feat(sources): favorites, views, and filters via pick-source

Pearl now treats Linear sources (favorites, custom views, ad-hoc filters, saved queries) as one surface. `pearl-pick-source` is the unified picker: it lists every Linear favorite alongside every locally saved query, and dispatches by kind. View / project / cycle / label / user favorites resolve to runnable filter or view sources; issue / document / dashboard favorites open in the browser since they aren't lists.

The filter compiler grows id-based forms (`:label-id` and `:assignee-id`), so favorites that name a Linear entity (a user, a label) compile to rename-proof queries rather than fragile name matching. The ad-hoc builder gets a matching member-assignee option ("me / member / any"), so a one-off "what's a teammate working on?" doesn't require building a saved query first.

Two pre-existing builder bugs surfaced during verify and got fixed in the same pass. The builder previously passed display names straight to the compiler, but `:team` compiles to `team.key.eq` and `:project` to `project.id.eq`, so Linear rejected every builder run that pinned a team or project. Now the builder resolves the picked name to its key / id before assembling. And `pearl-list-issues-by-project` previously injected `:assignee :me` into the filter, hiding every teammate's work in the project. It now returns the whole project.

The save prompt on the builder was rewritten so the local-only nature is unambiguous, and the README grew a Sources section plus a keymap-table entry for `f s`.

1 files changed, 5 insertions, 4 deletions

diff --git a/docs/issue-sources-spec.org b/docs/issue-sources-spec.org
index 101e13a..a4374c3 100644
--- a/docs/issue-sources-spec.org
+++ b/docs/issue-sources-spec.org
@@ -37,7 +37,9 @@ Each =Favorite= node carries =type= (the dispatch key), =title= (a ready display
 
 : query { favorites { nodes { id type title url sortOrder
 :   customView { id } project { id } cycle { id }
-:   label { id } user { id } issue { id identifier } team { id } } } }
+:   label { id } user { id } issue { id identifier }
+:   team { id } projectLabel { id } document { id } dashboard { id } }
+:   pageInfo { hasNextPage endCursor } } }
 
 Introspection of the =Favorite= type confirmed the favoritable entity fields: =issue=, =project=, =cycle=, =customView=, =label=, =projectLabel=, =user=, =team=, =document=, =initiative=, =dashboard=, =pullRequest=, =release=, =releaseNote=, =facet=, =predefinedViewType=, =projectTab=, =customer=, plus convenience fields =title=, =url=, =detail=, =color=, =icon=, =folderName=, =owner=, =sortOrder=. Craig's current 9 favorites span customView / project / issue; the schema supports the rest.
 
@@ -49,12 +51,11 @@ Pagination: the =favorites= connection is paginated like other Linear connection
 
 | favorite =type=      | required API fields    | v1 action          | persisted source                                   |
 |----------------------+------------------------+--------------------+----------------------------------------------------|
-| =customView=         | =customView.id=, title | run the view       | =(:type view :name T :view-id ID)=                 |
+| =customView=         | =customView.id=, title | run the view       | =(:type view :name T :id ID :url URL)=             |
 | =project=            | =project.id=, title    | filter             | =(:type filter :name T :filter (:project ID :open t))= |
 | =cycle=              | =cycle.id=, title      | filter             | =(:type filter :name T :filter (:cycle ID :open t))=   |
-| =label= / =projectLabel= | =label.id=, title  | filter             | =(:type filter :name T :filter (:label-id ID :open t))= |
+| =label=              | =label.id=, title      | filter             | =(:type filter :name T :filter (:label-id ID :open t))= |
 | =user=               | =user.id=, title       | filter             | =(:type filter :name T :filter (:assignee-id ID :open t))= |
-| =team=               | =team.id=, title       | filter             | =(:type filter :name T :filter (:team ID :open t))=    |
 | =issue=              | =issue.identifier=, url | browser-only (HP2) | none — opens =url=, renders no source              |
 | anything else        | =url=, title           | browser-only       | none — opens =url=                                 |