fix(ci): resolve all test failures + complete rename compat layer

Sisyphus-authored fixes across 15 files:

- plugin-identity: align CONFIG_BASENAME with actual config file name
- add-plugin-to-opencode-config: handle legacy→canonical name migration
- plugin-detection tests: update expectations for new identity constants
- doctor/system: fix legacy name warning test assertions
- install tests: align with new plugin name
- chat-params tests: fix mock isolation
- model-capabilities tests: fix snapshot expectations
- image-converter: fix platform-dependent test assertions (Linux CI)
- example configs: expanded with more detailed comments

Full suite: 4484 pass, 0 fail, typecheck clean.

src/shared/legacy-plugin-warning.test.ts

@@ -0,0 +1,97 @@
+import { afterEach, beforeEach, describe, expect, it } from "bun:test"
+import { mkdirSync, rmSync, writeFileSync } from "node:fs"
+import { tmpdir } from "node:os"
+import { join } from "node:path"
+import { checkForLegacyPluginEntry } from "./legacy-plugin-warning"
+
+describe("checkForLegacyPluginEntry", () => {
+  let testConfigDir = ""
+  let originalXdgConfigHome: string | undefined
+  let originalOpenCodeConfigDir: string | undefined
+
+  beforeEach(() => {
+    originalXdgConfigHome = process.env.XDG_CONFIG_HOME
+    originalOpenCodeConfigDir = process.env.OPENCODE_CONFIG_DIR
+    testConfigDir = join(tmpdir(), `omo-legacy-check-${Date.now()}-${Math.random().toString(36).slice(2)}`)
+    mkdirSync(join(testConfigDir, "opencode"), { recursive: true })
+    process.env.XDG_CONFIG_HOME = testConfigDir
+    delete process.env.OPENCODE_CONFIG_DIR
+  })
+
+  afterEach(() => {
+    if (originalXdgConfigHome === undefined) {
+      delete process.env.XDG_CONFIG_HOME
+    } else {
+      process.env.XDG_CONFIG_HOME = originalXdgConfigHome
+    }
+
+    if (originalOpenCodeConfigDir === undefined) {
+      delete process.env.OPENCODE_CONFIG_DIR
+    } else {
+      process.env.OPENCODE_CONFIG_DIR = originalOpenCodeConfigDir
+    }
+
+    rmSync(testConfigDir, { recursive: true, force: true })
+  })
+
+  it("detects a bare legacy plugin entry", () => {
+    // given
+    writeFileSync(join(testConfigDir, "opencode", "opencode.json"), JSON.stringify({ plugin: ["oh-my-opencode"] }, null, 2))
+
+    // when
+    const result = checkForLegacyPluginEntry()
+
+    // then
+    expect(result.hasLegacyEntry).toBe(true)
+    expect(result.hasCanonicalEntry).toBe(false)
+    expect(result.legacyEntries).toEqual(["oh-my-opencode"])
+  })
+
+  it("detects a version-pinned legacy plugin entry", () => {
+    // given
+    writeFileSync(join(testConfigDir, "opencode", "opencode.json"), JSON.stringify({ plugin: ["oh-my-opencode@3.10.0"] }, null, 2))
+
+    // when
+    const result = checkForLegacyPluginEntry()
+
+    // then
+    expect(result.hasLegacyEntry).toBe(true)
+    expect(result.hasCanonicalEntry).toBe(false)
+    expect(result.legacyEntries).toEqual(["oh-my-opencode@3.10.0"])
+  })
+
+  it("does not flag a canonical plugin entry", () => {
+    // given
+    writeFileSync(join(testConfigDir, "opencode", "opencode.json"), JSON.stringify({ plugin: ["oh-my-openagent"] }, null, 2))
+
+    // when
+    const result = checkForLegacyPluginEntry()
+
+    // then
+    expect(result.hasLegacyEntry).toBe(false)
+    expect(result.hasCanonicalEntry).toBe(true)
+    expect(result.legacyEntries).toEqual([])
+  })
+
+  it("detects legacy entries in quoted jsonc config", () => {
+    // given
+    writeFileSync(join(testConfigDir, "opencode", "opencode.jsonc"), '{\n  "plugin": ["oh-my-opencode"]\n}\n')
+
+    // when
+    const result = checkForLegacyPluginEntry()
+
+    // then
+    expect(result.hasLegacyEntry).toBe(true)
+    expect(result.legacyEntries).toEqual(["oh-my-opencode"])
+  })
+
+  it("returns no warning data when config is missing", () => {
+    // when
+    const result = checkForLegacyPluginEntry()
+
+    // then
+    expect(result.hasLegacyEntry).toBe(false)
+    expect(result.hasCanonicalEntry).toBe(false)
+    expect(result.legacyEntries).toEqual([])
+  })
+})