Add classified evidence presentations

docs/exhibit-data-model.md

@@ -8,6 +8,7 @@ Status: accepted design foundation; the core schema, template lifecycle, fronten
 - An **exhibit type** describes its domain behavior: folder, document, clipping, note, event, party, or conclusion.
 - A **widget** is the frontend visualization and interaction implementation selected for an exhibit type.
 - A **document type** specializes a document exhibit: image, PDF, web capture, email, article, filing, price list, text, or generic file.
+- A **capture kind** describes how imported image evidence is understood and physically presented: photo, scene, clipping, full page, or not yet classified. It is independent of file format and document type.
 - A **board** is a neutral container for exhibits. Both mutable levels and immutable template versions own boards.
 - A board may define a temporal viewport (`board_timeline_settings`). If absent, the client derives a range from dated evidence; if present, the range clones and resets with the board.
 - A **level** is a mutable board copy used for either play or authoring.
@@ -121,9 +122,17 @@ CREATE TABLE osint.document_types (
   name TEXT NOT NULL UNIQUE
 );
 
+CREATE TABLE osint.document_capture_kinds (
+  id TEXT PRIMARY KEY,
+  name TEXT NOT NULL UNIQUE,
+  description TEXT NOT NULL
+);
+
 CREATE TABLE osint.document_exhibits (
   exhibit_id UUID PRIMARY KEY REFERENCES osint.exhibits(id) ON DELETE CASCADE,
   document_type_id TEXT NOT NULL REFERENCES osint.document_types(id),
+  capture_kind_id TEXT NOT NULL DEFAULT 'unclassified'
+    REFERENCES osint.document_capture_kinds(id),
   asset_id UUID REFERENCES osint.assets(id),
   title TEXT NOT NULL,
   published_at TIMESTAMPTZ,
@@ -296,7 +305,7 @@ Red investigative thread is derived from `exhibit_connections`. Extraction prove
 
 ## Document metadata
 
-Known, semantically important values remain real columns: `published_at`, `captured_at`, and `source_uri`. Truly author-defined fields use typed metadata definitions and values rather than JSONB or one untyped EAV table.
+Known, semantically important values remain real columns: `published_at`, `captured_at`, `source_uri`, and `capture_kind_id`. Capture kind is player-selected source interpretation used for physical board presentation and contextual connection copy; it never changes the immutable asset, OCR text, provenance, MIME type, or document type. Truly author-defined fields use typed metadata definitions and values rather than JSONB or one untyped EAV table.
 
 ```sql
 CREATE TABLE osint.metadata_fields (
@@ -323,7 +332,7 @@ The following are computed and must not become duplicate source-of-truth tables:
 - Grey timeline projection: document exhibit position to `published_at` on the timeline.
 - Pale red containment band: folder position to contained exhibit position.
 - Folder flight animation: closed folder position to the exhibit's stored `xpos` and `ypos`.
-- Widget selection: `exhibit_type` plus optional `document_type` mapped through the frontend registry.
+- Widget selection: `exhibit_type` plus optional `document_type` mapped through the frontend registry. For imported image documents, `capture_kind` selects a physical presentation variant within that document widget.
 
 ## Transactional operations