Missing icons on Agent, Provider, and Skill partition roots — blank cards in search results on every distributed portal #132

Problem

The Agent, Provider, and Skill partition space roots have no Icon set in their IStaticRepoSource.PartitionRoot definitions. On any distributed (Orleans/PG) portal, these nodes appear as blank cards in search results and catalogs wherever a space root is displayed. The issue affects every deployment running Memex.Portal.Distributed with the default Features:StaticRepoSync:Partitions list — it is not specific to any single deployment.

A secondary issue: the Doc partition root has had Icon = "/static/NodeTypeIcons/organization.svg" since 0cb624cd0 (2026-06-10), but any deployment whose Doc partition was last imported before that date will show a blank Documentation card until the import re-runs with the updated fingerprint.

Root cause

The three PartitionRoot definitions in src/MeshWeaver.AI/ do not set an Icon field:

All icon files referenced below exist in src/MeshWeaver.Graph/Icons/ and are served under /static/NodeTypeIcons/. There are no broken file references — the problem is purely that the three sources never set an Icon on their PartitionRoot.

Fix

Add Icon = to each of the three PartitionRoot definitions, following the same pattern as DocumentationStaticRepoSource and HarnessStaticRepoSource:

AgentStaticRepoSource.cs — PartitionRoot:

Icon = "/static/NodeTypeIcons/sparkle.svg",

ModelStaticRepoSource.cs — PartitionRoot:

Icon = "/static/NodeTypeIcons/database.svg",

SkillStaticRepoSource.cs — PartitionRoot:

Icon = "/static/NodeTypeIcons/sparkle.svg",

Adding the Icon field changes the partition root's content, which changes the source fingerprint. On the next portal startup, StaticRepoImporter detects the new fingerprint, runs a fresh import, and upserts the partition root with the icon — no manual SQL, no data loss, no restart beyond the normal rolling update.

Scope

Every partition root emitted by an IStaticRepoSource should set a meaningful Icon. The pattern to enforce: when adding a new DB-synced partition, its PartitionRoot must include both Icon and NodeType (as DocumentationStaticRepoSource and HarnessStaticRepoSource already do).