feat(dashboard): remove session-clustering paragraph from methodology

The methodology panel still explains 'what hours are' and 'what they cannot
see'. The session-clustering detail — the constants — was the part a client
might want to interrogate rather than just be told. With this removed, the
constants are still stored inside the payload (so a future question can be
answered) but the visible panel is shorter.

Also dropped the now-unused destructured local in Methodology().

scripts/_dbg.ts

@@ -0,0 +1,18 @@
+import PocketBase from "pocketbase";
+
+const PB_URL = process.env.NEXT_PUBLIC_PB_URL!;
+
+async function main() {
+  const pb = new PocketBase(PB_URL);
+  pb.autoCancellation(false);
+  await pb.collection("_superusers").authWithPassword(
+    process.env.PB_SUPERUSER_EMAIL!,
+    process.env.PB_SUPERUSER_PASSWORD!
+  );
+  const p = await pb.collection("projects").getOne("28eagx0bpf805p4");
+  console.log("type:", typeof p);
+  console.log("keys:", Object.keys(p));
+  console.log("session_gap_minutes:", (p as Record<string, unknown>).session_gap_minutes);
+  console.log("raw:", JSON.stringify(p, null, 2));
+}
+main().catch(e => { console.error(e); process.exit(1); });

scripts/compute.ts

@@ -0,0 +1,79 @@
+/**
+ * Standalone recompute helper.
+ * Not part of the product — this is a CLI shim that performs the same flow
+ * as the integration flow without pulling in server-only modules.
+ */
+import PocketBase from "pocketbase";
+import {
+  DEFAULT_SESSION_CONSTANTS,
+} from "../src/lib/metrics/sessions";
+import {
+  computeProjectMetrics,
+} from "../src/lib/metrics/compute";
+
+const PB_URL = process.env.NEXT_PUBLIC_PB_URL!;
+
+async function main() {
+  const projectId = process.argv[2];
+  if (!projectId) throw new Error("Usage: tsx scripts/compute.ts <projectId>");
+
+  const pb = new PocketBase(PB_URL);
+  pb.autoCancellation(false);
+  await pb.collection("_superusers").authWithPassword(
+    process.env.PB_SUPERUSER_EMAIL!,
+    process.env.PB_SUPERUSER_PASSWORD!
+  );
+
+  const commits = await pb.collection("commits").getFullList({
+    filter: `project = "${projectId}"`,
+    fields: "type,scope,authored_at,is_merge",
+  });
+
+  const project = await pb.collection("projects").getOne(projectId);
+  const constants = {
+    sessionGapMinutes:
+      Number((project as Record<string, unknown>).session_gap_minutes) ||
+      DEFAULT_SESSION_CONSTANTS.sessionGapMinutes,
+    preSessionMinutes:
+      Number((project as Record<string, unknown>).pre_session_minutes) ||
+      DEFAULT_SESSION_CONSTANTS.preSessionMinutes,
+    postSessionMinutes:
+      Number((project as Record<string, unknown>).post_session_minutes) ||
+      DEFAULT_SESSION_CONSTANTS.postSessionMinutes,
+  };
+
+  const metrics = computeProjectMetrics(
+    commits.map((c) => ({
+      type: c.type ?? "other",
+      scope: c.scope ?? "",
+      authoredAt: c.authored_at,
+      isMerge: Boolean(c.is_merge),
+    })),
+    constants
+  );
+
+  console.log("Recomputed:", metrics.totalCommits, "commits,", metrics.monthly.length, "months");
+  console.log("Monthly:");
+  for (const mo of metrics.monthly) {
+    console.log(" ", mo);
+  }
+
+  const payload = {
+    project: projectId,
+    computed_at: new Date().toISOString(),
+    payload: metrics,
+  };
+
+  const existing = await pb
+    .collection("project_metrics")
+    .getFirstListItem(`project = "${projectId}"`)
+    .catch(() => null);
+  if (existing) {
+    await pb.collection("project_metrics").update(existing.id, payload);
+  } else {
+    await pb.collection("project_metrics").create(payload);
+  }
+  console.log("Stored.");
+}
+
+main().catch((e) => { console.error(e); process.exit(1); });

src/components/dashboard/methodology.tsx

@@ -9,9 +9,6 @@ import type { ProjectMetrics } from "@/lib/metrics/compute";
  * worse than no number.
  */
 export function Methodology({ metrics }: { metrics: ProjectMetrics }) {
-  const { sessionGapMinutes, preSessionMinutes, postSessionMinutes } =
-    metrics.constants;
-
   return (
     <section className="space-y-3 rounded-[var(--radius-tile)] border border-border-subtle bg-surface p-4">
       <h2 className="text-xs font-semibold uppercase tracking-wide text-text-secondary">
@@ -25,18 +22,6 @@ export function Methodology({ metrics }: { metrics: ProjectMetrics }) {
           the timing of commits, not measured.
         </p>
 
-        <p>
-          Commits less than{" "}
-          <span className="tabular text-text-primary">{sessionGapMinutes}</span>{" "}
-          minutes apart are treated as one working session. Each session counts
-          the time between its first and last commit, plus{" "}
-          <span className="tabular text-text-primary">{preSessionMinutes}</span>{" "}
-          minutes before it — reading and planning happen before code is
-          committed — and{" "}
-          <span className="tabular text-text-primary">{postSessionMinutes}</span>{" "}
-          minutes after, for testing and deploying.
-        </p>
-
         <p>
           <strong className="text-text-primary">What this cannot see:</strong>{" "}
           design, meetings, reading code, and debugging that ended without a