feat: dashboard maps the activity, follows a ticket's way and the proposals

Three more blocks on the project dashboard, also by REST, GraphQL and
MCP:
- Activity: what moved each day of the last 12 weeks, in a heatmap,
  with the busiest weekday and the longest lull.
- A ticket's way: for the tickets done in the last 90 days, where the
  time from created to done went, status by status (waiting included),
  and how much of it was work (flow efficiency).
- The public's proposals: received, waiting, under way, done and
  discarded, and the most voted still unanswered.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/api/schema.gql

@@ -13,6 +13,14 @@ type Activity {
   type: String!
 }
 
+"""How much happened on one day"""
+type ActivityDay {
+  count: Int!
+
+  """YYYY-MM-DD"""
+  day: String!
+}
+
 input AddChecklistItemInput {
   issueId: ID!
   text: String!
@@ -815,6 +823,28 @@ input IssueTypeOptionInput {
   template: IssueTemplateInput
 }
 
+"""
+Where the time of the tickets done in the last 90 days went, created to done
+"""
+type Journey {
+  """Part of the lead time in an in-progress status, 0-100"""
+  flowEfficiency: Int
+  leadDays: Float
+  samples: Int!
+  steps: [JourneyStep!]!
+}
+
+type JourneyStep {
+  """Average days a closed ticket spent in it"""
+  days: Float!
+
+  """Its part of the whole lead time, 0-100"""
+  share: Int!
+
+  """Status id of the project settings"""
+  status: String!
+}
+
 enum LinkDirection {
   INWARD
   OUTWARD
@@ -1283,6 +1313,13 @@ type ProjectInsights {
   """One per active list custom field"""
   fields: [FieldBreakdown!]!
   generatedAt: String!
+
+  """The last 12 weeks from a Monday, oldest first (84 days)"""
+  heatmap: [ActivityDay!]!
+  journey: Journey!
+
+  """Null while the project has never had a proposal"""
+  proposals: ProposalsFunnel
   quality: Quality!
   releases: [ReleaseForecast!]!
   risks: Risks!
@@ -1361,6 +1398,23 @@ type ProjectStats {
   total: Int!
 }
 
+"""The public's proposals, from received to done or discarded"""
+type ProposalsFunnel {
+  discarded: Int!
+  done: Int!
+  received: Int!
+
+  """In the last 30 days"""
+  receivedLately: Int!
+
+  """Most voted waiting, at most 5"""
+  topWaiting: [WaitingProposal!]!
+  underWay: Int!
+
+  """Open, not started, in no sprint nor release"""
+  waiting: Int!
+}
+
 """A browser's Web Push subscription (PushSubscription.toJSON())"""
 input PushSubscriptionInput {
   auth: String!
@@ -1914,6 +1968,15 @@ type UserRef {
   name: String!
 }
 
+type WaitingProposal {
+  """Days since it came in"""
+  days: Int!
+  id: ID!
+  key: String!
+  title: String!
+  votes: Int!
+}
+
 """
 Where the project tells another system what happened (signed POST, HMAC-SHA256)
 """