fix(ux): batch UX audit fixes across spine pages

Comprehensive audit findings rolled up into one pass.

Bugs:

  - dialog.tsx — sm-breakpoint centering classes (sm:left-[50%] /
    sm:top-[50%]) were being silently stripped by tailwind-merge because
    the base inset-0 + sm:inset-auto pair counted as a conflict. Replaced
    with explicit per-side utilities (top-0 right-0 bottom-0 left-0 +
    sm:right-auto sm:bottom-auto). Every Dialog instance now centers
    correctly on desktop. (Affected 16 dialog consumers.)

  - interest-documents-tab.tsx — useQuery shared the queryKey
    ['interests', interestId] with the parent InterestDetail's query but
    returned a different shape ({ data: ... } envelope vs unwrapped).
    They clobbered each other's cache on tab mount, degenerating the
    parent header to "Unknown Client" / "Open" briefly. Unified the
    queryFn shape so the cache stays consistent.

  - interest-tabs.tsx — milestone steps now derive done-state from
    PIPELINE_STAGES.indexOf(currentStage) >= step.advanceStage_idx as
    well as from the date stamp. Stage truth > date truth. Seeded /
    imported interests that arrived past `open` without per-step dates
    now correctly show their milestone steps as checked.

  - interest-detail.tsx — wires useMobileChrome so the mobile topbar
    shows the client name instead of the interest UUID.

  - interest-documents-tab.tsx — empty state restructured to a centered
    "No documents yet — Generate EOI" CTA card instead of a small
    primary button floating in the corner.

  - timeline/route.ts — synthesizes a "Created at <stage>" event when
    no audit-log rows exist for the interest, so the Activity tab
    isn't empty for seeded interests.

  - lead-source-chart.tsx — pie radii switched from fixed 90px/50px
    to "70%"/"40%" so the pie scales with the container instead of
    being clipped at narrow widths; reserved 40px for the legend.

Visual / clarity:

  - interest-detail-header.tsx — Won/Lost rendered as branded text
    buttons on desktop ("Mark won", "Close as lost") and icon-only on
    mobile via `hidden sm:inline`. Edit/Archive stay icon-only. Reopen
    promoted to a labeled button when the interest is closed. Added
    "Last contact Xd ago" to the meta row.

  - detail-header-strip.tsx — py-4 → py-3 (tighter strip).

  - interest-tabs.tsx — milestone cards: the next pending milestone
    gets a brand-blue ring + "NEXT" pill so the user can see at a
    glance which lifecycle to act on. Its primary action gets the
    filled button variant.

  - interest-tabs.tsx — Deposit milestone: invoice flow promoted to
    primary CTA ("Create deposit invoice"), manual stage advance
    demoted to a small text link ("Mark received manually"). Reflects
    the actual recommended path now that recordPayment auto-advances
    on payment.

  - inline-editable-field.tsx — pencil affordance shown faintly
    (opacity-20) at rest so users discover that fields are editable
    without having to hover-test every label. Lifts to opacity-60 on
    hover.

  - constants.ts — STAGE_SHORT_LABELS map for cramped contexts;
    pipeline-chart.tsx + pipeline-funnel-chart.tsx use them on mobile
    via useIsMobile, so the rotated 9-stage axis isn't a wall of
    overlap on a 393px screen.

  - client-pipeline-summary.tsx — StageStepper rebuilt as a single
    segmented progress bar instead of 9 micro-dots + connectors that
    rendered inconsistently at tight widths. Each stage is an equal
    slice that lights up as the interest reaches it; tooltips on hover
    give the full stage name. Also dropped a pre-existing dead `br`
    variable.

  - dashboard empty states — Lead Source, Revenue Breakdown, Pipeline
    Funnel, and Recent Activity now have helpful descriptions explaining
    what populates them, instead of bare "No interests in range".

  - use-paginated-query.ts — reuses `&` when the endpoint already has
    `?`, so callers like the documents hub don't generate
    `…?tab=eoi_queue&signatureOnly=true?page=1&limit=25` (which the API
    rejected as 400). Caught while testing the now-removed EOI route
    but applies broadly.

tsc clean. vitest 832/832 pass. eslint 0 errors (down from 1
pre-existing) on every file touched.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/interests/interest-detail.tsx

@@ -1,11 +1,13 @@
 'use client';
 
+import { useEffect } from 'react';
 import { useQuery } from '@tanstack/react-query';
 import { useParams } from 'next/navigation';
 
 import { DetailLayout } from '@/components/shared/detail-layout';
 import { InterestDetailHeader } from '@/components/interests/interest-detail-header';
 import { getInterestTabs } from '@/components/interests/interest-tabs';
+import { useMobileChrome } from '@/components/layout/mobile/mobile-layout-provider';
 import { useRealtimeInvalidation } from '@/hooks/use-realtime-invalidation';
 import { apiFetch } from '@/lib/api/client';
 
@@ -52,9 +54,7 @@ export function InterestDetail({ interestId, currentUserId }: InterestDetailProp
   const { data, isLoading } = useQuery<InterestData>({
     queryKey: ['interests', interestId],
     queryFn: () =>
-      apiFetch<{ data: InterestData }>(`/api/v1/interests/${interestId}`).then(
-        (r) => r.data,
-      ),
+      apiFetch<{ data: InterestData }>(`/api/v1/interests/${interestId}`).then((r) => r.data),
   });
 
   useRealtimeInvalidation({
@@ -65,17 +65,18 @@ export function InterestDetail({ interestId, currentUserId }: InterestDetailProp
     'interest:berthUnlinked': [['interests', interestId]],
   });
 
-  const tabs = data
-    ? getInterestTabs({ interestId, currentUserId, interest: data })
-    : [];
+  const { setChrome } = useMobileChrome();
+  const titleForChrome: string | null = data?.clientName ?? null;
+  useEffect(() => {
+    setChrome({ title: titleForChrome, showBackButton: true });
+    return () => setChrome({ title: null, showBackButton: false });
+  }, [titleForChrome, setChrome]);
+
+  const tabs = data ? getInterestTabs({ interestId, currentUserId, interest: data }) : [];
 
   return (
     <DetailLayout
-      header={
-        data ? (
-          <InterestDetailHeader portSlug={portSlug} interest={data} />
-        ) : null
-      }
+      header={data ? <InterestDetailHeader portSlug={portSlug} interest={data} /> : null}
       tabs={tabs}
       defaultTab="overview"
       isLoading={isLoading}