feat: add shared workspaces view (#991)

Add a Shared Workspaces tree view that queries shared:true and filters
out the signed-in user's own workspaces client-side, since the server
also returns workspaces we own and shared out.

Rework session state to support this safely: SessionStore owns the
deployment session and replaces the immutable SessionData object on
every sign-in/out, so providers detect concurrent session changes by
comparing object identity and drop stale fetches. Per-view behavior
(owner column, metadata watchers, owner filtering) is driven by a
WORKSPACE_QUERY_CONFIG table.

A fetch that goes stale or is requested mid-flight queues a re-fetch
that runs once the current request settles, so requests never run in
parallel and every session change ends with fresh data. Same-user
token rotations refresh client credentials in place without tearing
down the trees.

Author: EhabY

package.json

@@ -317,6 +317,13 @@
 					"visibility": "visible",
 					"icon": "media/logo-white.svg"
 				},
+				{
+					"id": "sharedWorkspaces",
+					"name": "Shared Workspaces",
+					"visibility": "visible",
+					"icon": "media/logo-white.svg",
+					"when": "coder.authenticated"
+				},
 				{
 					"id": "allWorkspaces",
 					"name": "All Workspaces",
@@ -459,6 +466,12 @@
 				"category": "Coder",
 				"icon": "$(search)"
 			},
+			{
+				"command": "coder.searchSharedWorkspaces",
+				"title": "Search",
+				"category": "Coder",
+				"icon": "$(search)"
+			},
 			{
 				"command": "coder.searchAllWorkspaces",
 				"title": "Search",
@@ -585,6 +598,10 @@
 					"command": "coder.searchMyWorkspaces",
 					"when": "false"
 				},
+				{
+					"command": "coder.searchSharedWorkspaces",
+					"when": "false"
+				},
 				{
 					"command": "coder.searchAllWorkspaces",
 					"when": "false"
@@ -628,6 +645,16 @@
 					"when": "coder.authenticated && view == myWorkspaces",
 					"group": "navigation@3"
 				},
+				{
+					"command": "coder.refreshWorkspaces",
+					"when": "coder.authenticated && view == sharedWorkspaces",
+					"group": "navigation@2"
+				},
+				{
+					"command": "coder.searchSharedWorkspaces",
+					"when": "coder.authenticated && view == sharedWorkspaces",
+					"group": "navigation@3"
+				},
 				{
 					"command": "coder.searchAllWorkspaces",
 					"when": "coder.authenticated && view == allWorkspaces",

src/core/commandManager.ts

@@ -22,6 +22,7 @@ export const CODER_COMMAND_IDS = [
 	"coder.viewLogs",
 	"coder.exportTelemetry",
 	"coder.searchMyWorkspaces",
+	"coder.searchSharedWorkspaces",
 	"coder.searchAllWorkspaces",
 	"coder.manageCredentials",
 	"coder.applyRecommendedSettings",