08-30 a
+      # reboot left both portal instances down - deploys had only ever
+      # started them). Needs the manage-unit-files polkit grant; until
+      # that's on the host the enable is reported and skipped, never a
+      # failed deploy.
       - name: Activate and restart
         run: |
           ln -sfn "/srv/app/$INSTANCE/releases/$PORTAL_RELEASE" /srv/app/$INSTANCE/current
+          systemctl enable app@$INSTANCE.service \
+            || echo "::warning::could not enable app@$INSTANCE (polkit) - unit will not survive a reboot"
           systemctl restart app@$INSTANCE.service
 
       # www redirects to the apex for the same single-cookie-scope

paths.js

@@ -72,48 +72,96 @@ export function turningFunctionToPoints(turning, samples = 14) {
     return pts;
 }
 
+// A path plus the motion that is its own: where it sits, how it
+// spins, how it drifts, how fast it traces itself in. Every rate is
+// an integer number of cycles so the field loops seamlessly at t = 1.
 export function makePaths(seed, count, stops = 10) {
     const rand = mulberry32(seed);
     const paths = [];
     for (let i = 0; i < count; i++) {
-        paths.push(turningFunctionToPoints(createTurningFunction(rand, stops)));
+        const pts = turningFunctionToPoints(createTurningFunction(rand, stops));
+        let cx = 0, cy = 0;
+        for (let k = 0; k < pts.length; k += 2) { cx += pts[k]; cy += pts[k + 1]; }
+        cx /= pts.length / 2;
+        cy /= pts.length / 2;
+        const sign = rand() > 0.5 ? 1 : -1;
+        paths.push({
+            pts,
+            cx,
+            cy,
+            // own turns per cycle: a third sit still, the rest turn one
+            // or two full turns either way over the cycle
+            spin: rand() < 0.33 ? 0 : sign * (1 + Math.floor(rand() * 2)),
+            // slow orbit around its own place, radius in frame units
+            driftR: 0.01 + rand() * 0.03,
+            driftK: 1 + Math.floor(rand() * 3),
+            driftPhase: rand() * Math.PI * 2,
+            // its own wave along the line
+            waveF: 4 + rand() * 6,
+            waveK: 1 + Math.floor(rand() * 2),
+            waveA: 0.004 + rand() * 0.008,
+            // tracing tempo: how many times it redraws itself per cycle
+            tempo: 1 + Math.floor(rand() * 2),
+            phase: rand(),
+        });
     }
     return paths;
 }
 
-// t in [0, 1) is the animation phase. Each path traces itself in over
-// one cycle, offset by its index so the field is always mid-draw, and
-// fades as it completes; the whole field drifts slowly and a soft
-// wave runs through every line. `colors` is [accent, dim] - the
-// palette comes from the page's own custom properties either way.
+// t in [0, 1) is the animation phase. Each path traces itself in at
+// its own tempo and phase, fades as it completes, turns at its own
+// rate about its own center and drifts on its own small orbit; a wave
+// with its own frequency runs along it. The tip is interpolated
+// between samples so a trace glides instead of stepping. `colors` is
+// [accent, dim] - the palette comes from the page's custom properties.
+const smooth = (u) => u * u * (3 - 2 * u);
+
 export function drawPaths(ctx, width, height, paths, t, colors) {
     ctx.clearRect(0, 0, width, height);
     const s = Math.min(width, height) * 0.9;
     ctx.save();
     ctx.translate(width / 2, height / 2);
-    ctx.rotate(t * Math.PI * 2 * 0.08);
     ctx.lineWidth = 1;
     ctx.lineCap = 'round';
     ctx.lineJoin = 'round';
-    const n = paths.length;
-    const wave = t * Math.PI * 2;
-    for (let i = 0; i < n; i++) {
-        const pts = paths[i];
-        const phase = (t + i / n) % 1;
-        // ease: quick to appear, long to complete
-        const progress = Math.min(1, phase * 1.35);
-        const count = Math.max(2, Math.floor((pts.length / 2) * progress));
+    const TAU = Math.PI * 2;
+    for (let i = 0; i < paths.length; i++) {
+        const p = paths[i];
+        const phase = (t * p.tempo + p.phase) % 1;
+        // ease: quick to appear, long to complete, then fade
+        const progress = smooth(Math.min(1, phase * 1.35));
         const alpha = phase < 0.85 ? 0.75 : 0.75 * (1 - (phase - 0.85) / 0.15);
+        const total = p.pts.length / 2;
+        const tip = 1 + (total - 1) * progress; // fractional sample index
+        const whole = Math.floor(tip);
+        const frac = tip - whole;
+
+        const angle = p.spin * TAU * t;
+        const dx = Math.cos(p.driftPhase + p.driftK * TAU * t) * p.driftR;
+        const dy = Math.sin(p.driftPhase + p.driftK * TAU * t) * p.driftR;
+        const wave = p.waveK * TAU * t;
+
+        ctx.save();
+        ctx.translate((p.cx + dx) * s, (p.cy + dy) * s);
+        ctx.rotate(angle);
         ctx.strokeStyle = i % 3 === 0 ? colors[0] : colors[1];
         ctx.globalAlpha = alpha * (i % 3 === 0 ? 1 : 0.55);
         ctx.beginPath();
-        for (let k = 0; k < count; k++) {
-            const x = pts[k * 2], y = pts[k * 2 + 1];
-            const wy = y + Math.sin(x * 7 + wave + i) * 0.008;
-            if (k === 0) ctx.moveTo(x * s, wy * s);
-            else ctx.lineTo(x * s, wy * s);
+        const at = (k) => {
+            const x = p.pts[k * 2] - p.cx, y = p.pts[k * 2 + 1] - p.cy;
+            return [x, y + Math.sin(x * p.waveF + wave) * p.waveA];
+        };
+        for (let k = 0; k <= Math.min(whole, total - 1); k++) {
+            const [x, y] = at(k);
+            if (k === 0) ctx.moveTo(x * s, y * s);
+            else ctx.lineTo(x * s, y * s);
+        }
+        if (whole < total - 1 && frac > 0) {
+            const [ax, ay] = at(whole), [bx, by] = at(whole + 1);
+            ctx.lineTo((ax + (bx - ax) * frac) * s, (ay + (by - ay) * frac) * s);
         }
         ctx.stroke();
+        ctx.restore();
     }
     ctx.restore();
 }

questions/exhibition.yaml

@@ -0,0 +1,37 @@
+# The group exhibition at Podium, connected to the conference: opens
+# 21 October 2026 and runs for a month. Announced in every header
+# while it runs (portal's event: window); afterwards a followup, and
+# a "post what happened" task lands on /review.
+name: Where can you see it in person?
+description: >
+  redoal is part of the group exhibition at Podium, opening 21 October
+  and running for a month alongside the conference. Draw on the
+  screens, leave a voice at a shape, hear who came before you.
+event:
+  starts: 2026-10-21T18:00:00+02:00
+  duration: 31d
+  place: Podium, Oslo
+alternatives:
+  - name: Come draw on the wall
+    description: >
+      The installation runs the same code as this site, on screens
+      you can stand in front of together — the network at the scale
+      of a room.
+    features:
+      - name: Opening 21 October
+        description: >
+          The exhibition opens on the 21st and stays up for a month,
+          within the conference programme. Come to the opening, or
+          any day after.
+        icon: lucide:calendar-days
+      - name: Draw, then listen
+        description: >
+          Draw a shape on the touch screen and arrive at a place.
+          Listen to the voices left there, add your own, and watch
+          your line find the lines drawn before it.
+        icon: lucide:hand
+      - name: Take the zine with you
+        description: >
+          The printed zine sits in the room — six short pieces on what
+          a network like this could mean. Fold one, hand it on.
+        icon: lucide:book-open

questions/review/index.yaml

@@ -37,3 +37,26 @@ alternatives:
           transitions:
             - to: unsubscribed
               label: Unsubscribe
+
+  - name: Announced pages
+    description: >
+      Pages with an `event:` window, kept here by portal itself. When a
+      window closes the record becomes a task: post what happened,
+      then mark it done.
+    action: /review
+    consequence: [Confirm]
+    features:
+      - name: ""
+        description: ""
+        resource:
+          source:
+            kind: kv
+            bucket: portal_events
+          requires_group: owners
+          transitions:
+            - from: awaiting_summary
+              to: summarized
+              label: Posted what happened
+            - from: announced
+              to: summarized
+              label: Needs no summary